--- Begin Message ---
Package: release.debian.org
Severity: normal
Tags: jessie
User: release.debian....@packages.debian.org
Usertags: pu
Dear stable release managers,
I would like to upload a new glibc package for the next jessie release.
It's basically a pull from the upstream stable branch. It mostly fixes
security issues which do not warrant a separate DSA, a regression
introduced by CVE-2015-7547, and issues with *context functions on s390x
preventing docker to work.
All those changes are already in testing/unstable/experimental for a few
weeks. You will find the diff below. It is a bit big given the patch we
were using for CVE-2015-7547 has been merged upstream, so it actually
appears twice in the diff.
I am really sorry for sending that so late with regards to the deadline,
I really hope it can be included in the 8.5 release.
Thanks,
Aurelien
diff --git a/debian/changelog b/debian/changelog
index db98ce0..c96e478 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,18 @@
+glibc (2.19-18+deb8u5) UNRELEASED; urgency=medium
+
+ [ Aurelien Jarno ]
+ * Update from upstream stable branch:
+ - Drop debian/patches/any/local-CVE-2015-7547.diff.
+ - Refresh debian/patches/any/cvs-resolv-first-query-failure.diff.
+ - Fix assertion failure with unconnectable name server addresses.
+ (regression introduced by CVE-2015-7547). Closes: #816669.
+ - Fix *context functions on s390x.
+ - Fix a buffer overflow in the glob function (CVE-2016-1234).
+ - Fix a stack overflow in nss_dns_getnetbyname_r (CVE-2016-3075).
+ - Fix a stack overflow in getaddrinfo function (CVE-2016-3706).
+
+ -- Aurelien Jarno <aure...@debian.org> Sun, 01 May 2016 16:38:48 +0200
+
glibc (2.19-18+deb8u4) stable; urgency=medium
[ Aurelien Jarno ]
diff --git a/debian/patches/any/cvs-resolv-first-query-failure.diff
b/debian/patches/any/cvs-resolv-first-query-failure.diff
index d99e636..856d850 100644
--- a/debian/patches/any/cvs-resolv-first-query-failure.diff
+++ b/debian/patches/any/cvs-resolv-first-query-failure.diff
@@ -44,11 +44,11 @@ diff --git a/resolv/res_send.c b/resolv/res_send.c
if (recvresp1 || (buf2 != NULL && recvresp2)) {
*resplen2 = 0;
return resplen;
-@@ -1368,7 +1369,6 @@ send_dg(res_state statp,
+@@ -1527,7 +1528,6 @@ send_dg(res_state statp,
goto wait;
}
- next_ns:
- __res_iclose(statp, false);
/* don't retry if called from dig */
if (!statp->pfcode)
+ return close_and_return_error (statp, resplen2);
diff --git a/debian/patches/any/local-CVE-2015-7547.diff
b/debian/patches/any/local-CVE-2015-7547.diff
deleted file mode 100644
index 0a93cd5..0000000
--- a/debian/patches/any/local-CVE-2015-7547.diff
+++ /dev/null
@@ -1,541 +0,0 @@
---- a/resolv/nss_dns/dns-host.c
-+++ b/resolv/nss_dns/dns-host.c
-@@ -1052,7 +1052,10 @@
- int h_namelen = 0;
-
- if (ancount == 0)
-- return NSS_STATUS_NOTFOUND;
-+ {
-+ *h_errnop = HOST_NOT_FOUND;
-+ return NSS_STATUS_NOTFOUND;
-+ }
-
- while (ancount-- > 0 && cp < end_of_message && had_error == 0)
- {
-@@ -1229,7 +1232,14 @@
- /* Special case here: if the resolver sent a result but it only
- contains a CNAME while we are looking for a T_A or T_AAAA record,
- we fail with NOTFOUND instead of TRYAGAIN. */
-- return canon == NULL ? NSS_STATUS_TRYAGAIN : NSS_STATUS_NOTFOUND;
-+ if (canon != NULL)
-+ {
-+ *h_errnop = HOST_NOT_FOUND;
-+ return NSS_STATUS_NOTFOUND;
-+ }
-+
-+ *h_errnop = NETDB_INTERNAL;
-+ return NSS_STATUS_TRYAGAIN;
- }
-
-
-@@ -1243,11 +1253,101 @@
-
- enum nss_status status = NSS_STATUS_NOTFOUND;
-
-+ /* Combining the NSS status of two distinct queries requires some
-+ compromise and attention to symmetry (A or AAAA queries can be
-+ returned in any order). What follows is a breakdown of how this
-+ code is expected to work and why. We discuss only SUCCESS,
-+ TRYAGAIN, NOTFOUND and UNAVAIL, since they are the only returns
-+ that apply (though RETURN and MERGE exist). We make a distinction
-+ between TRYAGAIN (recoverable) and TRYAGAIN' (not-recoverable).
-+ A recoverable TRYAGAIN is almost always due to buffer size issues
-+ and returns ERANGE in errno and the caller is expected to retry
-+ with a larger buffer.
-+
-+ Lastly, you may be tempted to make significant changes to the
-+ conditions in this code to bring about symmetry between responses.
-+ Please don't change anything without due consideration for
-+ expected application behaviour. Some of the synthesized responses
-+ aren't very well thought out and sometimes appear to imply that
-+ IPv4 responses are always answer 1, and IPv6 responses are always
-+ answer 2, but that's not true (see the implemetnation of send_dg
-+ and send_vc to see response can arrive in any order, particlarly
-+ for UDP). However, we expect it holds roughly enough of the time
-+ that this code works, but certainly needs to be fixed to make this
-+ a more robust implementation.
-+
-+ ----------------------------------------------
-+ | Answer 1 Status / | Synthesized | Reason |
-+ | Answer 2 Status | Status | |
-+ |--------------------------------------------|
-+ | SUCCESS/SUCCESS | SUCCESS | [1] |
-+ | SUCCESS/TRYAGAIN | TRYAGAIN | [5] |
-+ | SUCCESS/TRYAGAIN' | SUCCESS | [1] |
-+ | SUCCESS/NOTFOUND | SUCCESS | [1] |
-+ | SUCCESS/UNAVAIL | SUCCESS | [1] |
-+ | TRYAGAIN/SUCCESS | TRYAGAIN | [2] |
-+ | TRYAGAIN/TRYAGAIN | TRYAGAIN | [2] |
-+ | TRYAGAIN/TRYAGAIN' | TRYAGAIN | [2] |
-+ | TRYAGAIN/NOTFOUND | TRYAGAIN | [2] |
-+ | TRYAGAIN/UNAVAIL | TRYAGAIN | [2] |
-+ | TRYAGAIN'/SUCCESS | SUCCESS | [3] |
-+ | TRYAGAIN'/TRYAGAIN | TRYAGAIN | [3] |
-+ | TRYAGAIN'/TRYAGAIN' | TRYAGAIN' | [3] |
-+ | TRYAGAIN'/NOTFOUND | TRYAGAIN' | [3] |
-+ | TRYAGAIN'/UNAVAIL | UNAVAIL | [3] |
-+ | NOTFOUND/SUCCESS | SUCCESS | [3] |
-+ | NOTFOUND/TRYAGAIN | TRYAGAIN | [3] |
-+ | NOTFOUND/TRYAGAIN' | TRYAGAIN' | [3] |
-+ | NOTFOUND/NOTFOUND | NOTFOUND | [3] |
-+ | NOTFOUND/UNAVAIL | UNAVAIL | [3] |
-+ | UNAVAIL/SUCCESS | UNAVAIL | [4] |
-+ | UNAVAIL/TRYAGAIN | UNAVAIL | [4] |
-+ | UNAVAIL/TRYAGAIN' | UNAVAIL | [4] |
-+ | UNAVAIL/NOTFOUND | UNAVAIL | [4] |
-+ | UNAVAIL/UNAVAIL | UNAVAIL | [4] |
-+ ----------------------------------------------
-+
-+ [1] If the first response is a success we return success.
-+ This ignores the state of the second answer and in fact
-+ incorrectly sets errno and h_errno to that of the second
-+ answer. However because the response is a success we ignore
-+ *errnop and *h_errnop (though that means you touched errno on
-+ success). We are being conservative here and returning the
-+ likely IPv4 response in the first answer as a success.
-+
-+ [2] If the first response is a recoverable TRYAGAIN we return
-+ that instead of looking at the second response. The
-+ expectation here is that we have failed to get an IPv4 response
-+ and should retry both queries.
-+
-+ [3] If the first response was not a SUCCESS and the second
-+ response is not NOTFOUND (had a SUCCESS, need to TRYAGAIN,
-+ or failed entirely e.g. TRYAGAIN' and UNAVAIL) then use the
-+ result from the second response, otherwise the first responses
-+ status is used. Again we have some odd side-effects when the
-+ second response is NOTFOUND because we overwrite *errnop and
-+ *h_errnop that means that a first answer of NOTFOUND might see
-+ its *errnop and *h_errnop values altered. Whether it matters
-+ in practice that a first response NOTFOUND has the wrong
-+ *errnop and *h_errnop is undecided.
-+
-+ [4] If the first response is UNAVAIL we return that instead of
-+ looking at the second response. The expectation here is that
-+ it will have failed similarly e.g. configuration failure.
-+
-+ [5] Testing this code is complicated by the fact that truncated
-+ second response buffers might be returned as SUCCESS if the
-+ first answer is a SUCCESS. To fix this we add symmetry to
-+ TRYAGAIN with the second response. If the second response
-+ is a recoverable error we now return TRYAGIN even if the first
-+ response was SUCCESS. */
-+
- if (anslen1 > 0)
- status = gaih_getanswer_slice(answer1, anslen1, qname,
- &pat, &buffer, &buflen,
- errnop, h_errnop, ttlp,
- &first);
-+
- if ((status == NSS_STATUS_SUCCESS || status == NSS_STATUS_NOTFOUND
- || (status == NSS_STATUS_TRYAGAIN
- /* We want to look at the second answer in case of an
-@@ -1263,8 +1363,15 @@
- &pat, &buffer, &buflen,
- errnop, h_errnop, ttlp,
- &first);
-+ /* Use the second response status in some cases. */
- if (status != NSS_STATUS_SUCCESS && status2 != NSS_STATUS_NOTFOUND)
- status = status2;
-+ /* Do not return a truncated second response (unless it was
-+ unavoidable e.g. unrecoverable TRYAGAIN). */
-+ if (status == NSS_STATUS_SUCCESS
-+ && (status2 == NSS_STATUS_TRYAGAIN
-+ && *errnop == ERANGE && *h_errnop != NO_RECOVERY))
-+ status = NSS_STATUS_TRYAGAIN;
- }
-
- return status;
---- a/resolv/res_query.c
-+++ b/resolv/res_query.c
-@@ -396,6 +396,7 @@
- {
- free (*answerp2);
- *answerp2 = NULL;
-+ *nanswerp2 = 0;
- *answerp2_malloced = 0;
- }
- }
-@@ -436,6 +437,7 @@
- {
- free (*answerp2);
- *answerp2 = NULL;
-+ *nanswerp2 = 0;
- *answerp2_malloced = 0;
- }
-
-@@ -509,6 +511,7 @@
- {
- free (*answerp2);
- *answerp2 = NULL;
-+ *nanswerp2 = 0;
- *answerp2_malloced = 0;
- }
- if (saved_herrno != -1)
---- a/resolv/res_send.c
-+++ b/resolv/res_send.c
-@@ -1,3 +1,20 @@
-+/* Copyright (C) 2016 Free Software Foundation, Inc.
-+ This file is part of the GNU C Library.
-+
-+ The GNU C Library is free software; you can redistribute it and/or
-+ modify it under the terms of the GNU Lesser General Public
-+ License as published by the Free Software Foundation; either
-+ version 2.1 of the License, or (at your option) any later version.
-+
-+ The GNU C Library is distributed in the hope that it will be useful,
-+ but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-+ Lesser General Public License for more details.
-+
-+ You should have received a copy of the GNU Lesser General Public
-+ License along with the GNU C Library; if not, see
-+ <http://www.gnu.org/licenses/>. */
-+
- /*
- * Copyright (c) 1985, 1989, 1993
- * The Regents of the University of California. All rights reserved.
-@@ -360,6 +377,8 @@
- #ifdef USE_HOOKS
- if (__builtin_expect (statp->qhook || statp->rhook, 0)) {
- if (anssiz < MAXPACKET && ansp) {
-+ /* Always allocate MAXPACKET, callers expect
-+ this specific size. */
- u_char *buf = malloc (MAXPACKET);
- if (buf == NULL)
- return (-1);
-@@ -653,6 +672,77 @@
-
- /* Private */
-
-+/* The send_vc function is responsible for sending a DNS query over TCP
-+ to the nameserver numbered NS from the res_state STATP i.e.
-+ EXT(statp).nssocks[ns]. The function supports sending both IPv4 and
-+ IPv6 queries at the same serially on the same socket.
-+
-+ Please note that for TCP there is no way to disable sending both
-+ queries, unlike UDP, which honours RES_SNGLKUP and RES_SNGLKUPREOP
-+ and sends the queries serially and waits for the result after each
-+ sent query. This implemetnation should be corrected to honour these
-+ options.
-+
-+ Please also note that for TCP we send both queries over the same
-+ socket one after another. This technically violates best practice
-+ since the server is allowed to read the first query, respond, and
-+ then close the socket (to service another client). If the server
-+ does this, then the remaining second query in the socket data buffer
-+ will cause the server to send the client an RST which will arrive
-+ asynchronously and the client's OS will likely tear down the socket
-+ receive buffer resulting in a potentially short read and lost
-+ response data. This will force the client to retry the query again,
-+ and this process may repeat until all servers and connection resets
-+ are exhausted and then the query will fail. It's not known if this
-+ happens with any frequency in real DNS server implementations. This
-+ implementation should be corrected to use two sockets by default for
-+ parallel queries.
-+
-+ The query stored in BUF of BUFLEN length is sent first followed by
-+ the query stored in BUF2 of BUFLEN2 length. Queries are sent
-+ serially on the same socket.
-+
-+ Answers to the query are stored firstly in *ANSP up to a max of
-+ *ANSSIZP bytes. If more than *ANSSIZP bytes are needed and ANSCP
-+ is non-NULL (to indicate that modifying the answer buffer is allowed)
-+ then malloc is used to allocate a new response buffer and ANSCP and
-+ ANSP will both point to the new buffer. If more than *ANSSIZP bytes
-+ are needed but ANSCP is NULL, then as much of the response as
-+ possible is read into the buffer, but the results will be truncated.
-+ When truncation happens because of a small answer buffer the DNS
-+ packets header feild TC will bet set to 1, indicating a truncated
-+ message and the rest of the socket data will be read and discarded.
