mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-22 00:40:03 +00:00
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 c0de08d042
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>
This commit is contained in:
parent
3015f3d2a3
commit
a3d744e995
1 changed files with 1 additions and 1 deletions
|
@ -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)
|
||||
|
|
Loading…
Reference in a new issue