tree 7ccc98a3ef1be4ca3129de23b083ab2bc47eb5c3
parent a8ddc9163c6a16cd62531dba1ec5020484e33b02
author Pavel Emelyanov <xemul@openvz.org> 1217489932 -0700
committer David S. Miller <davem@davemloft.net> 1217489932 -0700

netfilter: xt_hashlimit: fix race between htable_destroy and htable_gc

Deleting a timer with del_timer doesn't guarantee, that the
timer function is not running at the moment of deletion. Thus
in the xt_hashlimit case we can get into a ticklish situation
when the htable_gc rearms the timer back and we'll actually
delete an entry with a pending timer.

Fix it with using del_timer_sync().

AFAIK del_timer_sync checks for the timer to be pending by
itself, so I remove the check.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>