diff options
author | Julien TINNES <julien@cr0.org> | 2009-08-27 09:26:58 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-08-27 15:23:43 -0400 |
commit | 788d908f2879a17e5f80924f3da2e23f1034482d (patch) | |
tree | 890ada4f22e9ce5d64a121efc1ca63390d6b2100 /net | |
parent | 9886e836a6a5dbd273dc55b17e713f0a188d137f (diff) |
ipv4: make ip_append_data() handle NULL routing table
Add a check in ip_append_data() for NULL *rtp to prevent future bugs in
callers from being exploitable.
Signed-off-by: Julien Tinnes <julien@cr0.org>
Signed-off-by: Tavis Ormandy <taviso@sdf.lonestar.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net')
-rw-r--r-- | net/ipv4/ip_output.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index 7d0821054729..7ffcd96fe591 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c | |||
@@ -813,6 +813,8 @@ int ip_append_data(struct sock *sk, | |||
813 | inet->cork.addr = ipc->addr; | 813 | inet->cork.addr = ipc->addr; |
814 | } | 814 | } |
815 | rt = *rtp; | 815 | rt = *rtp; |
816 | if (unlikely(!rt)) | ||
817 | return -EFAULT; | ||
816 | /* | 818 | /* |
817 | * We steal reference to this route, caller should not release it | 819 | * We steal reference to this route, caller should not release it |
818 | */ | 820 | */ |