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authorPatrick McHardy <kaber@trash.net>2010-04-15 13:29:28 +0200
committerPatrick McHardy <kaber@trash.net>2010-04-15 13:31:29 +0200
commit8de53dfbf9a0a0f7538c005137059c5c021476e1 (patch)
tree51fbba0b36a24feac02fa76d4deaecfcdece7c7f /net/ipv4/ipmr.c
parentb0ebb739a8f68039f03e80b3476b204fe5adf0d7 (diff)
ipv4: ipmr: fix NULL pointer deref during unres queue destruction
Fix an oversight in ipmr_destroy_unres() - the net pointer is unconditionally initialized to NULL, resulting in a NULL pointer dereference later on. Fix by adding a net pointer to struct mr_table and using it in ipmr_destroy_unres(). Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net/ipv4/ipmr.c')
-rw-r--r--net/ipv4/ipmr.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 0643fb6d47c4..7d8a2bcecb76 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -71,6 +71,9 @@
struct mr_table {
struct list_head list;
+#ifdef CONFIG_NET_NS
+ struct net *net;
+#endif
u32 id;
struct sock *mroute_sk;
struct timer_list ipmr_expire_timer;
@@ -308,6 +311,7 @@ static struct mr_table *ipmr_new_table(struct net *net, u32 id)
mrt = kzalloc(sizeof(*mrt), GFP_KERNEL);
if (mrt == NULL)
return NULL;
+ write_pnet(&mrt->net, net);
mrt->id = id;
/* Forwarding cache */
@@ -580,7 +584,7 @@ static inline void ipmr_cache_free(struct mfc_cache *c)
static void ipmr_destroy_unres(struct mr_table *mrt, struct mfc_cache *c)
{
- struct net *net = NULL; //mrt->net;
+ struct net *net = read_pnet(&mrt->net);
struct sk_buff *skb;
struct nlmsgerr *e;