commit 3885ca785a3618593226687ced84f3f336dc3860
author Neil Horman <nhorman@tuxdriver.com> Fri Apr 27 10:11:49 2012 +0000
committer David S. Miller <davem@davemloft.net> Sat Apr 28 02:18:48 2012 -0400
tree a6b5af980c1295aaeee69749d4d79d47e072321a
parent cde2e9a651b76d8db36ae94cd0febc82b637e5dd

drop_monitor: Make updating data->skb smp safe

Eric Dumazet pointed out to me that the drop_monitor protocol has some holes in
its smp protections.  Specifically, its possible to replace data->skb while its
being written.  This patch corrects that by making data->skb an rcu protected
variable.  That will prevent it from being overwritten while a tracepoint is
modifying it.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: David Miller <davem@davemloft.net>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>