From: Toralf =?utf-8?q?F=C3=B6rster?= <toralf.foerster@gmx.de>
To: user-mode-linux-devel@lists.sourceforge.net
Subject: Re: UML kernel crash of v2.6.36-rcX kernel
Date: Wed, 13 Oct 2010 13:27:19 +0200
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I can reproduce this behaviour with an UML kernel linux-v2.6.36-rc7-153-
g0acc1b2 if I start the UML guest (an almost stable Gentoo) and then run fr=
om=20
the host system (Gentoo too) this:
=C2=A7> wget http://n22_uml/phpsysinfo/
=2D where n22_uml is the guest and the side is an PHP application :=20
http://phpsysinfo.sourceforge.net/

It is not related to PHP and/or apache b/c phpmyadmin works fine. I argue t=
hat=20
sth is wrong with the reading of /proc and/sys files b/c that is the main p=
art=20
of phpsysinfo.

=46urthermore it is a regression b/c 2.6.35 UML kernel works fine.

Here's the kernel info :

 * Starting local ...                                                      =
                                          =20
[ ok ]
Kernel panic - not syncing: Kernel mode fault at addr 0x4, ip 0x80dc41a
082ecb44:  [<0827380b>] dump_stack+0x22/0x24
082ecb5c:  [<08273870>] panic+0x63/0x167
082ecb84:  [<0805e282>] segv+0x1e2/0x2b0
082ecc3c:  [<0805e391>] segv_handler+0x41/0x60
082ecc5c:  [<0806ea54>] sig_handler_common+0x54/0xa0
082eccd8:  [<0806ebf7>] sig_handler+0x27/0x50
082ecce8:  [<0806ee4c>] handle_signal+0x5c/0xa0
082ecd0c:  [<080711c8>] hard_handler+0x18/0x20
082ecd1c:  [<b7862400>] 0xb7862400


EIP: 0073:[<40000812>] CPU: 0 Not tainted ESP: 007b:bfba8c6c EFLAGS: 000002=
12
    Not tainted
EAX: ffffffda EBX: 08059be8 ECX: 00000054 EDX: bfba8c9c
ESI: 08059bd8 EDI: 40166ff4 EBP: bfba8c78 DS: 007b ES: 007b
082ecaf8:  [<08075e4d>] show_regs+0xed/0x120
082ecb14:  [<0805e5cc>] panic_exit+0x2c/0x50
082ecb24:  [<08099c1e>] notifier_call_chain+0x3e/0x70
082ecb4c:  [<08099ca3>] atomic_notifier_call_chain+0x23/0x30
082ecb5c:  [<08273898>] panic+0x8b/0x167
082ecb84:  [<0805e282>] segv+0x1e2/0x2b0
082ecc3c:  [<0805e391>] segv_handler+0x41/0x60
082ecc5c:  [<0806ea54>] sig_handler_common+0x54/0xa0
082eccd8:  [<0806ebf7>] sig_handler+0x27/0x50
082ecce8:  [<0806ee4c>] handle_signal+0x5c/0xa0
082ecd0c:  [<080711c8>] hard_handler+0x18/0x20
082ecd1c:  [<b7862400>] 0xb7862400

Terminated

=2D-=20
MfG/Kind regards
Toralf F=C3=B6rster

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