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| author | Julien TINNES <julien@cr0.org> | 2009-08-27 15:26:58 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-08-27 12:23:43 -0700 |
| commit | 788d908f2879a17e5f80924f3da2e23f1034482d (patch) | |
| tree | 890ada4f22e9ce5d64a121efc1ca63390d6b2100 /net | |
| parent | 9886e836a6a5dbd273dc55b17e713f0a188d137f (diff) | |
| download | lwn-788d908f2879a17e5f80924f3da2e23f1034482d.tar.gz lwn-788d908f2879a17e5f80924f3da2e23f1034482d.zip | |
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, inet->cork.addr = ipc->addr; } rt = *rtp; + if (unlikely(!rt)) + return -EFAULT; /* * We steal reference to this route, caller should not release it */ |