tree a6b5af980c1295aaeee69749d4d79d47e072321a
parent cde2e9a651b76d8db36ae94cd0febc82b637e5dd
author Neil Horman <nhorman@tuxdriver.com> 1335521509 +0000
committer David S. Miller <davem@davemloft.net> 1335593928 -0400

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>