From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756961Ab0JQNzq (ORCPT ); Sun, 17 Oct 2010 09:55:46 -0400 Received: from mailout-de.gmx.net ([213.165.64.23]:36841 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1756407Ab0JQNzp convert rfc822-to-8bit (ORCPT ); Sun, 17 Oct 2010 09:55:45 -0400 X-Authenticated: #5108953 X-Provags-ID: V01U2FsdGVkX1/kmWNjCi/k6bexvVU5GOuZEXmKz/3VVS4boLE2FK UAuVLnLtzEjIQv From: Toralf =?iso-8859-1?q?F=F6rster?= To: user-mode-linux-devel@lists.sourceforge.net Subject: Re: Fwd: Re: UML kernel crash of v2.6.36-rcX kernel Date: Sun, 17 Oct 2010 15:55:39 +0200 User-Agent: KMail/1.13.5 (Linux/2.6.35.6; KDE/4.4.5; i686; ; ) Cc: Christoph Hellwig , linux-kernel@vger.kernel.org, Richard Weinberger , Al Viro References: <201010131328.06465.toralf.foerster@gmx.de> <201010151133.38170.toralf.foerster@gmx.de> In-Reply-To: <201010151133.38170.toralf.foerster@gmx.de> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT Message-Id: <201010171555.40453.toralf.foerster@gmx.de> X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I bisected it again w/ a fixed test script, got the same bad commit script and double checked, that this commit is really the culprit which crashes a user mode linux kernel at my 32bix x86 stable Gentoo running 2.6.35.6 vanilla kernel as host system and 2/ gcc version 4.4.3 (Gentoo 4.4.3-r2 p1.2) and glibc-2.11.2-r1 in the tool chain. The crash info is ... * Starting local ... [ ok ] Kernel panic - not syncing: Kernel mode fault at addr 0x4, ip 0x80db40a 082fab50: [<08277b7b>] dump_stack+0x22/0x24 082fab68: [<08277bde>] panic+0x61/0xdb 082fab84: [<0805e492>] segv+0x1e2/0x2b0 082fac3c: [<0805e5a1>] segv_handler+0x41/0x60 082fac5c: [<0806ec04>] sig_handler_common+0x54/0xa0 082facd8: [<0806eda7>] sig_handler+0x27/0x50 082face8: [<0806effc>] handle_signal+0x5c/0xa0 082fad0c: [<08071378>] hard_handler+0x18/0x20 082fad1c: [] 0xb7753400 EIP: 0073:[<40000812>] CPU: 0 Not tainted ESP: 007b:bf95171c EFLAGS: 00000212 Not tainted EAX: ffffffda EBX: 08059be8 ECX: 00000054 EDX: bf95174c ESI: 08059bd8 EDI: 40166ff4 EBP: bf951728 DS: 007b ES: 007b 082fab04: [<08075ffd>] show_regs+0xed/0x120 082fab20: [<0805e7dc>] panic_exit+0x2c/0x50 082fab30: [<0809932e>] notifier_call_chain+0x3e/0x70 082fab58: [<080993b3>] atomic_notifier_call_chain+0x23/0x30 082fab68: [<08277c06>] panic+0x89/0xdb 082fab84: [<0805e492>] segv+0x1e2/0x2b0 082fac3c: [<0805e5a1>] segv_handler+0x41/0x60 082fac5c: [<0806ec04>] sig_handler_common+0x54/0xa0 082facd8: [<0806eda7>] sig_handler+0x27/0x50 082face8: [<0806effc>] handle_signal+0x5c/0xa0 082fad0c: [<08071378>] hard_handler+0x18/0x20 082fad1c: [] 0xb7753400 Terminated Toralf Förster wrote at 11:33:37 > Hello, > > git bisect gave : > > tfoerste@n22 ~/devel/linux-2.6 $ git bisect bad > 365b18189789bfa1acd9939e6312b8a4b4577b28 is the first bad commit > commit 365b18189789bfa1acd9939e6312b8a4b4577b28 > Author: Christoph Hellwig > Date: Wed Jul 7 18:53:25 2010 +0200 > > add f_flags to struct statfs(64) > > Add a flags field to help glibc implementing statvfs(3) efficiently. > > We copy the flag values from glibc, and add a new ST_VALID flag to > denote that f_flags is implemented. > > Signed-off-by: Christoph Hellwig > Signed-off-by: Al Viro > -- MfG/Kind regards Toralf Förster pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3