* irda: BUG: looking up invalid subclass: 4294967295
@ 2014-02-10 21:31 Dave Jones
2014-02-10 21:39 ` Peter Zijlstra
0 siblings, 1 reply; 2+ messages in thread
From: Dave Jones @ 2014-02-10 21:31 UTC (permalink / raw)
To: Peter Zijlstra; +Cc: netdev
Is this irda being crap, or some weird lockdep corner case ?
(no idea what the W taint was, some unrelated spew pushed it out
of the dmesg buffer before it got chance to hit the log)
Dave
BUG: looking up invalid subclass: 4294967295
turning off the locking correctness validator.
CPU: 0 PID: 1965 Comm: trinity-main Tainted: G W 3.14.0-rc1+ #108
00000000ffffffff 00000000a8765326 ffff880205ee7c40 ffffffff9872ae0a
00000000ffffffff ffff880205ee7c58 ffffffff9872732c ffff880084069730
ffff880205ee7cd0 ffffffff980c10e2 000000010016000f 00000000ffffffff
Call Trace:
[<ffffffff9872ae0a>] dump_stack+0x4e/0x7a
[<ffffffff9872732c>] look_up_lock_class.part.18+0x2f/0x34
[<ffffffff980c10e2>] __lock_acquire.isra.28+0x722/0xa50
[<ffffffff9873a01b>] ? preempt_count_sub+0x6b/0xf0
[<ffffffff980c1b6d>] lock_acquire+0x8d/0x120
[<ffffffffc05438f2>] ? hashbin_delete+0xf2/0x100 [irda]
[<ffffffffc0545e30>] ? irias_delete_value+0x30/0x30 [irda]
[<ffffffff987357fc>] _raw_spin_lock_irqsave_nested+0x4c/0x70
[<ffffffffc05438f2>] ? hashbin_delete+0xf2/0x100 [irda]
[<ffffffffc05438f2>] hashbin_delete+0xf2/0x100 [irda]
[<ffffffffc0546266>] __irias_delete_object+0x26/0x40 [irda]
[<ffffffffc05462a4>] irias_delete_object+0x24/0x30 [irda]
[<ffffffffc05489a5>] irda_release+0x65/0x160 [irda]
[<ffffffff985fa59f>] sock_release+0x1f/0x80
[<ffffffff985fa612>] sock_close+0x12/0x20
[<ffffffff981bf0fa>] __fput+0xea/0x2c0
[<ffffffff981bf31e>] ____fput+0xe/0x10
[<ffffffff98090924>] task_work_run+0xb4/0xe0
[<ffffffff9806e791>] do_exit+0x2e1/0xb50
[<ffffffff980ab791>] ? vtime_account_user+0x91/0xa0
[<ffffffff9814f69b>] ? context_tracking_user_exit+0x9b/0x100
[<ffffffff9806ffec>] do_group_exit+0x4c/0xc0
[<ffffffff98070074>] SyS_exit_group+0x14/0x20
[<ffffffff9873e66a>] tracesys+0xd4/0xd9
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: irda: BUG: looking up invalid subclass: 4294967295
2014-02-10 21:31 irda: BUG: looking up invalid subclass: 4294967295 Dave Jones
@ 2014-02-10 21:39 ` Peter Zijlstra
0 siblings, 0 replies; 2+ messages in thread
From: Peter Zijlstra @ 2014-02-10 21:39 UTC (permalink / raw)
To: Dave Jones; +Cc: netdev
On Mon, Feb 10, 2014 at 04:31:26PM -0500, Dave Jones wrote:
> Is this irda being crap, or some weird lockdep corner case ?
>
> (no idea what the W taint was, some unrelated spew pushed it out
> of the dmesg buffer before it got chance to hit the log)
>
> Dave
>
> BUG: looking up invalid subclass: 4294967295
That's -1 if I'm not mistaken, that's indeed an invalid subclass.
> turning off the locking correctness validator.
> CPU: 0 PID: 1965 Comm: trinity-main Tainted: G W 3.14.0-rc1+ #108
> 00000000ffffffff 00000000a8765326 ffff880205ee7c40 ffffffff9872ae0a
> 00000000ffffffff ffff880205ee7c58 ffffffff9872732c ffff880084069730
> ffff880205ee7cd0 ffffffff980c10e2 000000010016000f 00000000ffffffff
> Call Trace:
> [<ffffffff9872ae0a>] dump_stack+0x4e/0x7a
> [<ffffffff9872732c>] look_up_lock_class.part.18+0x2f/0x34
> [<ffffffff980c10e2>] __lock_acquire.isra.28+0x722/0xa50
> [<ffffffff9873a01b>] ? preempt_count_sub+0x6b/0xf0
> [<ffffffff980c1b6d>] lock_acquire+0x8d/0x120
> [<ffffffffc05438f2>] ? hashbin_delete+0xf2/0x100 [irda]
> [<ffffffffc0545e30>] ? irias_delete_value+0x30/0x30 [irda]
> [<ffffffff987357fc>] _raw_spin_lock_irqsave_nested+0x4c/0x70
> [<ffffffffc05438f2>] ? hashbin_delete+0xf2/0x100 [irda]
> [<ffffffffc05438f2>] hashbin_delete+0xf2/0x100 [irda]
I tried looking at that code but gave up real quick.. That code is
'creative'.
^ permalink raw reply [flat|nested] 2+ messages in thread
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