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ip_gre: fix a possible crash in parse_gre_header()
authorEric Dumazet <edumazet@google.com>
Thu, 4 Apr 2013 15:41:27 +0000 (15:41 +0000)
committerDavid S. Miller <davem@davemloft.net>
Mon, 8 Apr 2013 16:00:17 +0000 (12:00 -0400)
pskb_may_pull() can change skb->head, so we must init iph/greh after
calling it.

Bug added in commit c54419321455 (GRE: Refactor GRE tunneling code.)

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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