-+
-+ Answers to the query are stored secondly in *ANSP2 up to a max of
-+ *ANSSIZP2 bytes, with the actual response length stored in
-+ *RESPLEN2. If more than *ANSSIZP bytes are needed and ANSP2
-+ is non-NULL (required for a second query) then malloc is used to
-+ allocate a new response buffer, *ANSSIZP2 is set to the new buffer
-+ size and *ANSP2_MALLOCED is set to 1.
-+
-+ The ANSP2_MALLOCED argument will eventually be removed as the
-+ change in buffer pointer can be used to detect the buffer has
-+ changed and that the caller should use free on the new buffer.
-+
-+ Note that the answers may arrive in any order from the server and
-+ therefore the first and second answer buffers may not correspond to
-+ the first and second queries.
-+
-+ It is not supported to call this function with a non-NULL ANSP2
-+ but a NULL ANSCP. Put another way, you can call send_vc with a
-+ single unmodifiable buffer or two modifiable buffers, but no other
-+ combination is supported.
-+
-+ It is the caller's responsibility to free the malloc allocated
-+ buffers by detecting that the pointers have changed from their
-+ original values i.e. *ANSCP or *ANSP2 has changed.
-+
-+ If errors are encountered then *TERRNO is set to an appropriate
-+ errno value and a zero result is returned for a recoverable error,
-+ and a less-than zero result is returned for a non-recoverable error.
-+
-+ If no errors are encountered then *TERRNO is left unmodified and
-+ a the length of the first response in bytes is returned. */
- static int
- send_vc(res_state statp,
- const u_char *buf, int buflen, const u_char *buf2, int buflen2,
-@@ -662,11 +752,7 @@
- {
- const HEADER *hp = (HEADER *) buf;
- const HEADER *hp2 = (HEADER *) buf2;
-- u_char *ans = *ansp;
-- int orig_anssizp = *anssizp;
-- // XXX REMOVE
-- // int anssiz = *anssizp;
-- HEADER *anhp = (HEADER *) ans;
-+ HEADER *anhp = (HEADER *) *ansp;
- struct sockaddr_in6 *nsap = EXT(statp).nsaddrs[ns];
- int truncating, connreset, resplen, n;
- struct iovec iov[4];
-@@ -742,6 +828,8 @@
- * Receive length & response
- */
- int recvresp1 = 0;
-+ /* Skip the second response if there is no second query.
-+ To do that we mark the second response as received. */
- int recvresp2 = buf2 == NULL;
- uint16_t rlen16;
- read_len:
-@@ -778,33 +866,14 @@
- u_char **thisansp;
- int *thisresplenp;
- if ((recvresp1 | recvresp2) == 0 || buf2 == NULL) {
-+ /* We have not received any responses
-+ yet or we only have one response to
-+ receive. */
- thisanssizp = anssizp;
- thisansp = anscp ?: ansp;
- assert (anscp != NULL || ansp2 == NULL);
- thisresplenp = &resplen;
- } else {
-- if (*anssizp != MAXPACKET) {
-- /* No buffer allocated for the first
-- reply. We can try to use the rest
-- of the user-provided buffer. */
--#ifdef _STRING_ARCH_unaligned
-- *anssizp2 = orig_anssizp - resplen;
-- *ansp2 = *ansp + resplen;
--#else
-- int aligned_resplen
-- = ((resplen + __alignof__ (HEADER) - 1)
-- & ~(__alignof__ (HEADER) - 1));
-- *anssizp2 = orig_anssizp - aligned_resplen;
-- *ansp2 = *ansp + aligned_resplen;
--#endif
-- } else {
-- /* The first reply did not fit into the
-- user-provided buffer. Maybe the second
-- answer will. */
-- *anssizp2 = orig_anssizp;
-- *ansp2 = *ansp;
-- }
--
- thisanssizp = anssizp2;
- thisansp = ansp2;
- thisresplenp = resplen2;
-@@ -812,10 +881,14 @@
- anhp = (HEADER *) *thisansp;
-
- *thisresplenp = rlen;
-- if (rlen > *thisanssizp) {
-- /* Yes, we test ANSCP here. If we have two buffers
-- both will be allocatable. */
-- if (__builtin_expect (anscp != NULL, 1)) {
-+ /* Is the answer buffer too small? */
-+ if (*thisanssizp < rlen) {
-+ /* If the current buffer is non-NULL and it's not
-+ pointing at the static user-supplied buffer then
-+ we can reallocate it. */
-+ if (thisansp != NULL && thisansp != ansp) {
-+ /* Always allocate MAXPACKET, callers expect
-+ this specific size. */
- u_char *newp = malloc (MAXPACKET);
- if (newp == NULL) {
- *terrno = ENOMEM;
-@@ -827,6 +900,9 @@
- if (thisansp == ansp2)
- *ansp2_malloced = 1;
- anhp = (HEADER *) newp;
-+ /* A uint16_t can't be larger than MAXPACKET
-+ thus it's safe to allocate MAXPACKET but
-+ read RLEN bytes instead. */
- len = rlen;
- } else {
- Dprint(statp->options & RES_DEBUG,
-@@ -998,6 +1074,66 @@
- return 1;
- }
-
-+/* The send_dg function is responsible for sending a DNS query over UDP
-+ to the nameserver numbered NS from the res_state STATP i.e.
-+ EXT(statp).nssocks[ns]. The function supports IPv4 and IPv6 queries
-+ along with the ability to send the query in parallel for both stacks
-+ (default) or serially (RES_SINGLKUP). It also supports serial lookup
-+ with a close and reopen of the socket used to talk to the server
-+ (RES_SNGLKUPREOP) to work around broken name servers.
-+
-+ The query stored in BUF of BUFLEN length is sent first followed by
-+ the query stored in BUF2 of BUFLEN2 length. Queries are sent
-+ in parallel (default) or serially (RES_SINGLKUP or RES_SNGLKUPREOP).
-+
-+ Answers to the query are stored firstly in *ANSP up to a max of
-+ *ANSSIZP bytes. If more than *ANSSIZP bytes are needed and ANSCP
-+ is non-NULL (to indicate that modifying the answer buffer is allowed)
-+ then malloc is used to allocate a new response buffer and ANSCP and
-+ ANSP will both point to the new buffer. If more than *ANSSIZP bytes
-+ are needed but ANSCP is NULL, then as much of the response as
-+ possible is read into the buffer, but the results will be truncated.
-+ When truncation happens because of a small answer buffer the DNS
-+ packets header feild TC will bet set to 1, indicating a truncated
-+ message, while the rest of the UDP packet is discarded.
-+
-+ Answers to the query are stored secondly in *ANSP2 up to a max of
-+ *ANSSIZP2 bytes, with the actual response length stored in
-+ *RESPLEN2. If more than *ANSSIZP bytes are needed and ANSP2
-+ is non-NULL (required for a second query) then malloc is used to
-+ allocate a new response buffer, *ANSSIZP2 is set to the new buffer
-+ size and *ANSP2_MALLOCED is set to 1.
-+
-+ The ANSP2_MALLOCED argument will eventually be removed as the
-+ change in buffer pointer can be used to detect the buffer has
-+ changed and that the caller should use free on the new buffer.
-+
-+ Note that the answers may arrive in any order from the server and
-+ therefore the first and second answer buffers may not correspond to
-+ the first and second queries.
-+
-+ It is not supported to call this function with a non-NULL ANSP2
-+ but a NULL ANSCP. Put another way, you can call send_vc with a
-+ single unmodifiable buffer or two modifiable buffers, but no other
-+ combination is supported.
-+
-+ It is the caller's responsibility to free the malloc allocated
-+ buffers by detecting that the pointers have changed from their
-+ original values i.e. *ANSCP or *ANSP2 has changed.
-+
-+ If an answer is truncated because of UDP datagram DNS limits then
-+ *V_CIRCUIT is set to 1 and the return value non-zero to indicate to
-+ the caller to retry with TCP. The value *GOTSOMEWHERE is set to 1
-+ if any progress was made reading a response from the nameserver and
-+ is used by the caller to distinguish between ECONNREFUSED and
-+ ETIMEDOUT (the latter if *GOTSOMEWHERE is 1).
-+
-+ If errors are encountered then *TERRNO is set to an appropriate
-+ errno value and a zero result is returned for a recoverable error,
-+ and a less-than zero result is returned for a non-recoverable error.
-+
-+ If no errors are encountered then *TERRNO is left unmodified and
-+ a the length of the first response in bytes is returned. */
- static int
- send_dg(res_state statp,
- const u_char *buf, int buflen, const u_char *buf2, int buflen2,
-@@ -1007,8 +1143,6 @@
- {
- const HEADER *hp = (HEADER *) buf;
- const HEADER *hp2 = (HEADER *) buf2;
-- u_char *ans = *ansp;
-- int orig_anssizp = *anssizp;
- struct timespec now, timeout, finish;
- struct pollfd pfd[1];
- int ptimeout;
-@@ -1041,6 +1175,8 @@
- int need_recompute = 0;
- int nwritten = 0;
- int recvresp1 = 0;
-+ /* Skip the second response if there is no second query.
-+ To do that we mark the second response as received. */
- int recvresp2 = buf2 == NULL;
- pfd[0].fd = EXT(statp).nssocks[ns];
- pfd[0].events = POLLOUT;
-@@ -1204,55 +1340,56 @@
- int *thisresplenp;
-
- if ((recvresp1 | recvresp2) == 0 || buf2 == NULL) {
-+ /* We have not received any responses
-+ yet or we only have one response to
-+ receive. */
- thisanssizp = anssizp;
- thisansp = anscp ?: ansp;
- assert (anscp != NULL || ansp2 == NULL);
- thisresplenp = &resplen;
- } else {
-- if (*anssizp != MAXPACKET) {
-- /* No buffer allocated for the first
-- reply. We can try to use the rest
-- of the user-provided buffer. */
--#ifdef _STRING_ARCH_unaligned
-- *anssizp2 = orig_anssizp - resplen;
-- *ansp2 = *ansp + resplen;
--#else
-- int aligned_resplen
-- = ((resplen + __alignof__ (HEADER) - 1)
-- & ~(__alignof__ (HEADER) - 1));
-- *anssizp2 = orig_anssizp - aligned_resplen;
-- *ansp2 = *ansp + aligned_resplen;
--#endif
-- } else {
-- /* The first reply did not fit into the
-- user-provided buffer. Maybe the second
-- answer will. */
-- *anssizp2 = orig_anssizp;
-- *ansp2 = *ansp;
-- }
--
- thisanssizp = anssizp2;
- thisansp = ansp2;
- thisresplenp = resplen2;
- }
-
- if (*thisanssizp < MAXPACKET
-- /* Yes, we test ANSCP here. If we have two buffers
-- both will be allocatable. */
-- && anscp
-+ /* If the current buffer is non-NULL and it's not
-+ pointing at the static user-supplied buffer then
-+ we can reallocate it. */
-+ && (thisansp != NULL && thisansp != ansp)
- #ifdef FIONREAD
-+ /* Is the size too small? */
- && (ioctl (pfd[0].fd, FIONREAD, thisresplenp) < 0
- || *thisanssizp < *thisresplenp)
- #endif
- ) {
-+ /* Always allocate MAXPACKET, callers expect
-+ this specific size. */
- u_char *newp = malloc (MAXPACKET);
- if (newp != NULL) {
-- *anssizp = MAXPACKET;
-- *thisansp = ans = newp;
-+ *thisanssizp = MAXPACKET;
-+ *thisansp = newp;
- if (thisansp == ansp2)
- *ansp2_malloced = 1;
- }
- }
-+ /* We could end up with truncation if anscp was NULL
-+ (not allowed to change caller's buffer) and the
-+ response buffer size is too small. This isn't a
-+ reliable way to detect truncation because the ioctl
-+ may be an inaccurate report of the UDP message size.
-+ Therefore we use this only to issue debug output.
-+ To do truncation accurately with UDP we need
-+ MSG_TRUNC which is only available on Linux. We
-+ can abstract out the Linux-specific feature in the
-+ future to detect truncation. */
-+ if (__glibc_unlikely (*thisanssizp < *thisresplenp)) {
-+ Dprint(statp->options & RES_DEBUG,
-+ (stdout, ";; response may be truncated (UDP)\n")
-+ );
-+ }
-+
- HEADER *anhp = (HEADER *) *thisansp;
- socklen_t fromlen = sizeof(struct sockaddr_in6);
- assert (sizeof(from) <= fromlen);
diff --git a/debian/patches/git-updates.diff b/debian/patches/git-updates.diff
index 1a24dd0..b77210d 100644
--- a/debian/patches/git-updates.diff
+++ b/debian/patches/git-updates.diff
@@ -1,10 +1,118 @@
GIT update of git://sourceware.org/git/glibc.git/release/2.19/master from
glibc-2.19
diff --git a/ChangeLog b/ChangeLog
-index 81c393a..9907019 100644
+index 81c393a..f9a9e33 100644
--- a/ChangeLog
+++ b/ChangeLog
-@@ -1,3 +1,443 @@
+@@ -1,3 +1,551 @@
++2016-03-25 Florian Weimer <fwei...@redhat.com>
++
++ [BZ #19791]
++ * resolv/res_send.c (close_and_return_error): New function.
++ (send_dg): Initialize *resplen2 after reopen failure. Call
++ close_and_return_error for error returns. On error paths without
++ __res_iclose, initialze *resplen2 explicitly. Update comment for
++ successful return.
++
++2016-02-15 Carlos O'Donell <car...@redhat.com>
++
++ [BZ #18665]
++ * resolv/nss_dns/dns-host.c (gaih_getanswer_slice): Always set
++ *herrno_p.
++ (gaih_getanswer): Document functional behviour. Return tryagain
++ if any result is tryagain.
++ * resolv/res_query.c (__libc_res_nsearch): Set buffer size to zero
++ when freed.
++ * resolv/res_send.c: Add copyright text.
++ (__libc_res_nsend): Document that MAXPACKET is expected.
++ (send_vc): Document. Remove buffer reuse.
++ (send_dg): Document. Remove buffer reuse. Set *thisanssizp to set the
++ size of the buffer. Add Dprint for truncated UDP buffer.
++
++2016-04-29 Florian Weimer <fwei...@redhat.com>
++
++ [BZ #20010]
++ CVE-2016-3706
++ * sysdeps/posix/getaddrinfo.c
++ (convert_hostent_to_gaih_addrtuple): New function.
++ (gethosts): Call convert_hostent_to_gaih_addrtuple.
++ (gaih_inet): Use convert_hostent_to_gaih_addrtuple to convert
++ AF_INET data.
++
++2016-05-04 Florian Weimer <fwei...@redhat.com>
++
++ [BZ #19779]
++ CVE-2016-1234
++ Avoid copying names of directory entries.
