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Re: [PATCH] bridge: Fix potential deadlock on br->multicast_lock [message #44076]

Mon, 14 November 2011 05:39

davem
Messages: 463
Registered: February 2006

Senior Member

From: Andrew Vagin <avagin@openvz.org>
Date: Thu, 10 Nov 2011 18:48:03 +0300

> multicast_lock is taken in softirq context, so we should use
> spin_lock_bh() in userspace.
>
> call-chain in softirq context:
> run_timer_softirq()
> br_multicast_query_expired()
>
> call-chain in userspace:
> sysfs_write_file()
> store_multicast_snooping()
> br_multicast_toggle()
>
> Signed-off-by: Andrew Vagin <avagin@openvz.org>

Applied, thanks.

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