On Fri, 05 Jul 2013 at 04:30 GMT, Robert Hancock <hancock...@gmail.com> wrote:
> I've run into a problem after updating to Fedora 19 where if I shut down
> a Windows 7 KVM virtual machine, the machine hits a kernel panic. There
> are a few reports of this on 3.9.8 and 3.9.9 kernels here:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=981437
>
> The panic is "kernel BUG at kernel/timer.c:729!" and the stack traces
> all seem basically the same, something like this one (captured with kdump):
>
> #7 [ffff880214d25c10] mod_timer+501 at ffffffff8106d905
> #8 [ffff880214d25c50] br_multicast_del_pg.isra.20+261 at
> ffffffffa0731d25 [bridge]
Yeah, I got some similar bug report on Fedora...
Could you try the following patch? Thanks!
----------
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 81befac..69af490 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -270,7 +270,7 @@ static void br_multicast_del_pg(struct net_bridge *br,
del_timer(&p->timer);
call_rcu_bh(&p->rcu, br_multicast_free_pg);
- if (!mp->ports && !mp->mglist &&
+ if (!mp->ports && !mp->mglist && mp->timer_armed &&
netif_running(br->dev))
mod_timer(&mp->timer, jiffies);
--
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