++ * posix/glob.c (DIRENT_MUST_BE, DIRENT_MIGHT_BE_SYMLINK)
++ (DIRENT_MIGHT_BE_DIR, CONVERT_D_INO, CONVERT_D_TYPE)
++ (CONVERT_DIRENT_DIRENT64, REAL_DIR_ENTRY): Remove macros.
++ (struct readdir_result): New type.
++ (D_TYPE_TO_RESULT, D_INO_TO_RESULT, READDIR_RESULT_INITIALIZER)
++ (GL_READDIR): New macros.
++ (readdir_result_might_be_symlink, readdir_result_might_be_dir)
++ (convert_dirent, convert_dirent64): New functions.
++ (glob_in_dir): Use struct readdir_result. Call convert_dirent or
++ convert_dirent64. Adjust references to the readdir result.
++ * sysdeps/unix/sysv/linux/i386/glob64.c:
++ (convert_dirent, GL_READDIR): Redefine for second file inclusion.
++ * posix/bug-glob2.c (LONG_NAME): Define.
++ (filesystem): Add LONG_NAME.
++ (my_DIR): Increase the size of room_for_dirent.
++
++2016-04-29 Florian Weimer <fwei...@redhat.com>
++
++ glob: Simplify and document the interface for the GLOB_ALTDIRFUNC
++ callback function gl_readdir.
++ * posix/glob.c (NAMELEN, CONVERT_D_NAMLEN): Remove.
++ (CONVERT_DIRENT_DIRENT64): Use strcpy instead of memcpy.
++ (glob_in_dir): Remove len. Use strdup instead of malloc and
++ memcpy to copy the name.
++ * manual/pattern.texi (Calling Glob): Document requirements for
++ implementations of the gl_readdir callback function.
++ * manual/examples/mkdirent.c: New example.
++ * posix/bug-glob2.c (my_readdir): Set d_ino to 1 unconditionally,
++ per the manual guidance.
++ * posix/tst-gnuglob.c (my_readdir): Likewise.
++
++2016-04-28 Stefan Liebler <s...@linux.vnet.ibm.com>
++
++ [BZ #18508]
++ * stdlib/Makefile ($(objpfx)tst-makecontext3):
++ Depend on $(libdl).
++ * stdlib/tst-makecontext.c (cf): Test if _Unwind_Backtrace
++ is not called infinitely times.
++ (backtrace_helper): New function.
++ (trace_arg): New struct.
++ (st1): Enlarge stack size.
++ * sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:
++ (__makecontext_ret): Omit cfi_startproc and cfi_endproc.
++ * sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S:
++ Likewise.
++
++2016-04-28 Stefan Liebler <s...@linux.vnet.ibm.com>
++
++ [BZ #18080]
++ * sysdeps/unix/sysv/linux/s390/s390-32/setcontext.S
++ (__setcontext): Use SIG_SETMASK instead of SIG_BLOCK.
++ * sysdeps/unix/sysv/linux/s390/s390-64/setcontext.S
++ (__setcontext): Likewise.
++ * sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S
++ (__swapcontext): Use SIG_SETMASK instead of SIG_BLOCK.
++ Call rt_sigprocmask syscall one time to set new signal mask
++ and retrieve the current signal mask instead of two calls.
++ * sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S
++ (__swapcontext): Likewise.
++ * stdlib/Makefile (tests): Add new testcase tst-setcontext2.
++ * stdlib/tst-setcontext2.c: New file.
++
++2016-04-01 Florian Weimer <fwei...@redhat.com>
++
++ [BZ #19879]
++ CVE-2016-3075
++ * resolv/nss_dns/dns-network.c (_nss_dns_getnetbyname_r): Do not
++ copy name.
++
+2016-02-12 Florian Weimer <fwei...@redhat.com>
+
+ * misc/bug18240.c (do_test): Set RLIMIT_AS.
@@ -449,10 +557,10 @@ index 81c393a..9907019 100644
[BZ #16529]
diff --git a/NEWS b/NEWS
-index 98b479e..0d1952c 100644
+index 98b479e..d14f9ed 100644
--- a/NEWS
+++ b/NEWS
-@@ -5,6 +5,65 @@ See the end for copying conditions.
+@@ -5,6 +5,94 @@ See the end for copying conditions.
Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
using `glibc' in the "product" field.
@@ -463,7 +571,8 @@ index 98b479e..0d1952c 100644
+ 15946, 16545, 16574, 16623, 16657, 16695, 16743, 16758, 16759, 16760,
+ 16878, 16882, 16885, 16916, 16932, 16943, 16958, 17048, 17062, 17069,
+ 17079, 17137, 17153, 17213, 17263, 17269, 17325, 17555, 17905, 18007,
-+ 18032, 18240, 18287, 18905.
++ 18032, 18080, 18240, 18287, 18508, 18665, 18905, 19779, 19791, 19879,
++ 20010.
+
+* A buffer overflow in gethostbyname_r and related functions performing DNS
+ requests has been fixed. If the NSS functions were called with a
@@ -514,6 +623,34 @@ index 98b479e..0d1952c 100644
+ the get*ent functions if any of the query functions for the same database
+ are used during the iteration, causing a denial-of-service condition in
+ some applications.
++
++* The getnetbyname implementation in nss_dns had a potentially unbounded
++ alloca call (in the form of a call to strdupa), leading to a stack
++ overflow (stack exhaustion) and a crash if getnetbyname is invoked
++ on a very long name. (CVE-2016-3075)
++
++* The glob function suffered from a stack-based buffer overflow when it was
++ called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
++ Reported by Alexander Cherepanov. (CVE-2016-1234)
++
++* Previously, getaddrinfo copied large amounts of address data to the stack,
++ even after the fix for CVE-2013-4458 has been applied, potentially
++ resulting in a stack overflow. getaddrinfo now uses a heap allocation
++ instead. Reported by Michael Petlan. (CVE-2016-3706)
++
++* A stack-based buffer overflow was found in libresolv when invoked from
++ libnss_dns, allowing specially crafted DNS responses to seize control
++ of execution flow in the DNS client. The buffer overflow occurs in
++ the functions send_dg (send datagram) and send_vc (send TCP) for the
++ NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
++ family. The use of AF_UNSPEC triggers the low-level resolver code to
++ send out two parallel queries for A and AAAA. A mismanagement of the
++ buffers used for those queries could result in the response of a query
++ writing beyond the alloca allocated buffer created by
++ _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
++ the overflow. Thanks to the Google Security Team and Red Hat for
++ reporting the security impact of this issue, and Robert Holiday of
++ Ciena for reporting the related bug 18665. (CVE-2015-7547)
+
Version 2.19
@@ -1639,6 +1776,9 @@ index 0000000..e3b21a9
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
+diff --git a/manual/examples/mkdirent.c b/manual/examples/mkdirent.c
+new file mode 100644
+index 0000000..f8400f4
diff --git a/misc/Makefile b/misc/Makefile
index b039182..ad9e921 100644
--- a/misc/Makefile
@@ -2759,6 +2899,54 @@ index 6709900..8f6e6b5 100644
tst-vfork3-ENV = MALLOC_TRACE=$(objpfx)tst-vfork3.mtrace
$(objpfx)tst-vfork3-mem: $(objpfx)tst-vfork3.out
+diff --git a/posix/bug-glob2.c b/posix/bug-glob2.c
+index 8e21deb..3f9c620 100644
+--- a/posix/bug-glob2.c
++++ b/posix/bug-glob2.c
+@@ -40,6 +40,17 @@
+ # define PRINTF(fmt, args...)
+ #endif
+
++#define LONG_NAME \
++ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
++ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
++ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
++ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
++ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
++ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
++ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
++ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
++ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
++ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+
+ static struct
+ {
+@@ -58,6 +69,7 @@ static struct
+ { ".", 3, DT_DIR, 0755 },
+ { "..", 3, DT_DIR, 0755 },
+ { "a", 3, DT_REG, 0644 },
++ { LONG_NAME, 3, DT_REG, 0644 },
+ { "unreadable", 2, DT_DIR, 0111 },
+ { ".", 3, DT_DIR, 0111 },
+ { "..", 3, DT_DIR, 0755 },
+@@ -75,7 +87,7 @@ typedef struct
+ int level;
+ int idx;
+ struct dirent d;
+- char room_for_dirent[NAME_MAX];
++ char room_for_dirent[sizeof (LONG_NAME)];
+ } my_DIR;
+
+
+@@ -193,7 +205,7 @@ my_readdir (void *gdir)
+ return NULL;
+ }
+
+- dir->d.d_ino = dir->idx;
++ dir->d.d_ino = 1; /* glob should not skip this entry. */
+
+ #ifdef _DIRENT_HAVE_D_TYPE
+ dir->d.d_type = filesystem[dir->idx].type;
diff --git a/posix/bug-regex36.c b/posix/bug-regex36.c
new file mode 100644
index 0000000..59e2b6d
@@ -2854,6 +3042,316 @@ index f79d051..733cccb 100644
if (not)
return FNM_NOMATCH;
}
+diff --git a/posix/glob.c b/posix/glob.c
+index f143108..ae3b8b7 100644
+--- a/posix/glob.c
++++ b/posix/glob.c
+@@ -24,7 +24,9 @@
+ #include <errno.h>
+ #include <sys/types.h>
+ #include <sys/stat.h>
++#include <stdbool.h>
+ #include <stddef.h>
++#include <stdint.h>
+
+ /* Outcomment the following line for production quality code. */
+ /* #define NDEBUG 1 */
+@@ -57,10 +59,8 @@
+
+ #if defined HAVE_DIRENT_H || defined __GNU_LIBRARY__
+ # include <dirent.h>
+-# define NAMLEN(dirent) strlen((dirent)->d_name)
+ #else
+ # define dirent direct
+-# define NAMLEN(dirent) (dirent)->d_namlen
+ # ifdef HAVE_SYS_NDIR_H
+ # include <sys/ndir.h>
+ # endif
+@@ -75,82 +75,8 @@
+ # endif /* HAVE_VMSDIR_H */
+ #endif
+
+-
+-/* In GNU systems, <dirent.h> defines this macro for us. */
+-#ifdef _D_NAMLEN
+-# undef NAMLEN
+-# define NAMLEN(d) _D_NAMLEN(d)
+-#endif
+-
+-/* When used in the GNU libc the symbol _DIRENT_HAVE_D_TYPE is available
+- if the `d_type' member for `struct dirent' is available.
+- HAVE_STRUCT_DIRENT_D_TYPE plays the same role in GNULIB. */
+-#if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE
+-/* True if the directory entry D must be of type T. */
+-# define DIRENT_MUST_BE(d, t) ((d)->d_type == (t))
+-
+-/* True if the directory entry D might be a symbolic link. */
+-# define DIRENT_MIGHT_BE_SYMLINK(d) \
+- ((d)->d_type == DT_UNKNOWN || (d)->d_type == DT_LNK)
+-
+-/* True if the directory entry D might be a directory. */
+-# define DIRENT_MIGHT_BE_DIR(d) \
+- ((d)->d_type == DT_DIR || DIRENT_MIGHT_BE_SYMLINK (d))
+-
+-#else /* !HAVE_D_TYPE */
+-# define DIRENT_MUST_BE(d, t) false
+-# define DIRENT_MIGHT_BE_SYMLINK(d) true
+-# define DIRENT_MIGHT_BE_DIR(d) true
+-#endif /* HAVE_D_TYPE */
+-
+-/* If the system has the `struct dirent64' type we use it internally. */
+-#if defined _LIBC && !defined COMPILE_GLOB64
+-# if defined HAVE_DIRENT_H || defined __GNU_LIBRARY__
+-# define CONVERT_D_NAMLEN(d64, d32)
+-# else
+-# define CONVERT_D_NAMLEN(d64, d32) \
+- (d64)->d_namlen = (d32)->d_namlen;
+-# endif
+-
+-# if (defined POSIX || defined WINDOWS32) && !defined __GNU_LIBRARY__
+-# define CONVERT_D_INO(d64, d32)
+-# else
+-# define CONVERT_D_INO(d64, d32) \
+- (d64)->d_ino = (d32)->d_ino;
+-# endif
+-
+-# ifdef _DIRENT_HAVE_D_TYPE
+-# define CONVERT_D_TYPE(d64, d32) \
+- (d64)->d_type = (d32)->d_type;
+-# else
+-# define CONVERT_D_TYPE(d64, d32)
+-# endif
+-
+-# define CONVERT_DIRENT_DIRENT64(d64, d32) \
+- memcpy ((d64)->d_name, (d32)->d_name, NAMLEN (d32) + 1); \
+- CONVERT_D_NAMLEN (d64, d32) \
+- CONVERT_D_INO (d64, d32) \
+- CONVERT_D_TYPE (d64, d32)
+-#endif
+-
+-
+-#if (defined POSIX || defined WINDOWS32) && !defined __GNU_LIBRARY__
+-/* Posix does not require that the d_ino field be present, and some
+- systems do not provide it. */
+-# define REAL_DIR_ENTRY(dp) 1
+-#else
+-# define REAL_DIR_ENTRY(dp) (dp->d_ino != 0)
+-#endif /* POSIX */
+-
+ #include <stdlib.h>
+ #include <string.h>
+-
+-/* NAME_MAX is usually defined in <dirent.h> or <limits.h>. */
+-#include <limits.h>
+-#ifndef NAME_MAX
+-# define NAME_MAX (sizeof (((struct dirent *) 0)->d_name))
+-#endif
+-
+ #include <alloca.h>
+
+ #ifdef _LIBC
+@@ -195,8 +121,111 @@
+
+ static const char *next_brace_sub (const char *begin, int flags) __THROWNL;
+
++/* A representation of a directory entry which does not depend on the
++ layout of struct dirent, or the size of ino_t. */
++struct readdir_result
++{
++ const char *name;
++# if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE
++ uint8_t type;
++# endif
++ bool skip_entry;
++};
++
