linux-kernel - [signal] BUG: unable to handle kernel NULL pointer dereference at 0000000000000001

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Message-ID: <20120910004753.GB27699@localhost>
Date:	Mon, 10 Sep 2012 08:47:53 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Al Viro <viro@...iv.linux.org.uk>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: [signal] BUG: unable to handle kernel NULL pointer dereference at
 0000000000000001

Al,

Something bad happens since the below commit. Because commit [12/18] f411932
was not tested, it might also be the first bad commit.

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal.git experimental-kernel_thread
head:   a39272019f111865a3e96d57ba94d5eee6df5258
commit: c2865bb326476f031ce7121e876c656cdc12c894 [13/18] x86, um/x86: switch to generic sys_execve and kernel_execve

x86_64-lkp                  b__b___b___b_B__BBB

--
12:	  f411932  
13:	B c2865bb  2012-09-10 kvm-inn      [   11.973701] BUG: unable to handle kernel NULL pointer dereference at 0000000000000001 [vt_console_print no_context number show_stack_log_lvl no_context]
14:	  549bf9c  
15:	  4e382ff  
16:	B 23ddf94  2012-09-10 kvm-inn      [   11.326342] BUG: unable to handle kernel NULL pointer dereference at 0000000000000001 
17:	B f117e2a  2012-09-10 kvm-fat      [   11.364406] BUG: unable to handle kernel NULL pointer dereference at 0000000000000001 
18:	B a392720  2012-09-10 kvm-bens     Kernel crashed on [   11.935581] debug: unmapping init [mem 0xffffffff81bdc000-0xffffffff81e7cfff]
18:	B a392720  2012-09-10 kvm-inn      [   12.531268] BUG: unable to handle kernel NULL pointer dereference at 0000000000000001 
18:	B a392720  2012-09-10 kvm-inn      [   11.507524] BUG: unable to handle kernel NULL pointer dereference at 0000000000000001 
18:	B a392720  2012-09-10 kvm-inn      [   12.871369] BUG: unable to handle kernel NULL pointer dereference at 0000000000000001 
18:	B a392720  2012-09-10 kvm-inn      [   12.695505] BUG: unable to handle kernel NULL pointer dereference at 0000000000000001 
18:	B a392720  2012-09-10 kvm-inn      Kernel crashed on [   12.286565] debug: unmapping init [mem 0xffffffff81bdc000-0xffffffff81e7cfff]
18:	B a392720  2012-09-10 kvm-inn      Kernel crashed on [   12.115451] debug: unmapping init [mem 0xffffffff81bdc000-0xffffffff81e7cfff]
18:	B a392720  2012-09-10 kvm-inn      [   11.268153] BUG: unable to handle kernel NULL pointer dereference at 0000000000000001 
18:	B a392720  2012-09-10 kvm-stoakley Kernel crashed on [   11.172497] debug: unmapping init [mem 0xffffffff81bdc000-0xffffffff81e7cfff]

[   11.921170] debug: unmapping init [mem 0xffffffff81bdc000-0xffffffff81e7cfff]

[   11.973701] BUG: unable to handle kernel NULL pointer dereference at 0000000000000001
[   11.973701] IP: [<ffffffff81380c4b>] vt_console_print+0x22f/0x2fb
[   11.973701] PGD 1b297067 PUD 1b296067 PMD 0 

Thanks,
Fengguang

View attachment "dmesg-kvm-inn-18923-2012-09-10-08-30-28-3.6.0-rc3+-3397" of type "text/plain" (60482 bytes)

View attachment "config-3.6.0-rc3+" of type "text/plain" (67798 bytes)