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ipv4: make ip_append_data() handle NULL routing table

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Add a check in ip_append_data() for NULL *rtp to prevent future bugs in
callers from being exploitable.

Signed-off-by: Julien Tinnes <[email protected]>
Signed-off-by: Tavis Ormandy <[email protected]>
Acked-by: David S. Miller <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Julien TINNES 2009-08-27 15:26:58 +02:00 • committed by Linus Torvalds
commit 788d908f28
1 changed files with 2 additions and 0 deletions
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2
net/ipv4/ip_output.c
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@ -813,6 +813,8 @@ int ip_append_data(struct sock *sk,
inet->cork.addr = ipc->addr;
}
rt = *rtp;
if (unlikely(!rt))
return -EFAULT;
/*
* We steal reference to this route, caller should not release it
*/