linux-kernel - Re: [lkp-robot] [mtd] 42e9401bd1: WARNING:at_kernel/locking/lockdep.c:#_

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Message-ID: <20170424065754.pv7rjvf2fckpo2fc@pengutronix.de>
Date:   Mon, 24 Apr 2017 08:57:54 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     kernel test robot <xiaolong.ye@...el.com>
Cc:     Sascha Hauer <s.hauer@...gutronix.de>,
        Brian Norris <computersforpeace@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>, lkp@...org
Subject: Re: [lkp-robot] [mtd]  42e9401bd1:
 WARNING:at_kernel/locking/lockdep.c:#__bfs

Hello,

On Tue, Apr 11, 2017 at 09:47:29AM +0800, kernel test robot wrote:
> 
> FYI, we noticed the following commit:
> 
> commit: 42e9401bd1467d22c4dc4d2c637347b874e6a80b ("mtd: Add partition device node to mtd partition devices")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> 
> in testcase: trinity
> with following parameters:
> 
> 	runtime: 300s
> 
> test-description: Trinity is a linux system call fuzz tester.
> test-url: http://codemonkey.org.uk/projects/trinity/
> 
> 
> on test machine: qemu-system-x86_64 -enable-kvm -m 512M
> 
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
> 
> 
> +--------------------------------------------------------------------------+------------+------------+
> |                                                                          | 89a0d9a9f1 | 42e9401bd1 |
> +--------------------------------------------------------------------------+------------+------------+
> | boot_successes                                                           | 0          | 0          |
> | boot_failures                                                            | 56         | 52         |
> | WARNING:at_drivers/gpu/drm/drm_mode_config.c:#drm_mode_config_cleanup    | 56         | 52         |
> | BUG:unable_to_handle_kernel                                              | 1          | 39         |
> | Oops:#[##]                                                               | 1          | 39         |
> | Kernel_panic-not_syncing:Fatal_exception                                 | 1          | 39         |
> | WARNING:at_kernel/locking/lockdep.c:#__bfs                               | 0          | 39         |
> | BUG:sleeping_function_called_from_invalid_context_at_arch/x86/mm/fault.c | 0          | 39         |
> | WARNING:at_kernel/locking/lockdep.c:#__lock_acquire                      | 0          | 11         |
> | BUG:spinlock_lockup_suspected_on_CPU                                     | 0          | 11         |
> +--------------------------------------------------------------------------+------------+------------+

Did someone look into this? For me this looks like a wrong report, the
attached config doesn't even have MTD_OF_PARTS enabled.
 
Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |