tree cd44cd81f85c3904340f5cef1a359e2ae97a0c20
parent 29abe2fda54f8e16ecff5d76d96325f31508d5ba
author Eric Dumazet <edumazet@google.com> 1409808116 -0700
committer David S. Miller <davem@davemloft.net> 1409962550 -0700

ipv4: fix a race in update_or_create_fnhe()

nh_exceptions is effectively used under rcu, but lacks proper
barriers. Between kzalloc() and setting of nh->nh_exceptions(),
we need a proper memory barrier.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Fixes: 4895c771c7f00 ("ipv4: Add FIB nexthop exceptions.")
Signed-off-by: David S. Miller <davem@davemloft.net>