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| author | Eric Leblond <eric@regit.org> | 2012-11-06 02:10:10 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-07 15:40:14 -0500 |
| commit | a3d744e995d2b936c500585ae39d99ee251c89b4 (patch) | |
| tree | f4805035e24dcad88cc45ff55ac70ef9de9a3b62 /net | |
| parent | 3015f3d2a3cd9614294025849d3ed89fd2f3a7f5 (diff) | |
| download | linux-a3d744e995d2b936c500585ae39d99ee251c89b4.tar.gz | |
af-packet: fix oops when socket is not present
Due to a NULL dereference, the following patch is causing oops in normal trafic condition: commit c0de08d04215031d68fa13af36f347a6cfa252ca Author: Eric Leblond <eric@regit.org> Date: Thu Aug 16 22:02:58 2012 +0000 af_packet: don't emit packet on orig fanout group This buggy patch was a feature fix and has reached most stable branches. When skb->sk is NULL and when packet fanout is used, there is a crash in match_fanout_group where skb->sk is accessed. This patch fixes the issue by returning false as soon as the socket is NULL: this correspond to the wanted behavior because the kernel as to resend the skb to all the listening socket in this case. Signed-off-by: Eric Leblond <eric@regit.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/dev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 09cb3f6dc40c..bda6d004f9f0 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1666,7 +1666,7 @@ static inline int deliver_skb(struct sk_buff *skb, static inline bool skb_loop_sk(struct packet_type *ptype, struct sk_buff *skb) { - if (ptype->af_packet_priv == NULL) + if (!ptype->af_packet_priv || !skb->sk) return false; if (ptype->id_match) |