++# if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE
++/* Initializer based on the d_type member of struct dirent. */
++# define D_TYPE_TO_RESULT(source) (source)->d_type,
++
++/* True if the directory entry D might be a symbolic link. */
++static bool
++readdir_result_might_be_symlink (struct readdir_result d)
++{
++ return d.type == DT_UNKNOWN || d.type == DT_LNK;
++}
++
++/* True if the directory entry D might be a directory. */
++static bool
++readdir_result_might_be_dir (struct readdir_result d)
++{
++ return d.type == DT_DIR || readdir_result_might_be_symlink (d);
++}
++# else /* defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE */
++# define D_TYPE_TO_RESULT(source)
++
++/* If we do not have type information, symbolic links and directories
++ are always a possibility. */
++
++static bool
++readdir_result_might_be_symlink (struct readdir_result d)
++{
++ return true;
++}
++
++static bool
++readdir_result_might_be_dir (struct readdir_result d)
++{
++ return true;
++}
++
++# endif /* defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE */
++
++# if (defined POSIX || defined WINDOWS32) && !defined __GNU_LIBRARY__
++/* Initializer for skip_entry. POSIX does not require that the d_ino
++ field be present, and some systems do not provide it. */
++# define D_INO_TO_RESULT(source) false,
++# else
++# define D_INO_TO_RESULT(source) (source)->d_ino == 0,
++# endif
++
++/* Construct an initializer for a struct readdir_result object from a
++ struct dirent *. No copy of the name is made. */
++#define READDIR_RESULT_INITIALIZER(source) \
++ { \
++ source->d_name, \
++ D_TYPE_TO_RESULT (source) \
++ D_INO_TO_RESULT (source) \
++ }
++
+ #endif /* !defined _LIBC || !defined GLOB_ONLY_P */
+
++/* Call gl_readdir on STREAM. This macro can be overridden to reduce
++ type safety if an old interface version needs to be supported. */
++#ifndef GL_READDIR
++# define GL_READDIR(pglob, stream) ((pglob)->gl_readdir (stream))
++#endif
++
++/* Extract name and type from directory entry. No copy of the name is
++ made. If SOURCE is NULL, result name is NULL. Keep in sync with
++ convert_dirent64 below. */
++static struct readdir_result
++convert_dirent (const struct dirent *source)
++{
++ if (source == NULL)
++ {
++ struct readdir_result result = { NULL, };
++ return result;
++ }
++ struct readdir_result result = READDIR_RESULT_INITIALIZER (source);
++ return result;
++}
++
++#ifndef COMPILE_GLOB64
++/* Like convert_dirent, but works on struct dirent64 instead. Keep in
++ sync with convert_dirent above. */
++static struct readdir_result
++convert_dirent64 (const struct dirent64 *source)
++{
++ if (source == NULL)
++ {
++ struct readdir_result result = { NULL, };
++ return result;
++ }
++ struct readdir_result result = READDIR_RESULT_INITIALIZER (source);
++ return result;
++}
++#endif
++
++
+ #ifndef attribute_hidden
+ # define attribute_hidden
+ #endif
+@@ -1561,56 +1590,36 @@ glob_in_dir (const char *pattern, const char
*directory, int flags,
+
+ while (1)
+ {
+- const char *name;
+- size_t len;
+-#if defined _LIBC && !defined COMPILE_GLOB64
+- struct dirent64 *d;
+- union
+- {
+- struct dirent64 d64;
+- char room [offsetof (struct dirent64, d_name[0])
+- + NAME_MAX + 1];
+- }
+- d64buf;
+-
+- if (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0))
+- {
+- struct dirent *d32 = (*pglob->gl_readdir) (stream);
+- if (d32 != NULL)
+- {
+- CONVERT_DIRENT_DIRENT64 (&d64buf.d64, d32);
+- d = &d64buf.d64;
+- }
+- else
+- d = NULL;
+- }
+- else
+- d = __readdir64 (stream);
++ struct readdir_result d;
++ {
++ if (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0))
++ d = convert_dirent (GL_READDIR (pglob, stream));
++ else
++ {
++#ifdef COMPILE_GLOB64
++ d = convert_dirent (__readdir (stream));
+ #else
+- struct dirent *d = (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
+- ? ((struct dirent *)
+- (*pglob->gl_readdir) (stream))
+- : __readdir (stream));
++ d = convert_dirent64 (__readdir64 (stream));
+ #endif
+- if (d == NULL)
++ }
++ }
++ if (d.name == NULL)
+ break;
+- if (! REAL_DIR_ENTRY (d))
++ if (d.skip_entry)
+ continue;
+
+ /* If we shall match only directories use the information
+ provided by the dirent call if possible. */
+- if ((flags & GLOB_ONLYDIR) && !DIRENT_MIGHT_BE_DIR (d))
++ if ((flags & GLOB_ONLYDIR) && !readdir_result_might_be_dir (d))
+ continue;
+
+- name = d->d_name;
+-
+- if (fnmatch (pattern, name, fnm_flags) == 0)
++ if (fnmatch (pattern, d.name, fnm_flags) == 0)
+ {
+ /* If the file we found is a symlink we have to
+ make sure the target file exists. */
+- if (!DIRENT_MIGHT_BE_SYMLINK (d)
+- || link_exists_p (dfd, directory, dirlen, name, pglob,
+- flags))
++ if (!readdir_result_might_be_symlink (d)
++ || link_exists_p (dfd, directory, dirlen, d.name,
++ pglob, flags))
+ {
+ if (cur == names->count)
+ {
+@@ -1630,12 +1639,10 @@ glob_in_dir (const char *pattern, const char
*directory, int flags,
+ names = newnames;
+ cur = 0;
+ }
+- len = NAMLEN (d);
+- names->name[cur] = (char *) malloc (len + 1);
++ names->name[cur] = strdup (d.name);
+ if (names->name[cur] == NULL)
+ goto memory_error;
+- *((char *) mempcpy (names->name[cur++], name, len))
+- = '\0';
++ ++cur;
+ ++nfound;
+ }
+ }
diff --git a/posix/regcomp.c b/posix/regcomp.c
index 921d0f4..076eca3 100644
--- a/posix/regcomp.c
@@ -3021,6 +3519,19 @@ index 0000000..2a83c1b
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
+diff --git a/posix/tst-gnuglob.c b/posix/tst-gnuglob.c
+index 1c72357..48c7527 100644
+--- a/posix/tst-gnuglob.c
++++ b/posix/tst-gnuglob.c
+@@ -211,7 +211,7 @@ my_readdir (void *gdir)
+ return NULL;
+ }
+
+- dir->d.d_ino = dir->idx;
++ dir->d.d_ino = 1; /* glob should not skip this entry. */
+
+ #ifdef _DIRENT_HAVE_D_TYPE
+ dir->d.d_type = filesystem[dir->idx].type;
diff --git a/posix/tst-spawn.c b/posix/tst-spawn.c
index 84cecf2..6cd874a 100644
--- a/posix/tst-spawn.c
@@ -3100,7 +3611,7 @@ index a9db232..e8c112c 100644
{
/* We need to decode the response. Just one question record.
diff --git a/resolv/nss_dns/dns-host.c b/resolv/nss_dns/dns-host.c
-index f8f192e..f36d28b 100644
+index f8f192e..63029d9 100644
--- a/resolv/nss_dns/dns-host.c
+++ b/resolv/nss_dns/dns-host.c
@@ -190,7 +190,7 @@ _nss_dns_gethostbyname3_r (const char *name, int af,
struct hostent *result,
@@ -3200,20 +3711,178 @@ index f8f192e..f36d28b 100644
{
/* The buffer is too small. */
too_small:
+@@ -1049,7 +1052,10 @@ gaih_getanswer_slice (const querybuf *answer, int
anslen, const char *qname,
+ int h_namelen = 0;
+
+ if (ancount == 0)
+- return NSS_STATUS_NOTFOUND;
++ {
++ *h_errnop = HOST_NOT_FOUND;
++ return NSS_STATUS_NOTFOUND;
++ }
+
+ while (ancount-- > 0 && cp < end_of_message && had_error == 0)
+ {
+@@ -1226,7 +1232,14 @@ gaih_getanswer_slice (const querybuf *answer, int
anslen, const char *qname,
+ /* Special case here: if the resolver sent a result but it only
+ contains a CNAME while we are looking for a T_A or T_AAAA record,
+ we fail with NOTFOUND instead of TRYAGAIN. */
+- return canon == NULL ? NSS_STATUS_TRYAGAIN : NSS_STATUS_NOTFOUND;
++ if (canon != NULL)
++ {
++ *h_errnop = HOST_NOT_FOUND;
++ return NSS_STATUS_NOTFOUND;
++ }
++
++ *h_errnop = NETDB_INTERNAL;
++ return NSS_STATUS_TRYAGAIN;
+ }
+
+
+@@ -1240,11 +1253,101 @@ gaih_getanswer (const querybuf *answer1, int anslen1,
const querybuf *answer2,
+
+ enum nss_status status = NSS_STATUS_NOTFOUND;
+
++ /* Combining the NSS status of two distinct queries requires some
++ compromise and attention to symmetry (A or AAAA queries can be
++ returned in any order). What follows is a breakdown of how this
++ code is expected to work and why. We discuss only SUCCESS,
++ TRYAGAIN, NOTFOUND and UNAVAIL, since they are the only returns
++ that apply (though RETURN and MERGE exist). We make a distinction
++ between TRYAGAIN (recoverable) and TRYAGAIN' (not-recoverable).
++ A recoverable TRYAGAIN is almost always due to buffer size issues
++ and returns ERANGE in errno and the caller is expected to retry
++ with a larger buffer.
++
++ Lastly, you may be tempted to make significant changes to the
++ conditions in this code to bring about symmetry between responses.
++ Please don't change anything without due consideration for
++ expected application behaviour. Some of the synthesized responses
++ aren't very well thought out and sometimes appear to imply that
++ IPv4 responses are always answer 1, and IPv6 responses are always
++ answer 2, but that's not true (see the implementation of send_dg
++ and send_vc to see response can arrive in any order, particularly
++ for UDP). However, we expect it holds roughly enough of the time
++ that this code works, but certainly needs to be fixed to make this
++ a more robust implementation.
++
++ ----------------------------------------------
++ | Answer 1 Status / | Synthesized | Reason |
++ | Answer 2 Status | Status | |
++ |--------------------------------------------|
++ | SUCCESS/SUCCESS | SUCCESS | [1] |
++ | SUCCESS/TRYAGAIN | TRYAGAIN | [5] |
++ | SUCCESS/TRYAGAIN' | SUCCESS | [1] |
++ | SUCCESS/NOTFOUND | SUCCESS | [1] |
++ | SUCCESS/UNAVAIL | SUCCESS | [1] |
++ | TRYAGAIN/SUCCESS | TRYAGAIN | [2] |
++ | TRYAGAIN/TRYAGAIN | TRYAGAIN | [2] |
++ | TRYAGAIN/TRYAGAIN' | TRYAGAIN | [2] |
++ | TRYAGAIN/NOTFOUND | TRYAGAIN | [2] |
++ | TRYAGAIN/UNAVAIL | TRYAGAIN | [2] |
++ | TRYAGAIN'/SUCCESS | SUCCESS | [3] |
++ | TRYAGAIN'/TRYAGAIN | TRYAGAIN | [3] |
++ | TRYAGAIN'/TRYAGAIN' | TRYAGAIN' | [3] |
++ | TRYAGAIN'/NOTFOUND | TRYAGAIN' | [3] |
++ | TRYAGAIN'/UNAVAIL | UNAVAIL | [3] |
++ | NOTFOUND/SUCCESS | SUCCESS | [3] |
++ | NOTFOUND/TRYAGAIN | TRYAGAIN | [3] |
++ | NOTFOUND/TRYAGAIN' | TRYAGAIN' | [3] |
++ | NOTFOUND/NOTFOUND | NOTFOUND | [3] |
++ | NOTFOUND/UNAVAIL | UNAVAIL | [3] |
++ | UNAVAIL/SUCCESS | UNAVAIL | [4] |
++ | UNAVAIL/TRYAGAIN | UNAVAIL | [4] |
++ | UNAVAIL/TRYAGAIN' | UNAVAIL | [4] |
++ | UNAVAIL/NOTFOUND | UNAVAIL | [4] |
++ | UNAVAIL/UNAVAIL | UNAVAIL | [4] |
++ ----------------------------------------------
++
++ [1] If the first response is a success we return success.
++ This ignores the state of the second answer and in fact
++ incorrectly sets errno and h_errno to that of the second
++ answer. However because the response is a success we ignore
++ *errnop and *h_errnop (though that means you touched errno on
++ success). We are being conservative here and returning the
++ likely IPv4 response in the first answer as a success.
++
++ [2] If the first response is a recoverable TRYAGAIN we return
++ that instead of looking at the second response. The
++ expectation here is that we have failed to get an IPv4 response
++ and should retry both queries.
++
++ [3] If the first response was not a SUCCESS and the second
++ response is not NOTFOUND (had a SUCCESS, need to TRYAGAIN,
++ or failed entirely e.g. TRYAGAIN' and UNAVAIL) then use the
++ result from the second response, otherwise the first responses
++ status is used. Again we have some odd side-effects when the
++ second response is NOTFOUND because we overwrite *errnop and
++ *h_errnop that means that a first answer of NOTFOUND might see
++ its *errnop and *h_errnop values altered. Whether it matters
++ in practice that a first response NOTFOUND has the wrong
++ *errnop and *h_errnop is undecided.
++
++ [4] If the first response is UNAVAIL we return that instead of
++ looking at the second response. The expectation here is that
++ it will have failed similarly e.g. configuration failure.
