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and subject line Bug#341773: fixed in libnss-db 2.2.3pre1-2
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Date: Sat, 3 Dec 2005 09:50:04 +1100
From: Daniel Stone <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: segfaults (!) when processing previously valid group files
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Package: libnss-db
Version: 2.2.3pre1-1
Severity: critical
Justification: smashes entire system with WORLD-ENDING levels of breakage
Hi,
Using libnss-db from sid results in some rather, er, unpleasant
behaviour. With the group files below, and 'group: compat db' in
nsswitch.conf, anything that attempts to deal with groups, segfaults.
This includes OpenSSH (so not even root can log in), and su. The end
result is that you better well have rockin' remote management so you can
reboot your machine and boot with init=/bin/sh.
Downgrading to libnss-db 2.2-6.3 works just fine.
This is the backtrace generated with libc6-dbg:
(gdb) bt f
#0 *__GI__nss_files_parse_grent (
line=0x7fbffff3f6
"jrfonseca,kaleb,ago,stukreit,cworth,keithp,clee,kem,branden,jkolb,doursse,jkj,bogdand,sndirsch,jbarnes,mhopf,spyderous,aplattner,benh,philipl",
result=0x7fbffff6b0, data=0x7fbffff260, datalen=1024,
errnop=0x622c72656e747461) at files-parse.c:208
list = (char **) 0x7fbffff660
p = Variable "p" is not available.
(gdb) print *data
$7 = {linebuffer = 0x7fbffff260 "xorg"}
(gdb) print *result
$8 = {gr_name = 0x7fbffff260 "xorg", gr_passwd = 0x7fbffff265 "x",
gr_gid = 801, gr_mem = 0x7fbffff290}
(gdb) print **list
$9 = 0 '\0'
(gdb) print *errnop
Cannot access memory at address 0x622c72656e747461
Notice how errnop in particular seems to be wildly off.
Also, I don't claim to know the internals of exactly how it works, but
line is badly truncated; this is the original:
xorg:x:801:daniels,gisburn,eich,jg,pma,pascal,twini,jacotton,unichrome,alanh,alanc,amirbukhari,hyu,ldelgass,fabbione,brianp,nakee,mharris,deronj,daenzer,keithw,kendallb,harold,torrey,zack,ewalsh,earle,wt,bastian,faith,idr,krh,nolan,jdennis,ajax,josh,takuma,mark,volodya,adg,anderson,sandmann,vektor,syrjala,fxkuehl,zakki,anholt,alan,libv,sroland,erdi,viewtouch,agd5f,kuhn,jhobson,herrb,davidr,lars,airlied,jrfonseca,kaleb,ago,stukreit,cworth,keithp,clee,kem,branden,jkolb,doursse,jkj,bogdand,sndirsch,jbarnes,mhopf,spyderous,aplattner,benh,philipl
This is an amd64 system.
Original TDB file:
http://annarchy.freedesktop.org/~daniels/group.tdb
Processed DB file:
http://annarchy.freedesktop.org/~daniels/group.db
Cheers,
Daniel
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From: Piotr Roszatycki <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
X-Katie: $Revision: 1.65 $
Subject: Bug#341773: fixed in libnss-db 2.2.3pre1-2
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Date: Mon, 19 Dec 2005 05:47:08 -0800
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Source: libnss-db
Source-Version: 2.2.3pre1-2
We believe that the bug you reported is fixed in the latest version of
libnss-db, which is due to be installed in the Debian FTP archive:
libnss-db_2.2.3pre1-2.diff.gz
to pool/main/libn/libnss-db/libnss-db_2.2.3pre1-2.diff.gz
libnss-db_2.2.3pre1-2.dsc
to pool/main/libn/libnss-db/libnss-db_2.2.3pre1-2.dsc
libnss-db_2.2.3pre1-2_i386.deb
to pool/main/libn/libnss-db/libnss-db_2.2.3pre1-2_i386.deb
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [EMAIL PROTECTED],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Piotr Roszatycki <[EMAIL PROTECTED]> (supplier of updated libnss-db package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [EMAIL PROTECTED])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Format: 1.7
Date: Mon, 19 Dec 2005 11:45:15 +0100
Source: libnss-db
Binary: libnss-db
Architecture: source i386
Version: 2.2.3pre1-2
Distribution: unstable
Urgency: high
Maintainer: Piotr Roszatycki <[EMAIL PROTECTED]>
Changed-By: Piotr Roszatycki <[EMAIL PROTECTED]>
Description:
libnss-db - NSS module for using Berkeley Databases as a naming service
Closes: 322190 341773
Changes:
libnss-db (2.2.3pre1-2) unstable; urgency=high
.
* Renumbered Debian patches.
* Modified 060-errno.patch:
- Do not remove errnop variable. It causes fatal error on amd64. Just
set errno to ENOENT by default. Closes: #341773.
* Modified 070-selinux.patch:
- Fix configure script for SELinux and fix FTBFS on hurd-i386.
Closes: #322190.
* Removed 120-gettextize.patch:
- Call gettextize in build time with a little help of IPC::Run.
Files:
4f9ca4e8c1b38e33bb9588f160e3e187 702 admin standard libnss-db_2.2.3pre1-2.dsc
d4bfc2b150a09f7ac5a2639ff5b4663f 15142 admin standard
libnss-db_2.2.3pre1-2.diff.gz
8dced130fb5691e2c4bfb340eed50a74 25508 admin standard
libnss-db_2.2.3pre1-2_i386.deb
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