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udp: fix a race in encap_rcv handling
authorEric Dumazet <eric.dumazet@gmail.com>
Tue, 1 Nov 2011 12:56:59 +0000 (12:56 +0000)
committerDavid S. Miller <davem@davemloft.net>
Wed, 2 Nov 2011 04:51:27 +0000 (00:51 -0400)
udp_queue_rcv_skb() has a possible race in encap_rcv handling, since
this pointer can be changed anytime.

We should use ACCESS_ONCE() to close the race.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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