++
++ [5] Testing this code is complicated by the fact that truncated
++ second response buffers might be returned as SUCCESS if the
++ first answer is a SUCCESS. To fix this we add symmetry to
++ TRYAGAIN with the second response. If the second response
++ is a recoverable error we now return TRYAGIN even if the first
++ response was SUCCESS. */
++
+ if (anslen1 > 0)
+ status = gaih_getanswer_slice(answer1, anslen1, qname,
+ &pat, &buffer, &buflen,
+ errnop, h_errnop, ttlp,
+ &first);
++
+ if ((status == NSS_STATUS_SUCCESS || status == NSS_STATUS_NOTFOUND
+ || (status == NSS_STATUS_TRYAGAIN
+ /* We want to look at the second answer in case of an
+@@ -1260,8 +1363,15 @@ gaih_getanswer (const querybuf *answer1, int anslen1,
const querybuf *answer2,
+ &pat, &buffer, &buflen,
+ errnop, h_errnop, ttlp,
+ &first);
++ /* Use the second response status in some cases. */
+ if (status != NSS_STATUS_SUCCESS && status2 != NSS_STATUS_NOTFOUND)
+ status = status2;
++ /* Do not return a truncated second response (unless it was
++ unavoidable e.g. unrecoverable TRYAGAIN). */
++ if (status == NSS_STATUS_SUCCESS
++ && (status2 == NSS_STATUS_TRYAGAIN
++ && *errnop == ERANGE && *h_errnop != NO_RECOVERY))
++ status = NSS_STATUS_TRYAGAIN;
+ }
+
+ return status;
diff --git a/resolv/nss_dns/dns-network.c b/resolv/nss_dns/dns-network.c
-index 8e80a60..13ad38c 100644
+index 8e80a60..37de664 100644
--- a/resolv/nss_dns/dns-network.c
+++ b/resolv/nss_dns/dns-network.c
-@@ -129,7 +129,7 @@ _nss_dns_getnetbyname_r (const char *name, struct netent
*result,
+@@ -118,18 +118,15 @@ _nss_dns_getnetbyname_r (const char *name, struct netent
*result,
+ } net_buffer;
+ querybuf *orig_net_buffer;
+ int anslen;
+- char *qbuf;
+ enum nss_status status;
+
+ if (__res_maybe_init (&_res, 0) == -1)
+ return NSS_STATUS_UNAVAIL;
+
+- qbuf = strdupa (name);
+-
net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
- anslen = __libc_res_nsearch (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
+- anslen = __libc_res_nsearch (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
- 1024, &net_buffer.ptr, NULL, NULL, NULL);
++ anslen = __libc_res_nsearch (&_res, name, C_IN, T_PTR, net_buffer.buf->buf,
+ 1024, &net_buffer.ptr, NULL, NULL, NULL, NULL);
if (anslen < 0)
{
/* Nothing found. */
-@@ -205,7 +205,7 @@ _nss_dns_getnetbyaddr_r (uint32_t net, int type, struct
netent *result,
+@@ -205,7 +202,7 @@ _nss_dns_getnetbyaddr_r (uint32_t net, int type, struct
netent *result,
net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
anslen = __libc_res_nquery (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
@@ -3223,7 +3892,7 @@ index 8e80a60..13ad38c 100644
{
/* Nothing found. */
diff --git a/resolv/res_query.c b/resolv/res_query.c
-index 1325f97..c5c3402 100644
+index 1325f97..6f5280d 100644
--- a/resolv/res_query.c
+++ b/resolv/res_query.c
@@ -98,7 +98,7 @@ static int
@@ -3293,7 +3962,7 @@ index 1325f97..c5c3402 100644
if (ret > 0 || trailing_dot)
return (ret);
saved_herrno = h_errno;
-@@ -386,11 +390,11 @@ __libc_res_nsearch(res_state statp,
+@@ -386,11 +390,12 @@ __libc_res_nsearch(res_state statp,
answer = *answerp;
anslen = MAXPACKET;
}
@@ -3303,11 +3972,12 @@ index 1325f97..c5c3402 100644
{
free (*answerp2);
*answerp2 = NULL;
++ *nanswerp2 = 0;
+ *answerp2_malloced = 0;
}
}
-@@ -417,7 +421,7 @@ __libc_res_nsearch(res_state statp,
+@@ -417,7 +422,7 @@ __libc_res_nsearch(res_state statp,
class, type,
answer, anslen, answerp,
answerp2, nanswerp2,
@@ -3316,7 +3986,7 @@ index 1325f97..c5c3402 100644
if (ret > 0)
return (ret);
-@@ -425,12 +429,11 @@ __libc_res_nsearch(res_state statp,
+@@ -425,12 +430,12 @@ __libc_res_nsearch(res_state statp,
answer = *answerp;
anslen = MAXPACKET;
}
@@ -3327,11 +3997,12 @@ index 1325f97..c5c3402 100644
{
free (*answerp2);
*answerp2 = NULL;
++ *nanswerp2 = 0;
+ *answerp2_malloced = 0;
}
/*
-@@ -486,7 +489,8 @@ __libc_res_nsearch(res_state statp,
+@@ -486,7 +491,8 @@ __libc_res_nsearch(res_state statp,
&& !(tried_as_is || root_on_list)) {
ret = __libc_res_nquerydomain(statp, name, NULL, class, type,
answer, anslen, answerp,
@@ -3341,7 +4012,7 @@ index 1325f97..c5c3402 100644
if (ret > 0)
return (ret);
}
-@@ -498,10 +502,11 @@ __libc_res_nsearch(res_state statp,
+@@ -498,10 +504,12 @@ __libc_res_nsearch(res_state statp,
* else send back meaningless H_ERRNO, that being the one from
* the last DNSRCH we did.
*/
@@ -3350,11 +4021,12 @@ index 1325f97..c5c3402 100644
{
free (*answerp2);
*answerp2 = NULL;
++ *nanswerp2 = 0;
+ *answerp2_malloced = 0;
}
if (saved_herrno != -1)
RES_SET_H_ERRNO(statp, saved_herrno);
-@@ -521,7 +526,7 @@ res_nsearch(res_state statp,
+@@ -521,7 +529,7 @@ res_nsearch(res_state statp,
int anslen) /* size of answer */
{
return __libc_res_nsearch(statp, name, class, type, answer,
@@ -3363,7 +4035,7 @@ index 1325f97..c5c3402 100644
}
libresolv_hidden_def (res_nsearch)
-@@ -539,7 +544,8 @@ __libc_res_nquerydomain(res_state statp,
+@@ -539,7 +547,8 @@ __libc_res_nquerydomain(res_state statp,
u_char **answerp,
u_char **answerp2,
int *nanswerp2,
@@ -3373,7 +4045,7 @@ index 1325f97..c5c3402 100644
{
char nbuf[MAXDNAME];
const char *longname = nbuf;
-@@ -581,7 +587,7 @@ __libc_res_nquerydomain(res_state statp,
+@@ -581,7 +590,7 @@ __libc_res_nquerydomain(res_state statp,
}
return (__libc_res_nquery(statp, longname, class, type, answer,
anslen, answerp, answerp2, nanswerp2,
@@ -3382,7 +4054,7 @@ index 1325f97..c5c3402 100644
}
int
-@@ -593,7 +599,8 @@ res_nquerydomain(res_state statp,
+@@ -593,7 +602,8 @@ res_nquerydomain(res_state statp,
int anslen) /* size of answer */
{
return __libc_res_nquerydomain(statp, name, domain, class, type,
@@ -3393,10 +4065,31 @@ index 1325f97..c5c3402 100644
libresolv_hidden_def (res_nquerydomain)
diff --git a/resolv/res_send.c b/resolv/res_send.c
-index 7f2e85f..416da87 100644
+index 7f2e85f..11d0bbd 100644
--- a/resolv/res_send.c
+++ b/resolv/res_send.c
-@@ -186,12 +186,12 @@ evNowTime(struct timespec *res) {
+@@ -1,3 +1,20 @@
++/* Copyright (C) 2016 Free Software Foundation, Inc.
++ This file is part of the GNU C Library.
++
++ The GNU C Library is free software; you can redistribute it and/or
++ modify it under the terms of the GNU Lesser General Public
++ License as published by the Free Software Foundation; either
++ version 2.1 of the License, or (at your option) any later version.
++
++ The GNU C Library is distributed in the hope that it will be useful,
++ but WITHOUT ANY WARRANTY; without even the implied warranty of
++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ Lesser General Public License for more details.
++
++ You should have received a copy of the GNU Lesser General Public
++ License along with the GNU C Library; if not, see
++ <http://www.gnu.org/licenses/>. */
++
+ /*
+ * Copyright (c) 1985, 1989, 1993
+ * The Regents of the University of California. All rights reserved.
+@@ -186,12 +203,12 @@ evNowTime(struct timespec *res) {
static int send_vc(res_state, const u_char *, int,
const u_char *, int,
u_char **, int *, int *, int, u_char **,
@@ -3411,7 +4104,7 @@ index 7f2e85f..416da87 100644
#ifdef DEBUG
static void Aerror(const res_state, FILE *, const char *, int,
const struct sockaddr *);
-@@ -343,7 +343,7 @@ int
+@@ -343,7 +360,7 @@ int
__libc_res_nsend(res_state statp, const u_char *buf, int buflen,
const u_char *buf2, int buflen2,
u_char *ans, int anssiz, u_char **ansp, u_char **ansp2,
@@ -3420,7 +4113,16 @@ index 7f2e85f..416da87 100644
{
int gotsomewhere, terrno, try, v_circuit, resplen, ns, n;
-@@ -546,7 +546,8 @@ __libc_res_nsend(res_state statp, const u_char *buf, int
buflen,
+@@ -360,6 +377,8 @@ __libc_res_nsend(res_state statp, const u_char *buf, int
buflen,
+ #ifdef USE_HOOKS
+ if (__builtin_expect (statp->qhook || statp->rhook, 0)) {
+ if (anssiz < MAXPACKET && ansp) {
++ /* Always allocate MAXPACKET, callers expect
++ this specific size. */
+ u_char *buf = malloc (MAXPACKET);
+ if (buf == NULL)
+ return (-1);
+@@ -546,7 +565,8 @@ __libc_res_nsend(res_state statp, const u_char *buf, int
buflen,
try = statp->retry;
n = send_vc(statp, buf, buflen, buf2, buflen2,
&ans, &anssiz, &terrno,
@@ -3430,7 +4132,7 @@ index 7f2e85f..416da87 100644
if (n < 0)
return (-1);
if (n == 0 && (buf2 == NULL || *resplen2 == 0))
-@@ -556,7 +557,7 @@ __libc_res_nsend(res_state statp, const u_char *buf, int
buflen,
+@@ -556,7 +576,7 @@ __libc_res_nsend(res_state statp, const u_char *buf, int
buflen,
n = send_dg(statp, buf, buflen, buf2, buflen2,
&ans, &anssiz, &terrno,
ns, &v_circuit, &gotsomewhere, ansp,
@@ -3439,7 +4141,7 @@ index 7f2e85f..416da87 100644
if (n < 0)
return (-1);
if (n == 0 && (buf2 == NULL || *resplen2 == 0))
-@@ -646,7 +647,7 @@ res_nsend(res_state statp,
+@@ -646,26 +666,105 @@ res_nsend(res_state statp,
const u_char *buf, int buflen, u_char *ans, int anssiz)
{
return __libc_res_nsend(statp, buf, buflen, NULL, 0, ans, anssiz,
@@ -3448,7 +4150,93 @@ index 7f2e85f..416da87 100644
}
libresolv_hidden_def (res_nsend)
-@@ -657,7 +658,7 @@ send_vc(res_state statp,
+ /* Private */
+
++/* Close the resolver structure, assign zero to *RESPLEN2 if RESPLEN2
++ is not NULL, and return zero. */
++static int
++__attribute__ ((warn_unused_result))
++close_and_return_error (res_state statp, int *resplen2)
++{
++ __res_iclose(statp, false);
++ if (resplen2 != NULL)
++ *resplen2 = 0;
++ return 0;
++}
++
++/* The send_vc function is responsible for sending a DNS query over TCP
++ to the nameserver numbered NS from the res_state STATP i.e.
++ EXT(statp).nssocks[ns]. The function supports sending both IPv4 and
++ IPv6 queries at the same serially on the same socket.
++
++ Please note that for TCP there is no way to disable sending both
++ queries, unlike UDP, which honours RES_SNGLKUP and RES_SNGLKUPREOP
++ and sends the queries serially and waits for the result after each
++ sent query. This implemetnation should be corrected to honour these
++ options.
++
++ Please also note that for TCP we send both queries over the same
++ socket one after another. This technically violates best practice
++ since the server is allowed to read the first query, respond, and
++ then close the socket (to service another client). If the server
++ does this, then the remaining second query in the socket data buffer
++ will cause the server to send the client an RST which will arrive
++ asynchronously and the client's OS will likely tear down the socket
++ receive buffer resulting in a potentially short read and lost
++ response data. This will force the client to retry the query again,
++ and this process may repeat until all servers and connection resets
++ are exhausted and then the query will fail. It's not known if this
++ happens with any frequency in real DNS server implementations. This
++ implementation should be corrected to use two sockets by default for
++ parallel queries.
++
++ The query stored in BUF of BUFLEN length is sent first followed by
++ the query stored in BUF2 of BUFLEN2 length. Queries are sent
++ serially on the same socket.
++
++ Answers to the query are stored firstly in *ANSP up to a max of
++ *ANSSIZP bytes. If more than *ANSSIZP bytes are needed and ANSCP
++ is non-NULL (to indicate that modifying the answer buffer is allowed)
++ then malloc is used to allocate a new response buffer and ANSCP and
++ ANSP will both point to the new buffer. If more than *ANSSIZP bytes
++ are needed but ANSCP is NULL, then as much of the response as
++ possible is read into the buffer, but the results will be truncated.
++ When truncation happens because of a small answer buffer the DNS
++ packets header feild TC will bet set to 1, indicating a truncated
++ message and the rest of the socket data will be read and discarded.
++
++ Answers to the query are stored secondly in *ANSP2 up to a max of
++ *ANSSIZP2 bytes, with the actual response length stored in
++ *RESPLEN2. If more than *ANSSIZP bytes are needed and ANSP2
++ is non-NULL (required for a second query) then malloc is used to
++ allocate a new response buffer, *ANSSIZP2 is set to the new buffer
++ size and *ANSP2_MALLOCED is set to 1.
++
++ The ANSP2_MALLOCED argument will eventually be removed as the
++ change in buffer pointer can be used to detect the buffer has
++ changed and that the caller should use free on the new buffer.
++
++ Note that the answers may arrive in any order from the server and
++ therefore the first and second answer buffers may not correspond to
++ the first and second queries.
++
++ It is not supported to call this function with a non-NULL ANSP2
++ but a NULL ANSCP. Put another way, you can call send_vc with a
++ single unmodifiable buffer or two modifiable buffers, but no other
++ combination is supported.
++
++ It is the caller's responsibility to free the malloc allocated
++ buffers by detecting that the pointers have changed from their
++ original values i.e. *ANSCP or *ANSP2 has changed.
++
++ If errors are encountered then *TERRNO is set to an appropriate
++ errno value and a zero result is returned for a recoverable error,
++ and a less-than zero result is returned for a non-recoverable error.
++
++ If no errors are encountered then *TERRNO is left unmodified and
++ a the length of the first response in bytes is returned. */
+ static int
+ send_vc(res_state statp,
const u_char *buf, int buflen, const u_char *buf2, int buflen2,
u_char **ansp, int *anssizp,
int *terrno, int ns, u_char **anscp, u_char **ansp2, int *anssizp2,
@@ -3457,16 +4245,159 @@ index 7f2e85f..416da87 100644
{
const HEADER *hp = (HEADER *) buf;
const HEADER *hp2 = (HEADER *) buf2;
-@@ -823,6 +824,8 @@ send_vc(res_state statp,
+- u_char *ans = *ansp;
+- int orig_anssizp = *anssizp;
+- // XXX REMOVE
+- // int anssiz = *anssizp;
+- HEADER *anhp = (HEADER *) ans;
++ HEADER *anhp = (HEADER *) *ansp;
+ struct sockaddr_in6 *nsap = EXT(statp).nsaddrs[ns];
+ int truncating, connreset, resplen, n;
+ struct iovec iov[4];
+@@ -741,6 +840,8 @@ send_vc(res_state statp,
+ * Receive length & response
+ */
+ int recvresp1 = 0;
++ /* Skip the second response if there is no second query.
