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| author | Zhouyi Zhou <zhouzhouyi@gmail.com> | 2013-03-14 17:21:50 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-15 09:06:58 -0400 |
| commit | aaa0c23cb90141309f5076ba5e3bfbd39544b985 (patch) | |
| tree | b6aa0989e463fbc803474c077e5a3ab512017024 /include/net/dst.h | |
| parent | 1e731cb986d564c4938bcba89ff5f4aea1d8e2fb (diff) | |
| download | linux-stable-aaa0c23cb90141309f5076ba5e3bfbd39544b985.tar.gz linux-stable-aaa0c23cb90141309f5076ba5e3bfbd39544b985.tar.bz2 linux-stable-aaa0c23cb90141309f5076ba5e3bfbd39544b985.zip | |
Fix dst_neigh_lookup/dst_neigh_lookup_skb return value handling bug
When neighbour table is full, dst_neigh_lookup/dst_neigh_lookup_skb will return
-ENOBUFS which is absolutely non zero, while all the code in kernel which use
above functions assume failure only on zero return which will cause panic. (for
example: : https://bugzilla.kernel.org/show_bug.cgi?id=54731).
This patch corrects above error with smallest changes to kernel source code and
also correct two return value check missing bugs in drivers/infiniband/hw/cxgb4/cm.c
Tested on my x86_64 SMP machine
Reported-by: Zhouyi Zhou <zhouzhouyi@gmail.com>
Tested-by: Zhouyi Zhou <zhouzhouyi@gmail.com>
Signed-off-by: Zhouyi Zhou <zhouzhouyi@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/dst.h')
| -rw-r--r-- | include/net/dst.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/net/dst.h b/include/net/dst.h index 853cda11e518..1f8fd109e225 100644 --- a/include/net/dst.h +++ b/include/net/dst.h @@ -413,13 +413,15 @@ static inline int dst_neigh_output(struct dst_entry *dst, struct neighbour *n, static inline struct neighbour *dst_neigh_lookup(const struct dst_entry *dst, const void *daddr) { - return dst->ops->neigh_lookup(dst, NULL, daddr); + struct neighbour *n = dst->ops->neigh_lookup(dst, NULL, daddr); + return IS_ERR(n) ? NULL : n; } static inline struct neighbour *dst_neigh_lookup_skb(const struct dst_entry *dst, struct sk_buff *skb) { - return dst->ops->neigh_lookup(dst, skb, NULL); + struct neighbour *n = dst->ops->neigh_lookup(dst, skb, NULL); + return IS_ERR(n) ? NULL : n; } static inline void dst_link_failure(struct sk_buff *skb) |