diff options
| author | Eric Leblond <eric@regit.org> | 2012-11-06 02:10:10 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-17 13:16:20 -0800 |
| commit | 0f2835b0b762391fb8e1d1da3bdb8f1d90a5d53e (patch) | |
| tree | dddb1503e28d2959af3202657f13a958e3da78f8 | |
| parent | ecdebbf0aedbedc96ee784046d06d0be8152d5a4 (diff) | |
af-packet: fix oops when socket is not present
[ Upstream commit a3d744e995d2b936c500585ae39d99ee251c89b4 ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 82ca51bc29e..24a21f36a47 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1643,7 +1643,7 @@ 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) |