Author: kmacy
Date: Thu Feb 23 18:21:37 2012
New Revision: 232054
URL: http://svn.freebsd.org/changeset/base/232054
Log:
When using flowtable llentrys can outlive the interface with which they're
associated
at which the lle_tbl pointer points to freed memory and the llt_free pointer
is no longer
valid.
Move the free pointer in to the llentry itself and update the initalization
sites.
MFC after: 2 weeks
Modified:
head/sys/net/if_llatbl.h
head/sys/netinet/in.c
head/sys/netinet6/in6.c
Modified: head/sys/net/if_llatbl.h
==============================================================================
--- head/sys/net/if_llatbl.h Thu Feb 23 17:57:08 2012 (r232053)
+++ head/sys/net/if_llatbl.h Thu Feb 23 18:21:37 2012 (r232054)
@@ -106,7 +106,6 @@ struct llentry {
("negative refcnt %d", (lle)->lle_refcnt)); \
(lle)->lle_refcnt++; \
} while (0)
-
#define LLE_REMREF(lle) do { \
LLE_WLOCK_ASSERT(lle); \
KASSERT((lle)->lle_refcnt > 1, \
@@ -116,7 +115,7 @@ struct llentry {
#define LLE_FREE_LOCKED(lle) do { \
if ((lle)->lle_refcnt <= 1) \
- (lle)->lle_tbl->llt_free((lle)->lle_tbl, (lle));\
+ (lle)->lle_free((lle)->lle_tbl, (lle));\
else { \
(lle)->lle_refcnt--; \
LLE_WUNLOCK(lle); \
@@ -152,7 +151,6 @@ struct lltable {
int llt_af;
struct ifnet *llt_ifp;
- void (*llt_free)(struct lltable *, struct llentry *);
void (*llt_prefix_free)(struct lltable *,
const struct sockaddr *prefix,
const struct sockaddr *mask,
Modified: head/sys/netinet/in.c
==============================================================================
--- head/sys/netinet/in.c Thu Feb 23 17:57:08 2012 (r232053)
+++ head/sys/netinet/in.c Thu Feb 23 18:21:37 2012 (r232054)
@@ -1260,6 +1260,20 @@ struct in_llentry {
struct sockaddr_in l3_addr4;
};
+/*
+ * Deletes an address from the address table.
+ * This function is called by the timer functions
+ * such as arptimer() and nd6_llinfo_timer(), and
+ * the caller does the locking.
+ */
+static void
+in_lltable_free(struct lltable *llt, struct llentry *lle)
+{
+ LLE_WUNLOCK(lle);
+ LLE_LOCK_DESTROY(lle);
+ free(lle, M_LLTABLE);
+}
+
static struct llentry *
in_lltable_new(const struct sockaddr *l3addr, u_int flags)
{
@@ -1277,25 +1291,11 @@ in_lltable_new(const struct sockaddr *l3
lle->base.la_expire = time_uptime; /* mark expired */
lle->l3_addr4 = *(const struct sockaddr_in *)l3addr;
lle->base.lle_refcnt = 1;
+ lle->base.lle_free = in_lltable_free;
LLE_LOCK_INIT(&lle->base);
return &lle->base;
}
-/*
- * Deletes an address from the address table.
- * This function is called by the timer functions
- * such as arptimer() and nd6_llinfo_timer(), and
- * the caller does the locking.
- */
-static void
-in_lltable_free(struct lltable *llt, struct llentry *lle)
-{
- LLE_WUNLOCK(lle);
- LLE_LOCK_DESTROY(lle);
- free(lle, M_LLTABLE);
-}
-
-
#define IN_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \
(((ntohl((d)->sin_addr.s_addr) ^ (a)->sin_addr.s_addr) &
(m)->sin_addr.s_addr)) == 0 )
@@ -1577,7 +1577,6 @@ in_domifattach(struct ifnet *ifp)
llt = lltable_init(ifp, AF_INET);
if (llt != NULL) {
- llt->llt_free = in_lltable_free;
llt->llt_prefix_free = in_lltable_prefix_free;
llt->llt_lookup = in_lltable_lookup;
llt->llt_dump = in_lltable_dump;
Modified: head/sys/netinet6/in6.c
==============================================================================
--- head/sys/netinet6/in6.c Thu Feb 23 17:57:08 2012 (r232053)
+++ head/sys/netinet6/in6.c Thu Feb 23 18:21:37 2012 (r232054)
@@ -2439,6 +2439,20 @@ struct in6_llentry {
struct sockaddr_in6 l3_addr6;
};
+/*
+ * Deletes an address from the address table.
+ * This function is called by the timer functions
+ * such as arptimer() and nd6_llinfo_timer(), and
+ * the caller does the locking.
+ */
+static void
+in6_lltable_free(struct lltable *llt, struct llentry *lle)
+{
+ LLE_WUNLOCK(lle);
+ LLE_LOCK_DESTROY(lle);
+ free(lle, M_LLTABLE);
+}
+
static struct llentry *
in6_lltable_new(const struct sockaddr *l3addr, u_int flags)
{
@@ -2451,6 +2465,7 @@ in6_lltable_new(const struct sockaddr *l
lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr;
lle->base.lle_refcnt = 1;
+ lle->base.lle_free = in6_lltable_free;
LLE_LOCK_INIT(&lle->base);
callout_init_rw(&lle->base.ln_timer_ch, &lle->base.lle_lock,
CALLOUT_RETURNUNLOCKED);
@@ -2458,20 +2473,6 @@ in6_lltable_new(const struct sockaddr *l
return &lle->base;
}
-/*
- * Deletes an address from the address table.
- * This function is called by the timer functions
- * such as arptimer() and nd6_llinfo_timer(), and
- * the caller does the locking.
- */
-static void
-in6_lltable_free(struct lltable *llt, struct llentry *lle)
-{
- LLE_WUNLOCK(lle);
- LLE_LOCK_DESTROY(lle);
- free(lle, M_LLTABLE);
-}
-
static void
in6_lltable_prefix_free(struct lltable *llt,
const struct sockaddr *prefix,
@@ -2713,7 +2714,6 @@ in6_domifattach(struct ifnet *ifp)
ext->scope6_id = scope6_ifattach(ifp);
ext->lltable = lltable_init(ifp, AF_INET6);
if (ext->lltable != NULL) {
- ext->lltable->llt_free = in6_lltable_free;
ext->lltable->llt_prefix_free = in6_lltable_prefix_free;
ext->lltable->llt_lookup = in6_lltable_lookup;
ext->lltable->llt_dump = in6_lltable_dump;
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