++ To do that we mark the second response as received. */
+ int recvresp2 = buf2 == NULL;
+ uint16_t rlen16;
+ read_len:
+@@ -777,33 +878,14 @@ send_vc(res_state statp,
+ u_char **thisansp;
+ int *thisresplenp;
+ if ((recvresp1 | recvresp2) == 0 || buf2 == NULL) {
++ /* We have not received any responses
++ yet or we only have one response to
++ receive. */
+ thisanssizp = anssizp;
+ thisansp = anscp ?: ansp;
+ assert (anscp != NULL || ansp2 == NULL);
+ thisresplenp = &resplen;
+ } else {
+- if (*anssizp != MAXPACKET) {
+- /* No buffer allocated for the first
+- reply. We can try to use the rest
+- of the user-provided buffer. */
+-#ifdef _STRING_ARCH_unaligned
+- *anssizp2 = orig_anssizp - resplen;
+- *ansp2 = *ansp + resplen;
+-#else
+- int aligned_resplen
+- = ((resplen + __alignof__ (HEADER) - 1)
+- & ~(__alignof__ (HEADER) - 1));
+- *anssizp2 = orig_anssizp - aligned_resplen;
+- *ansp2 = *ansp + aligned_resplen;
+-#endif
+- } else {
+- /* The first reply did not fit into the
+- user-provided buffer. Maybe the second
+- answer will. */
+- *anssizp2 = orig_anssizp;
+- *ansp2 = *ansp;
+- }
+-
+ thisanssizp = anssizp2;
+ thisansp = ansp2;
+ thisresplenp = resplen2;
+@@ -811,10 +893,14 @@ send_vc(res_state statp,
+ anhp = (HEADER *) *thisansp;
+
+ *thisresplenp = rlen;
+- if (rlen > *thisanssizp) {
+- /* Yes, we test ANSCP here. If we have two buffers
+- both will be allocatable. */
+- if (__builtin_expect (anscp != NULL, 1)) {
++ /* Is the answer buffer too small? */
++ if (*thisanssizp < rlen) {
++ /* If the current buffer is non-NULL and it's not
++ pointing at the static user-supplied buffer then
++ we can reallocate it. */
++ if (thisansp != NULL && thisansp != ansp) {
++ /* Always allocate MAXPACKET, callers expect
++ this specific size. */
+ u_char *newp = malloc (MAXPACKET);
+ if (newp == NULL) {
+ *terrno = ENOMEM;
+@@ -823,7 +909,12 @@ send_vc(res_state statp,
}
*thisanssizp = MAXPACKET;
*thisansp = newp;
+ if (thisansp == ansp2)
+ *ansp2_malloced = 1;
anhp = (HEADER *) newp;
++ /* A uint16_t can't be larger than MAXPACKET
++ thus it's safe to allocate MAXPACKET but
++ read RLEN bytes instead. */
len = rlen;
} else {
-@@ -992,7 +995,7 @@ send_dg(res_state statp,
+ Dprint(statp->options & RES_DEBUG,
+@@ -987,17 +1078,75 @@ reopen (res_state statp, int *terrno, int ns)
+ return 1;
+ }
+
++/* The send_dg function is responsible for sending a DNS query over UDP
++ to the nameserver numbered NS from the res_state STATP i.e.
++ EXT(statp).nssocks[ns]. The function supports IPv4 and IPv6 queries
++ along with the ability to send the query in parallel for both stacks
++ (default) or serially (RES_SINGLKUP). It also supports serial lookup
++ with a close and reopen of the socket used to talk to the server
++ (RES_SNGLKUPREOP) to work around broken name servers.
++
++ The query stored in BUF of BUFLEN length is sent first followed by
++ the query stored in BUF2 of BUFLEN2 length. Queries are sent
++ in parallel (default) or serially (RES_SINGLKUP or RES_SNGLKUPREOP).
++
++ Answers to the query are stored firstly in *ANSP up to a max of
++ *ANSSIZP bytes. If more than *ANSSIZP bytes are needed and ANSCP
++ is non-NULL (to indicate that modifying the answer buffer is allowed)
++ then malloc is used to allocate a new response buffer and ANSCP and
++ ANSP will both point to the new buffer. If more than *ANSSIZP bytes
++ are needed but ANSCP is NULL, then as much of the response as
++ possible is read into the buffer, but the results will be truncated.
++ When truncation happens because of a small answer buffer the DNS
++ packets header feild TC will bet set to 1, indicating a truncated
++ message, while the rest of the UDP packet is discarded.
++
++ Answers to the query are stored secondly in *ANSP2 up to a max of
++ *ANSSIZP2 bytes, with the actual response length stored in
++ *RESPLEN2. If more than *ANSSIZP bytes are needed and ANSP2
++ is non-NULL (required for a second query) then malloc is used to
++ allocate a new response buffer, *ANSSIZP2 is set to the new buffer
++ size and *ANSP2_MALLOCED is set to 1.
++
++ The ANSP2_MALLOCED argument will eventually be removed as the
++ change in buffer pointer can be used to detect the buffer has
++ changed and that the caller should use free on the new buffer.
++
++ Note that the answers may arrive in any order from the server and
++ therefore the first and second answer buffers may not correspond to
++ the first and second queries.
++
++ It is not supported to call this function with a non-NULL ANSP2
++ but a NULL ANSCP. Put another way, you can call send_vc with a
++ single unmodifiable buffer or two modifiable buffers, but no other
++ combination is supported.
++
++ It is the caller's responsibility to free the malloc allocated
++ buffers by detecting that the pointers have changed from their
++ original values i.e. *ANSCP or *ANSP2 has changed.
++
++ If an answer is truncated because of UDP datagram DNS limits then
++ *V_CIRCUIT is set to 1 and the return value non-zero to indicate to
++ the caller to retry with TCP. The value *GOTSOMEWHERE is set to 1
++ if any progress was made reading a response from the nameserver and
++ is used by the caller to distinguish between ECONNREFUSED and
++ ETIMEDOUT (the latter if *GOTSOMEWHERE is 1).
++
++ If errors are encountered then *TERRNO is set to an appropriate
++ errno value and a zero result is returned for a recoverable error,
++ and a less-than zero result is returned for a non-recoverable error.
++
++ If no errors are encountered then *TERRNO is left unmodified and
++ a the length of the first response in bytes is returned. */
+ static int
+ send_dg(res_state statp,
const u_char *buf, int buflen, const u_char *buf2, int buflen2,
u_char **ansp, int *anssizp,
int *terrno, int ns, int *v_circuit, int *gotsomewhere, u_char **anscp,
@@ -3475,23 +4406,574 @@ index 7f2e85f..416da87 100644
{
const HEADER *hp = (HEADER *) buf;
const HEADER *hp2 = (HEADER *) buf2;
-@@ -1238,6 +1241,8 @@ send_dg(res_state statp,
+- u_char *ans = *ansp;
+- int orig_anssizp = *anssizp;
+ struct timespec now, timeout, finish;
+ struct pollfd pfd[1];
+ int ptimeout;
+@@ -1022,7 +1171,11 @@ send_dg(res_state statp,
+ retry_reopen:
+ retval = reopen (statp, terrno, ns);
+ if (retval <= 0)
+- return retval;
++ {
++ if (resplen2 != NULL)
++ *resplen2 = 0;
++ return retval;
++ }
+ retry:
+ evNowTime(&now);
+ evConsTime(&timeout, seconds, 0);
+@@ -1030,11 +1183,11 @@ send_dg(res_state statp,
+ int need_recompute = 0;
+ int nwritten = 0;
+ int recvresp1 = 0;
++ /* Skip the second response if there is no second query.
++ To do that we mark the second response as received. */
+ int recvresp2 = buf2 == NULL;
+ pfd[0].fd = EXT(statp).nssocks[ns];
+ pfd[0].events = POLLOUT;
+- if (resplen2 != NULL)
+- *resplen2 = 0;
+ wait:
+ if (need_recompute) {
+ recompute_resend:
+@@ -1042,9 +1195,7 @@ send_dg(res_state statp,
+ if (evCmpTime(finish, now) <= 0) {
+ poll_err_out:
+ Perror(statp, stderr, "poll", errno);
+- err_out:
+- __res_iclose(statp, false);
+- return (0);
++ return close_and_return_error (statp, resplen2);
+ }
+ evSubTime(&timeout, &finish, &now);
+ need_recompute = 0;
+@@ -1091,7 +1242,9 @@ send_dg(res_state statp,
+ }
+
+ *gotsomewhere = 1;
+- return (0);
++ if (resplen2 != NULL)
++ *resplen2 = 0;
++ return 0;
+ }
+ if (n < 0) {
+ if (errno == EINTR)
+@@ -1159,7 +1312,7 @@ send_dg(res_state statp,
+
+ fail_sendmmsg:
+ Perror(statp, stderr, "sendmmsg", errno);
+- goto err_out;
++ return close_and_return_error (statp, resplen2);
+ }
+ }
+ else
+@@ -1177,7 +1330,7 @@ send_dg(res_state statp,
+ if (errno == EINTR || errno == EAGAIN)
+ goto recompute_resend;
+ Perror(statp, stderr, "send", errno);
+- goto err_out;
++ return close_and_return_error (statp, resplen2);
+ }
+ just_one:
+ if (nwritten != 0 || buf2 == NULL || single_request)
+@@ -1193,53 +1346,56 @@ send_dg(res_state statp,
+ int *thisresplenp;
+
+ if ((recvresp1 | recvresp2) == 0 || buf2 == NULL) {
++ /* We have not received any responses
++ yet or we only have one response to
++ receive. */
+ thisanssizp = anssizp;
+ thisansp = anscp ?: ansp;
+ assert (anscp != NULL || ansp2 == NULL);
+ thisresplenp = &resplen;
+ } else {
+- if (*anssizp != MAXPACKET) {
+- /* No buffer allocated for the first
+- reply. We can try to use the rest
+- of the user-provided buffer. */
+-#ifdef _STRING_ARCH_unaligned
+- *anssizp2 = orig_anssizp - resplen;
+- *ansp2 = *ansp + resplen;
+-#else
+- int aligned_resplen
+- = ((resplen + __alignof__ (HEADER) - 1)
+- & ~(__alignof__ (HEADER) - 1));
+- *anssizp2 = orig_anssizp - aligned_resplen;
+- *ansp2 = *ansp + aligned_resplen;
+-#endif
+- } else {
+- /* The first reply did not fit into the
+- user-provided buffer. Maybe the second
+- answer will. */
+- *anssizp2 = orig_anssizp;
+- *ansp2 = *ansp;
+- }
+-
+ thisanssizp = anssizp2;
+ thisansp = ansp2;
+ thisresplenp = resplen2;
+ }
+
+ if (*thisanssizp < MAXPACKET
+- /* Yes, we test ANSCP here. If we have two buffers
+- both will be allocatable. */
+- && anscp
++ /* If the current buffer is non-NULL and it's not
++ pointing at the static user-supplied buffer then
++ we can reallocate it. */
++ && (thisansp != NULL && thisansp != ansp)
+ #ifdef FIONREAD
++ /* Is the size too small? */
+ && (ioctl (pfd[0].fd, FIONREAD, thisresplenp) < 0
+ || *thisanssizp < *thisresplenp)
+ #endif
+ ) {
++ /* Always allocate MAXPACKET, callers expect
++ this specific size. */
+ u_char *newp = malloc (MAXPACKET);
if (newp != NULL) {
- *anssizp = MAXPACKET;
- *thisansp = ans = newp;
+- *anssizp = MAXPACKET;
+- *thisansp = ans = newp;
++ *thisanssizp = MAXPACKET;
++ *thisansp = newp;
+ if (thisansp == ansp2)
+ *ansp2_malloced = 1;
}
}
++ /* We could end up with truncation if anscp was NULL
++ (not allowed to change caller's buffer) and the
++ response buffer size is too small. This isn't a
++ reliable way to detect truncation because the ioctl
++ may be an inaccurate report of the UDP message size.
++ Therefore we use this only to issue debug output.
++ To do truncation accurately with UDP we need
++ MSG_TRUNC which is only available on Linux. We
++ can abstract out the Linux-specific feature in the
++ future to detect truncation. */
++ if (__glibc_unlikely (*thisanssizp < *thisresplenp)) {
++ Dprint(statp->options & RES_DEBUG,
++ (stdout, ";; response may be truncated (UDP)\n")
++ );
++ }
++
HEADER *anhp = (HEADER *) *thisansp;
-@@ -1405,6 +1410,7 @@ send_dg(res_state statp,
+ socklen_t fromlen = sizeof(struct sockaddr_in6);
+ assert (sizeof(from) <= fromlen);
+@@ -1252,7 +1408,7 @@ send_dg(res_state statp,
+ goto wait;
+ }
+ Perror(statp, stderr, "recvfrom", errno);
+- goto err_out;
++ return close_and_return_error (statp, resplen2);
+ }
+ *gotsomewhere = 1;
+ if (__builtin_expect (*thisresplenp < HFIXEDSZ, 0)) {
+@@ -1263,7 +1419,7 @@ send_dg(res_state statp,
+ (stdout, ";; undersized: %d\n",
+ *thisresplenp));
+ *terrno = EMSGSIZE;
+- goto err_out;
++ return close_and_return_error (statp, resplen2);
+ }
+ if ((recvresp1 || hp->id != anhp->id)
+ && (recvresp2 || hp2->id != anhp->id)) {
+@@ -1312,7 +1468,7 @@ send_dg(res_state statp,
+ ? *thisanssizp : *thisresplenp);
+ /* record the error */
+ statp->_flags |= RES_F_EDNS0ERR;
+- goto err_out;
++ return close_and_return_error (statp, resplen2);
+ }
+ #endif
+ if (!(statp->options & RES_INSECURE2)
+@@ -1364,10 +1520,10 @@ send_dg(res_state statp,
+ }
+
+ next_ns:
+- __res_iclose(statp, false);
+ /* don't retry if called from dig */
+ if (!statp->pfcode)
+- return (0);
++ return close_and_return_error (statp, resplen2);
++ __res_iclose(statp, false);
+ }
+ if (anhp->rcode == NOERROR && anhp->ancount == 0
+ && anhp->aa == 0 && anhp->ra == 0 && anhp->arcount == 0) {
+@@ -1389,6 +1545,8 @@ send_dg(res_state statp,
+ __res_iclose(statp, false);
+ // XXX if we have received one reply we could
+ // XXX use it and not repeat it over TCP...
++ if (resplen2 != NULL)
++ *resplen2 = 0;
+ return (1);
+ }
+ /* Mark which reply we received. */
+@@ -1404,20 +1562,22 @@ send_dg(res_state statp,
+ __res_iclose (statp, false);
retval = reopen (statp, terrno, ns);
if (retval <= 0)
- return retval;
+- return retval;
++ {
++ if (resplen2 != NULL)
++ *resplen2 = 0;
++ return retval;
++ }
+ pfd[0].fd = EXT(statp).nssocks[ns];
}
}
goto wait;
+ }
+- /*
+- * All is well, or the error is fatal. Signal that the
+- * next nameserver ought not be tried.
