From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe Subject: Re: KVM segfaults with 3.5 while installing ubuntu 12.04 Date: Tue, 31 Jul 2012 19:30:47 +0200 Message-ID: <50181647.5000701@profihost.ag> References: <5017C8A0.60506@profihost.ag> <5017F19E.4070308@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Cc: mtosatti@redhat.com, kvm@vger.kernel.org, LKML To: Avi Kivity Return-path: In-Reply-To: <5017F19E.4070308@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org Am 31.07.2012 16:54, schrieb Avi Kivity: > On 07/31/2012 02:59 PM, Stefan Priebe - Profihost AG wrote: >> Hello list, >> >> i hope it is correct to list the maintainers of kvm. While trying to >> install ubuntu 12.04 amd64 on a kvm based vm the KVM process segfaults >> while ubuntu tries to detect the HW: >> kvm[2978]: segfault at 7fb90d9035e0 ip 00007fb90d9035e0 >> sp00007fff652e4ed8 error 15 >> >> This does not happen with a rhel6 based 2.6.32 kernel so i thought this >> must be a bug in vanilla 3.5.0 kernel. >> >> Is this known? What information do you need? >> > Please build qemu with debug information, generate a core, and post a > backtrace. mhm tried that but i can't get it to work: gdb /usr/bin/qemu-system-x86_64 /core GNU gdb (GDB) 7.0.1-debian Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". For bug reporting instructions, please see: ... warning: The current binary is a PIE (Position Independent Executable), which GDB does NOT currently support. Most debugger features will fail if used in this session. Reading symbols from /usr/bin/qemu-system-x86_64...done. warning: core file may not match specified executable file. [New Thread 2222] [New Thread 1809] [New Thread 1811] [New Thread 1807] [New Thread 1812] [New Thread 1810] [New Thread 1813] [New Thread 1806] [New Thread 1808] Core was generated by `/usr/bin/qemu-system-x86_64 -id 103 -chardev socket,id=qmp,path=/var/run/qemu-s'. Program terminated with signal 11, Segmentation fault. #0 0x00007f6ca10faed8 in ?? () (gdb) where #0 0x00007f6ca10faed8 in ?? () #1 0x00007f6ca54e0098 in ?? () #2 0x00007f6ca10faf18 in ?? () #3 0x00007f6ca10fae98 in ?? () #4 0x00007fffc18a5330 in ?? () #5 0x40620711c948c800 in ?? () #6 0x00007fffc18a51f0 in ?? () #7 0x00007f6ca54e0e25 in ?? () #8 0x00007f6ca10faf18 in ?? () #9 0x00007f6ca10fae98 in ?? () #10 0x0000000000000000 in ?? () Greets, Stefan