net: ipv4: Don't crash if passing a null sk to ip_do_redirect.
authorLorenzo Colitti <lorenzo@google.com>
Thu, 22 Dec 2016 15:33:57 +0000 (00:33 +0900)
committerDavid S. Miller <davem@davemloft.net>
Thu, 22 Dec 2016 16:15:10 +0000 (11:15 -0500)
commit7d99569460eae28b187d574aec930a4cf8b90441
tree99477f48a607f4825a46f987a5f26c40b3041444
parent551cde192343a10c8fbd57c4cc8f0c4b6cd307e4
net: ipv4: Don't crash if passing a null sk to ip_do_redirect.

Commit e2d118a1cb5e ("net: inet: Support UID-based routing in IP
protocols.") made ip_do_redirect call sock_net(sk) to determine
the network namespace of the passed-in socket. This crashes if sk
is NULL.

Fix this by getting the network namespace from the skb instead.

Fixes: e2d118a1cb5e ("net: inet: Support UID-based routing in IP protocols.")
Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/route.c