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ipv4: avoid passing NULL to inet_putpeer() in icmpv4_xrlim_allow() 

inet_getpeer_v4() can return NULL under OOM conditions, and while
inet_peer_xrlim_allow() is OK with a NULL peer, inet_putpeer() will
crash.

This code path now uses the same idiom as the others from:
1d861aa4b3 ("inet: Minimize use of
cached route inetpeer.").

Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Neal Cardwell 2012-11-24 18:54:37 +00:00 committed by David S. Miller
parent 81b401100c
commit e1a676424c
1 changed files with 2 additions and 1 deletions
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3
net/ipv4/icmp.c
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@ -257,7 +257,8 @@ static inline bool icmpv4_xrlim_allow(struct net *net, struct rtable *rt,
struct inet_peer *peer = inet_getpeer_v4(net->ipv4.peers, fl4->daddr, 1);
rc = inet_peer_xrlim_allow(peer,
net->ipv4.sysctl_icmp_ratelimit);
inet_putpeer(peer);
if (peer)
inet_putpeer(peer);
}
out:
return rc;