+- */
++ /* All is well. We have received both responses (if
++ two responses were requested). */
+ return (resplen);
+- } else if (pfd[0].revents & (POLLERR | POLLHUP | POLLNVAL)) {
+- /* Something went wrong. We can stop trying. */
+- goto err_out;
+- }
++ } else if (pfd[0].revents & (POLLERR | POLLHUP | POLLNVAL))
++ /* Something went wrong. We can stop trying. */
++ return close_and_return_error (statp, resplen2);
+ else {
+ /* poll should not have returned > 0 in this case. */
+ abort ();
+diff --git a/stdlib/Makefile b/stdlib/Makefile
+index 1be16eb..8a34b83 100644
+--- a/stdlib/Makefile
++++ b/stdlib/Makefile
+@@ -64,11 +64,11 @@ test-srcs := tst-fmtmsg
+ tests := tst-strtol tst-strtod testmb testrand testsort testdiv \
+ test-canon test-canon2 tst-strtoll tst-environ \
+ tst-xpg-basename tst-random tst-random2 tst-bsearch \
+- tst-limits tst-rand48 bug-strtod tst-setcontext \
+- test-a64l tst-qsort tst-system testmb2 bug-strtod2 \
+- tst-atof1 tst-atof2 tst-strtod2 tst-strtod3 tst-rand48-2 \
+- tst-makecontext tst-strtod4 tst-strtod5 tst-qsort2 \
+- tst-makecontext2 tst-strtod6 tst-unsetenv1 \
++ tst-limits tst-rand48 bug-strtod tst-setcontext \
++ tst-setcontext2 test-a64l tst-qsort tst-system testmb2 \
++ bug-strtod2 tst-atof1 tst-atof2 tst-strtod2 tst-strtod3 \
++ tst-rand48-2 tst-makecontext tst-strtod4 tst-strtod5 \
++ tst-qsort2 tst-makecontext2 tst-strtod6 tst-unsetenv1 \
+ tst-makecontext3 bug-getcontext bug-fmtmsg1 \
+ tst-secure-getenv tst-strtod-overflow tst-strtod-round \
+ tst-tininess tst-strtod-underflow tst-tls-atexit
+@@ -164,3 +164,5 @@ tst-tls-atexit-lib.so-no-z-defs = yes
+ $(objpfx)tst-tls-atexit: $(common-objpfx)nptl/libpthread.so \
+ $(common-objpfx)dlfcn/libdl.so
+ $(objpfx)tst-tls-atexit.out: $(objpfx)tst-tls-atexit-lib.so
++
++$(objpfx)tst-makecontext: $(libdl)
+diff --git a/stdlib/tst-makecontext.c b/stdlib/tst-makecontext.c
+index 7968a6d..ef1e27a 100644
+--- a/stdlib/tst-makecontext.c
++++ b/stdlib/tst-makecontext.c
+@@ -19,23 +19,62 @@
+ #include <stdlib.h>
+ #include <stdio.h>
+ #include <ucontext.h>
++#include <assert.h>
++#include <unwind.h>
++#include <dlfcn.h>
++#include <gnu/lib-names.h>
+
+ ucontext_t ucp;
+-char st1[8192];
++char st1[16384];
+ __thread int thr;
+
+ int somevar = -76;
+ long othervar = -78L;
+
++struct trace_arg
++{
++ int cnt, size;
++};
++
++static _Unwind_Reason_Code
++backtrace_helper (struct _Unwind_Context *ctx, void *a)
++{
++ struct trace_arg *arg = a;
++ if (++arg->cnt == arg->size)
++ return _URC_END_OF_STACK;
++ return _URC_NO_REASON;
++}
++
+ void
+ cf (int i)
+ {
++ struct trace_arg arg = { .size = 100, .cnt = -1 };
++ void *handle;
++ _Unwind_Reason_Code (*unwind_backtrace) (_Unwind_Trace_Fn, void *);
++
+ if (i != othervar || thr != 94)
+ {
+ printf ("i %d thr %d\n", i, thr);
+ exit (1);
+ }
+
++ /* Test if callback function of _Unwind_Backtrace is not called infinitely
++ times. See Bug 18508 or gcc bug "Bug 66303 - runtime.Caller() returns
++ infinitely deep stack frames on s390x.".
++ The go runtime calls backtrace_full() in
++ <gcc-src>/libbacktrace/backtrace.c, which uses _Unwind_Backtrace(). */
++ handle = dlopen (LIBGCC_S_SO, RTLD_LAZY);
++ if (handle != NULL)
++ {
++ unwind_backtrace = dlsym (handle, "_Unwind_Backtrace");
++ if (unwind_backtrace != NULL)
++ {
++ unwind_backtrace (backtrace_helper, &arg);
++ assert (arg.cnt != -1 && arg.cnt < 100);
++ }
++ dlclose (handle);
++ }
++
+ /* Since uc_link below has been set to NULL, setcontext is supposed to
+ terminate the process normally after this function returns. */
+ }
+diff --git a/stdlib/tst-setcontext2.c b/stdlib/tst-setcontext2.c
+new file mode 100644
+index 0000000..8582cc0
+--- /dev/null
++++ b/stdlib/tst-setcontext2.c
+@@ -0,0 +1,230 @@
++/* Testcase checks, if setcontext(), swapcontext() restores signal-mask
++ and if pending signals are delivered after those calls.
++ Copyright (C) 2015 Free Software Foundation, Inc.
++ This file is part of the GNU C Library.
++
++ The GNU C Library is free software; you can redistribute it and/or
++ modify it under the terms of the GNU Lesser General Public
++ License as published by the Free Software Foundation; either
++ version 2.1 of the License, or (at your option) any later version.
++
++ The GNU C Library is distributed in the hope that it will be useful,
++ but WITHOUT ANY WARRANTY; without even the implied warranty of
++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ Lesser General Public License for more details.
++
++ You should have received a copy of the GNU Lesser General Public
++ License along with the GNU C Library; if not, see
++ <http://www.gnu.org/licenses/>. */
++
++#include <stdio.h>
++#include <stdlib.h>
++#include <sys/types.h>
++#include <signal.h>
++#include <ucontext.h>
++#include <unistd.h>
++
++volatile int global;
++volatile sig_atomic_t handlerCalled;
++
++static void
++check (const char *funcName)
++{
++ sigset_t set;
++
++ /* check if SIGUSR2 is unblocked after setcontext-call. */
++ sigprocmask (SIG_BLOCK, NULL, &set);
++
++ if (sigismember (&set, SIGUSR2) != 0)
++ {
++ printf ("FAIL: SIGUSR2 is blocked after %s.\n", funcName);
++ exit (1);
++ }
++
++ if (sigismember (&set, SIGUSR1) != 1)
++ {
++ printf ("FAIL: SIGUSR1 is not blocked after %s.\n", funcName);
++ exit (1);
++ }
++}
++
++static void
++signalmask (int how, int signum)
++{
++ sigset_t set;
++ sigemptyset (&set);
++ sigaddset (&set, signum);
++ if (sigprocmask (how, &set, NULL) != 0)
++ {
++ printf ("FAIL: sigprocmaks (%d, %d, NULL): %m\n", how, signum);
++ exit (1);
++ }
++}
++
++static void
++signalpending (int signum, const char *msg)
++{
++ sigset_t set;
++ sigemptyset (&set);
++ if (sigpending (&set) != 0)
++ {
++ printf ("FAIL: sigpending: %m\n");
++ exit (1);
++ }
++ if (sigismember (&set, SIGUSR2) != 1)
++ {
++ printf ("FAIL: Signal %d is not pending %s\n", signum, msg);
++ exit (1);
++ }
++}
++
++static void
++handler (int __attribute__ ((unused)) signum)
++{
++ handlerCalled ++;
++}
++
++static int
++do_test (void)
++{
++ ucontext_t ctx, oldctx;
++ struct sigaction action;
++ pid_t pid;
++
++ pid = getpid ();
++
++ /* unblock SIGUSR2 */
++ signalmask (SIG_UNBLOCK, SIGUSR2);
++
++ /* block SIGUSR1 */
++ signalmask (SIG_BLOCK, SIGUSR1);
++
++ /* register handler for SIGUSR2 */
++ action.sa_flags = 0;
++ action.sa_handler = handler;
++ sigemptyset (&action.sa_mask);
++ sigaction (SIGUSR2, &action, NULL);
++
++ if (getcontext (&ctx) != 0)
++ {
++ printf ("FAIL: getcontext: %m\n");
++ exit (1);
++ }
++
++ global++;
++
++ if (global == 1)
++ {
++ puts ("after getcontext");
++
++ /* block SIGUSR2 */
++ signalmask (SIG_BLOCK, SIGUSR2);
++
++ /* send SIGUSR2 to me */
++ handlerCalled = 0;
++ kill (pid, SIGUSR2);
++
++ /* was SIGUSR2 handler called? */
++ if (handlerCalled != 0)
++ {
++ puts ("FAIL: signal handler was called, but signal was blocked.");
++ exit (1);
++ }
++
++ /* is SIGUSR2 pending? */
++ signalpending (SIGUSR2, "before setcontext");
++
++ /* SIGUSR2 will be unblocked by setcontext-call. */
++ if (setcontext (&ctx) != 0)
++ {
++ printf ("FAIL: setcontext: %m\n");
++ exit (1);
++ }
++ }
++ else if (global == 2)
++ {
++ puts ("after setcontext");
++
++ /* check SIGUSR1/2 */
++ check ("setcontext");
++
++ /* was SIGUSR2 handler called? */
++ if (handlerCalled != 1)
++ {
++ puts ("FAIL: signal handler was not called after setcontext.");
++ exit (1);
++ }
++
++ /* block SIGUSR2 */
++ signalmask (SIG_BLOCK, SIGUSR2);
++
++ /* send SIGUSR2 to me */
++ handlerCalled = 0;
++ kill (pid, SIGUSR2);
++
++ /* was SIGUSR2 handler called? */
++ if (handlerCalled != 0)
++ {
++ puts ("FAIL: signal handler was called, but signal was blocked.");
++ exit (1);
++ }
++
++ /* is SIGUSR2 pending? */
++ signalpending (SIGUSR2, "before swapcontext");
++
++ if (swapcontext (&oldctx, &ctx) != 0)
++ {
++ printf ("FAIL: swapcontext: %m\n");
++ exit (1);
++ }
++
++ puts ("after returned from swapcontext");
++
++ if (global != 3)
++ {
++ puts ("FAIL: returned from swapcontext without ctx-context called.");
++ exit (1);
++ }
++
++ puts ("test succeeded");
++ return 0;
++ }
++ else if ( global != 3 )
++ {
++ puts ("FAIL: 'global' not incremented three times");
++ exit (1);
++ }
++
++ puts ("after swapcontext");
++ /* check SIGUSR1/2 */
++ check ("swapcontext");
++
++ /* was SIGUSR2 handler called? */
++ if (handlerCalled != 1)
++ {
++ puts ("FAIL: signal handler was not called after swapcontext.");
++ exit (1);
++ }
++
++ /* check sigmask in old context of swapcontext-call */
++ if (sigismember (&oldctx.uc_sigmask, SIGUSR2) != 1)
++ {
++ puts ("FAIL: SIGUSR2 is not blocked in oldctx.uc_sigmask.");
++ exit (1);
++ }
++
++ if (sigismember (&oldctx.uc_sigmask, SIGUSR1) != 1)
++ {
++ puts ("FAIL: SIGUSR1 is not blocked in oldctx.uc_sigmaks.");
++ exit (1);
++ }
++
++ /* change to old context, which was gathered by swapcontext() call. */
++ setcontext (&oldctx);
++
++ puts ("FAIL: returned from setcontext (&oldctx)");
++ exit (1);
++}
++
++#define TEST_FUNCTION do_test ()
++#include "../test-skeleton.c"
diff --git a/string/test-strcmp.c b/string/test-strcmp.c
index b395dc7..fcd059f 100644
--- a/string/test-strcmp.c
@@ -3586,10 +5068,171 @@ index 6105e9f..50109b8 100644
cor = (cor > 0) ? 1.035 * cor + eps : 1.035 * cor - eps;
retval = ((res == res + cor) ? ((m) ? res : -res)
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
-index 8218237..d2283bc 100644
+index 8218237..df6ce8b 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
-@@ -712,6 +712,18 @@ gaih_inet (const char *name, const struct gaih_service
*service,
+@@ -168,9 +168,58 @@ gaih_inet_serv (const char *servicename, const struct
gaih_typeproto *tp,
+ return 0;
+ }
+
++/* Convert struct hostent to a list of struct gaih_addrtuple objects.
