linux-kernel - Re: [usb gadget] WARNING: at kernel/mutex.c:198 __mutex_lock

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 02 Mar 2013 14:41:07 +0100
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Fengguang Wu <fengguang.wu@...el.com>
CC:	Felipe Balbi <balbi@...com>,
	Maarten Lankhorst <m.b.lankhorst@...il.com>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [usb gadget] WARNING: at kernel/mutex.c:198 __mutex_lock_common()

On 03/02/2013 02:37 PM, Fengguang Wu wrote:
> On Wed, Feb 27, 2013 at 12:49:35PM +0200, Felipe Balbi wrote:
>> Hi,
>>
>> On Wed, Feb 06, 2013 at 10:04:24AM +0800, Fengguang Wu wrote:
>>> Greetings,
>>>
>>> I got the below warning and the first bad commit is
>>
>> can you send a fixup patch ?
> 
> Sorry I don't have the fix. Maarten once proposed
> 
> : Can you change __mutex_lock_common from inline to __always_inline and
> : check if that gets rid of the warning?
> 
> and it worked at that time, however it does not work today when I
> go out to double check the below patch...

This does not get even close to a fix, not to mention a proper one. The
problem is that a spinlock is hold while a mutex is going to be taken.
Maybe I get to this…

Sebastian
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/