linux-kernel - lock_task_group_list() can be called from the atomic context

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Message-Id: <1202731747.13118.20.camel@iris.sw.ru>
Date:	Mon, 11 Feb 2008 15:09:07 +0300
From:	"Denis V. Lunev" <den@...ru>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org
Subject: lock_task_group_list() can be called from the atomic context

Hello, Ingo!

I am seeing the following calltrace every day I am connecting to my test
host by the gnome-panel:
   ssh -Y test.host gnome-terminal

BUG: sleeping function called from invalid context
at /home/den/src/linux-netns26/kernel/mutex.c:209
in_atomic():1, irqs_disabled():0
no locks held by swapper/0.
Pid: 0, comm: swapper Not tainted 2.6.24 #304

Call Trace:
 <IRQ>  [<ffffffff80252d1e>] ? __debug_show_held_locks+0x15/0x27
 [<ffffffff8022c2a8>] __might_sleep+0xc0/0xdf
 [<ffffffff8049f1df>] mutex_lock_nested+0x28/0x2a9
 [<ffffffff80231294>] sched_destroy_group+0x18/0xea
 [<ffffffff8023e835>] sched_destroy_user+0xd/0xf
 [<ffffffff8023e8c1>] free_uid+0x8a/0xab
 [<ffffffff80233e24>] __put_task_struct+0x3f/0xd3
 [<ffffffff80236708>] delayed_put_task_struct+0x23/0x25
 [<ffffffff8026fda7>] __rcu_process_callbacks+0x8d/0x215
 [<ffffffff8026ff52>] rcu_process_callbacks+0x23/0x44
 [<ffffffff8023a2ae>] __do_softirq+0x79/0xf8
 [<ffffffff8020f8c3>] ? profile_pc+0x2a/0x67
 [<ffffffff8020d38c>] call_softirq+0x1c/0x30
 [<ffffffff8020f689>] do_softirq+0x61/0x9c
 [<ffffffff8023a233>] irq_exit+0x51/0x53
 [<ffffffff8021bd1a>] smp_apic_timer_interrupt+0x77/0xad
 [<ffffffff8020ce3b>] apic_timer_interrupt+0x6b/0x70
 <EOI>  [<ffffffff8020b0dd>] ? default_idle+0x43/0x76
 [<ffffffff8020b0db>] ? default_idle+0x41/0x76
 [<ffffffff8020b09a>] ? default_idle+0x0/0x76
 [<ffffffff8020b186>] ? cpu_idle+0x76/0x98

Config is attached.

The kernel is today pulled Dave Miller's tree.

Regards,
	Den

View attachment ".config" of type "text/plain" (48409 bytes)