++ h_name is not copied, and the struct hostent object must not be
++ deallocated prematurely. *RESULT must be NULL or a pointer to an
++ object allocated using malloc, which is freed. */
++static bool
++convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
++ int family,
++ struct hostent *h,
++ struct gaih_addrtuple **result)
++{
++ free (*result);
++ *result = NULL;
++
++ /* Count the number of addresses in h->h_addr_list. */
++ size_t count = 0;
++ for (char **p = h->h_addr_list; *p != NULL; ++p)
++ ++count;
++
++ /* Report no data if no addresses are available, or if the incoming
++ address size is larger than what we can store. */
++ if (count == 0 || h->h_length > sizeof (((struct gaih_addrtuple) {}).addr))
++ return true;
++
++ struct gaih_addrtuple *array = calloc (count, sizeof (*array));
++ if (array == NULL)
++ return false;
++
++ for (size_t i = 0; i < count; ++i)
++ {
++ if (family == AF_INET && req->ai_family == AF_INET6)
++ {
++ /* Perform address mapping. */
++ array[i].family = AF_INET6;
++ memcpy(array[i].addr + 3, h->h_addr_list[i], sizeof (uint32_t));
++ array[i].addr[2] = htonl (0xffff);
++ }
++ else
++ {
++ array[i].family = family;
++ memcpy (array[i].addr, h->h_addr_list[i], h->h_length);
++ }
++ array[i].next = array + i + 1;
++ }
++ array[0].name = h->h_name;
++ array[count - 1].next = NULL;
++
++ *result = array;
++ return true;
++}
++
+ #define gethosts(_family, _type) \
+ { \
+- int i; \
+ int herrno; \
+ struct hostent th; \
+ struct hostent *h; \
+@@ -219,36 +268,23 @@ gaih_inet_serv (const char *servicename, const struct
gaih_typeproto *tp,
+ } \
+ else if (h != NULL) \
+ { \
+- for (i = 0; h->h_addr_list[i]; i++) \
++ /* Make sure that addrmem can be freed. */ \
++ if (!malloc_addrmem) \
++ addrmem = NULL; \
++ if (!convert_hostent_to_gaih_addrtuple (req, _family,h, &addrmem))
\
+ { \
+- if (*pat == NULL) \
+- { \
+- *pat = __alloca (sizeof (struct gaih_addrtuple)); \
+- (*pat)->scopeid = 0; \
+- } \
+- uint32_t *addr = (*pat)->addr; \
+- (*pat)->next = NULL; \
+- (*pat)->name = i == 0 ? strdupa (h->h_name) : NULL; \
+- if (_family == AF_INET && req->ai_family == AF_INET6) \
+- { \
+- (*pat)->family = AF_INET6; \
+- addr[3] = *(uint32_t *) h->h_addr_list[i]; \
+- addr[2] = htonl (0xffff); \
+- addr[1] = 0; \
+- addr[0] = 0; \
+- } \
+- else \
+- { \
+- (*pat)->family = _family; \
+- memcpy (addr, h->h_addr_list[i], sizeof(_type)); \
+- } \
+- pat = &((*pat)->next); \
++ _res.options |= old_res_options & RES_USE_INET6; \
++ result = -EAI_SYSTEM; \
++ goto free_and_return; \
+ } \
++ *pat = addrmem; \
++ /* The conversion uses malloc unconditionally. */ \
++ malloc_addrmem = true; \
+ \
+ if (localcanon != NULL && canon == NULL)
\
+ canon = strdupa (localcanon); \
+ \
+- if (_family == AF_INET6 && i > 0)
\
++ if (_family == AF_INET6 && *pat != NULL)
\
+ got_ipv6 = true; \
+ } \
+ }
+@@ -612,44 +648,16 @@ gaih_inet (const char *name, const struct gaih_service
*service,
+ {
+ if (h != NULL)
+ {
+- int i;
+- /* We found data, count the number of addresses. */
+- for (i = 0; h->h_addr_list[i]; ++i)
+- ;
+- if (i > 0 && *pat != NULL)
+- --i;
+-
+- if (__libc_use_alloca (alloca_used
+- + i * sizeof (struct
gaih_addrtuple)))
+- addrmem = alloca_account (i * sizeof (struct
gaih_addrtuple),
+- alloca_used);
+- else
++ /* We found data, convert it. */
++ if (!convert_hostent_to_gaih_addrtuple
++ (req, AF_INET, h, &addrmem))
+ {
+- addrmem = malloc (i
+- * sizeof (struct gaih_addrtuple));
+- if (addrmem == NULL)
+- {
+- result = -EAI_MEMORY;
+- goto free_and_return;
+- }
+- malloc_addrmem = true;
+- }
+-
+- /* Now convert it into the list. */
+- struct gaih_addrtuple *addrfree = addrmem;
+- for (i = 0; h->h_addr_list[i]; ++i)
+- {
+- if (*pat == NULL)
+- {
+- *pat = addrfree++;
+- (*pat)->scopeid = 0;
+- }
+- (*pat)->next = NULL;
+- (*pat)->family = AF_INET;
+- memcpy ((*pat)->addr, h->h_addr_list[i],
+- h->h_length);
+- pat = &((*pat)->next);
++ result = -EAI_MEMORY;
++ goto free_and_return;
+ }
++ *pat = addrmem;
++ /* The conversion uses malloc unconditionally. */
++ malloc_addrmem = true;
+ }
+ }
+ else
+@@ -712,6 +720,18 @@ gaih_inet (const char *name, const struct gaih_service
*service,
{
socklen_t size = (air->family[i] == AF_INET
? INADDRSZ : IN6ADDRSZ);
@@ -4963,6 +6606,48 @@ index 8925396..f32b0fc 100644
cmp rTMP1, rSTRXOR
retl
movgu %xcc, 0, %o0
+diff --git a/sysdeps/unix/sysv/linux/i386/glob64.c
b/sysdeps/unix/sysv/linux/i386/glob64.c
+index b4fcd1a..802c957 100644
+--- a/sysdeps/unix/sysv/linux/i386/glob64.c
++++ b/sysdeps/unix/sysv/linux/i386/glob64.c
+@@ -1,3 +1,21 @@
++/* Two glob variants with 64-bit support, for dirent64 and __olddirent64.
++ Copyright (C) 1998-2016 Free Software Foundation, Inc.
++ This file is part of the GNU C Library.
++
++ The GNU C Library is free software; you can redistribute it and/or
++ modify it under the terms of the GNU Lesser General Public
++ License as published by the Free Software Foundation; either
++ version 2.1 of the License, or (at your option) any later version.
++
++ The GNU C Library is distributed in the hope that it will be useful,
++ but WITHOUT ANY WARRANTY; without even the implied warranty of
++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ Lesser General Public License for more details.
++
++ You should have received a copy of the GNU Lesser General Public
++ License along with the GNU C Library; if not, see
++ <http://www.gnu.org/licenses/>. */
++
+ #include <dirent.h>
+ #include <glob.h>
+ #include <sys/stat.h>
+@@ -38,11 +56,15 @@ int __old_glob64 (const char *__pattern, int __flags,
+
+ #undef dirent
+ #define dirent __old_dirent64
++#undef GL_READDIR
++# define GL_READDIR(pglob, stream) \
++ ((struct __old_dirent64 *) (pglob)->gl_readdir (stream))
+ #undef __readdir
+ #define __readdir(dirp) __old_readdir64 (dirp)
+ #undef glob
+ #define glob(pattern, flags, errfunc, pglob) \
+ __old_glob64 (pattern, flags, errfunc, pglob)
++#define convert_dirent __old_convert_dirent
+ #define glob_in_dir __old_glob_in_dir
+ #define GLOB_ATTRIBUTE attribute_compat_text_section
+
diff --git a/sysdeps/unix/sysv/linux/s390/Makefile
b/sysdeps/unix/sysv/linux/s390/Makefile
index f91179d..45b1922 100644
--- a/sysdeps/unix/sysv/linux/s390/Makefile
@@ -5145,6 +6830,25 @@ index a1b7a6a..e74f335 100644
-# endif
-#endif /* !NOT_IN_libc */
+#include "__longjmp.c"
+diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S
b/sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S
+index 83cf0d8..67ea206 100644
+--- a/sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S
++++ b/sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S
+@@ -17,6 +17,14 @@
+
+ #include <sysdep.h>
+
++/* We do not want .eh_frame info so that __makecontext_ret stops unwinding
++ if backtrace was called within a context created by makecontext. (There
++ is also no .eh_frame info for _start or thread_start.) */
++#undef cfi_startproc
++#define cfi_startproc
++#undef cfi_endproc
++#define cfi_endproc
++
+ ENTRY(__makecontext_ret)
+ basr %r14,%r7
+ ltr %r8,%r8 /* Check whether uc_link is 0. */
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/getcontext-common.S
b/sysdeps/unix/sysv/linux/s390/s390-32/getcontext-common.S
deleted file mode 100644
index 4992030..0000000
@@ -5368,9 +7072,18 @@ index 03f2e83..0194f0b 100644
_longjmp F
_setjmp F
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/setcontext.S
b/sysdeps/unix/sysv/linux/s390/s390-32/setcontext.S
-index fbe8b77..42839e2 100644
+index fbe8b77..b263773 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/setcontext.S
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/setcontext.S
+@@ -34,7 +34,7 @@ ENTRY(__setcontext)
+ lr %r1,%r2
+
+ /* rt_sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL, sigsetsize). */
+- la %r2,SIG_BLOCK
++ la %r2,SIG_SETMASK
+ la %r3,SC_MASK(%r1)
+ slr %r4,%r4
+ lhi %r5,_NSIG8
@@ -62,16 +62,8 @@ ENTRY(__setcontext)
/* Don't touch %a0, used for thread purposes. */
lam %a1,%a15,SC_ACRS+4(%r1)
@@ -5390,10 +7103,33 @@ index fbe8b77..42839e2 100644
/* Return. */
br %r14
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S
b/sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S
-index 41ede4b..9206aa3 100644
+index 41ede4b..8f9cfd8 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S
-@@ -65,31 +65,19 @@ ENTRY(__swapcontext)
+@@ -24,7 +24,7 @@
+ /* __swapcontext (ucontext_t *oucp, const ucontext_t *ucp)
+
+ Saves the machine context in oucp such that when it is activated,
+- it appears as if __swapcontextt() returned again, restores the
++ it appears as if __swapcontext() returned again, restores the
+ machine context in ucp and thereby resumes execution in that
+ context.
+
+@@ -39,13 +39,6 @@ ENTRY(__swapcontext)
+ lr %r1,%r2
+ lr %r0,%r3
+
+- /* sigprocmask (SIG_BLOCK, NULL, &sc->sc_mask). */
+- la %r2,SIG_BLOCK
+- slr %r3,%r3
+- la %r4,SC_MASK(%r1)
+- lhi %r5,_NSIG8
+- svc SYS_ify(rt_sigprocmask)
+-
+ /* Store fpu context. */
+ stfpc SC_FPC(%r1)
+ std %f0,SC_FPRS(%r1)
+@@ -65,32 +58,21 @@ ENTRY(__swapcontext)
std %f14,SC_FPRS+112(%r1)
std %f15,SC_FPRS+120(%r1)
@@ -5410,8 +7146,9 @@ index 41ede4b..9206aa3 100644
stm %r0,%r15,SC_GPRS(%r1)
- /* Copy uc_flags into the new ucontext_t. */
-+ /* sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL). */
-+ la %r2,SIG_BLOCK
++ /* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask,
++ sigsetsize). */
++ la %r2,SIG_SETMASK
lr %r5,%r0
- l %r2,SC_FLGS(%r5)
- st %r2,SC_FLGS(%r1)
@@ -5427,10 +7164,12 @@ index 41ede4b..9206aa3 100644
- /* rt_sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL, sigsetsize). */
-0: la %r2,SIG_BLOCK
- la %r3,SC_MASK(%r5)
+- slr %r4,%r4
+ la %r3,SC_MASK(%r5)
- slr %r4,%r4
++ la %r4,SC_MASK(%r1)
lhi %r5,_NSIG8
svc SYS_ify(rt_sigprocmask)
+
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/ucontext_i.sym
b/sysdeps/unix/sysv/linux/s390/s390-32/ucontext_i.sym
deleted file mode 100644
index 705c7ab..0000000
@@ -5503,6 +7242,25 @@ index bc27b08..a3b1375 100644
-# endif
-#endif /* !NOT_IN_libc */
+#include "__longjmp.c"
+diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S
b/sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S
+index 71ecbab..a2bf3ca 100644
+--- a/sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S
++++ b/sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S
+@@ -17,6 +17,14 @@
+
+ #include <sysdep.h>
+
++/* We do not want .eh_frame info so that __makecontext_ret stops unwinding
++ if backtrace was called within a context created by makecontext. (There
++ is also no .eh_frame info for _start or thread_start.) */
++#undef cfi_startproc
++#define cfi_startproc
++#undef cfi_endproc
++#define cfi_endproc
++
+ ENTRY(__makecontext_ret)
+ basr %r14,%r7
+ ltgr %r8,%r8 /* Check whether uc_link is 0. */
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/getcontext-common.S
b/sysdeps/unix/sysv/linux/s390/s390-64/getcontext-common.S
deleted file mode 100644
index 3e61e30..0000000
@@ -5692,11 +7450,47 @@ index 4576fc8..807f702 100644
__sigsetjmp F
_longjmp F
_setjmp F
+diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/setcontext.S
b/sysdeps/unix/sysv/linux/s390/s390-64/setcontext.S
+index 83df5ce..1464e6a 100644
+--- a/sysdeps/unix/sysv/linux/s390/s390-64/setcontext.S
++++ b/sysdeps/unix/sysv/linux/s390/s390-64/setcontext.S
+@@ -34,7 +34,7 @@ ENTRY(__setcontext)
+ lgr %r1,%r2
+
+ /* sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL). */
+- la %r2,SIG_BLOCK
++ la %r2,SIG_SETMASK
+ la %r3,SC_MASK(%r1)
+ slgr %r4,%r4
+ lghi %r5,_NSIG8
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S
b/sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S
-index ac74b6b..e3e624c 100644
+index ac74b6b..8346fd5 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S
-@@ -65,25 +65,21 @@ ENTRY(__swapcontext)
+@@ -24,7 +24,7 @@
+ /* __swapcontext (ucontext_t *oucp, const ucontext_t *ucp)
+
+ Saves the machine context in oucp such that when it is activated,
+- it appears as if __swapcontextt() returned again, restores the
++ it appears as if __swapcontext() returned again, restores the
+ machine context in ucp and thereby resumes execution in that
+ context.
+
+@@ -39,13 +39,6 @@ ENTRY(__swapcontext)
+ lgr %r1,%r2
+ lgr %r0,%r3
+
+- /* sigprocmask (SIG_BLOCK, NULL, &sc->sc_mask). */
+- la %r2,SIG_BLOCK
+- slgr %r3,%r3
+- la %r4,SC_MASK(%r1)
+- lghi %r5,_NSIG8
+- svc SYS_ify(rt_sigprocmask)
+-
+ /* Store fpu context. */
+ stfpc SC_FPC(%r1)
+ std %f0,SC_FPRS(%r1)
+@@ -65,24 +58,21 @@ ENTRY(__swapcontext)
std %f14,SC_FPRS+112(%r1)
std %f15,SC_FPRS+120(%r1)
@@ -5713,20 +7507,21 @@ index ac74b6b..e3e624c 100644
stmg %r0,%r15,SC_GPRS(%r1)
- /* Copy uc_flags into the new ucontext_t. */
-- lgr %r5,%r0
++ /* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask,
++ sigsetsize). */
++ la %r2,SIG_SETMASK
+ lgr %r5,%r0
- lg %r2,SC_FLGS(%r5)
- stg %r2,SC_FLGS(%r1)
-
- /* rt_sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL, sigsetsize). */
- la %r2,SIG_BLOCK
-+ lgr %r5,%r0
+- /* rt_sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL, sigsetsize). */
+- la %r2,SIG_BLOCK
la %r3,SC_MASK(%r5)
- slgr %r4,%r4
++ la %r4,SC_MASK(%r1)
lghi %r5,_NSIG8
-+ slgr %r4,%r4
svc SYS_ify(rt_sigprocmask)
- /* Load fpu context. */
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/ucontext_i.sym
b/sysdeps/unix/sysv/linux/s390/s390-64/ucontext_i.sym
deleted file mode 100644
index 6cc9f19..0000000
diff --git a/debian/patches/series b/debian/patches/series
index 7421910..0ab9a1c 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -275,5 +275,4 @@ any/cvs-ldconfig-aux-cache.diff
any/cvs-ld_pointer_guard.diff
any/cvs-mangle-tls_dtor_list.diff
any/cvs-strxfrm-buffer-overflows.diff
-any/local-CVE-2015-7547.diff
any/cvs-grantpt-pty-owner.diff
-- System Information:
Debian Release: stretch/sid
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.6.0-trunk-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
--- End Message ---
