linux-kernel - workqueue: WARN at at kernel/workqueue.c:2176

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Message-ID: <537119EF.2060102@oracle.com>
Date:	Mon, 12 May 2014 14:58:55 -0400
From:	Sasha Levin <sasha.levin@...cle.com>
To:	LKML <linux-kernel@...r.kernel.org>
CC:	Tejun Heo <tj@...nel.org>, Dave Jones <davej@...hat.com>
Subject: workqueue: WARN at at kernel/workqueue.c:2176

Hi all,

While fuzzing with trinity inside a KVM tools guest running the latest -next
kernel I've stumbled on the following spew:

[ 1297.886670] WARNING: CPU: 0 PID: 190 at kernel/workqueue.c:2176 process_one_work+0xb5/0x6f0()
[ 1297.889216] Modules linked in:
[ 1297.890306] CPU: 0 PID: 190 Comm: kworker/3:0 Not tainted 3.15.0-rc5-next-20140512-sasha-00019-ga20bc00-dirty #456
[ 1297.893258]  0000000000000009 ffff88010c5d7ce8 ffffffffb153e1ec 0000000000000002
[ 1297.893258]  0000000000000000 ffff88010c5d7d28 ffffffffae15fd6c ffff88010cdd6c98
[ 1297.893258]  ffff8806285d4000 ffffffffb3cd09e0 ffff88010cdde000 0000000000000000
[ 1297.893258] Call Trace:
[ 1297.893258] dump_stack (lib/dump_stack.c:52)
[ 1297.893258] warn_slowpath_common (kernel/panic.c:430)
[ 1297.893258] warn_slowpath_null (kernel/panic.c:465)
[ 1297.893258] process_one_work (kernel/workqueue.c:2174 (discriminator 38))
[ 1297.893258] worker_thread (kernel/workqueue.c:2354)
[ 1297.893258] ? rescuer_thread (kernel/workqueue.c:2303)
[ 1297.893258] kthread (kernel/kthread.c:210)
[ 1297.893258] ? kthread_create_on_node (kernel/kthread.c:176)
[ 1297.893258] ret_from_fork (arch/x86/kernel/entry_64.S:553)
[ 1297.893258] ? kthread_create_on_node (kernel/kthread.c:176)


Thanks,
Sasha
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