Re: qemu-kvm-1.1.0 crashing with kernel 3.5.0-rc6

[Gleb Natapov <gleb@redhat.com>]

On Wed, Jul 11, 2012 at 08:18:17AM +0100, Chris Clayton wrote:
> On 07/11/12 08:12, Gleb Natapov wrote:
> >On Wed, Jul 11, 2012 at 08:09:42AM +0100, Chris Clayton wrote:
> >>Ping.
> >>
> >>Have I committed a bug-reporting sin in the mail below or is
> >>everyone simply too busy to look at this kvm-related crash?
> >>
> >Since you have good and bad points can you bisect the problem?
> >
> 
> Yes, I can bisect, but since the crash occurs with only only one
> combination of qemu-kvm (1.1.0) and kernel (3.5.0-rc6), I'm not sure
> which of those I should bisect. Any ideas on how I could narrow that
> down.
> 
Bisect qemu between qemu-kvm-1.0.1 & qemu-kvm-1.1.0.

> Thanks.
> >>On 07/09/12 11:57, Chris Clayton wrote:
> >>>Hi,
> >>>
> >>>When I run WinXP SP3 through qemu-kvm-1.1.0 on linux kernel 3.5.0-rc6, I
> >>>get a segmentation fault within 3 or 4 minutes maximum. In dmesg I see:
> >>>
> >>>qemu-kvm: sending ioctl 5326 to a partition!
> >>>qemu-kvm: sending ioctl 801c0204 to a partition!
> >>>qemu-kvm: sending ioctl 5326 to a partition!
> >>>qemu-kvm: sending ioctl 801c0204 to a partition!
> >>>qemu-kvm: sending ioctl 5326 to a partition!
> >>>qemu-kvm: sending ioctl 801c0204 to a partition!
> >>>qemu-kvm: sending ioctl 5326 to a partition!
> >>>qemu-kvm: sending ioctl 801c0204 to a partition!
> >>>qemu-kvm[860] general protection ip:b6abad77 sp:b52ff09c error:0 in
> >>>libc-2.16.so[b697d000+1b4000]
> >>>
> >>>The crash does not occur with qemu-kvm-1.0.1 on rc6. Nor does it occur
> >>>qemu-kvm-1.0.1 or qemu-kvm-1.1.0 on kernel 3.4.4. All three combinations
> >>>survive for 15 minutes or more
> >>>
> >>>When I try to get a backtrace with gdb, the screen on which konsole and
> >>>qemu are running locks up until I kill qemu in another console.
> >>>Consequently I can't get a full BT, but, although probably not very
> >>>helpful, what I did get is:
> >>>
> >>>Program received signal SIGSEGV, Segmentation fault.
> >>>[Switching to Thread 0xb6946b40 (LWP 506)]
> >>>0xb7705d77 in __strcmp_sse4_2 () from /lib/libc.so.6
> >>>(gdb) bt
> >>>#0  0xb7705d77 in __strcmp_sse4_2 () from /lib/libc.so.6
> >>>#1  0xb7e8d6e3 in g_str_equal () from /usr/lib/libglib-2.0.so.0
> >>>#2  0xb7e8c94c in g_hash_table_lookup () from /usr/lib/libglib-2.0.so.0
> >>>Cannot access memory at address 0xb694610c
> >>>(gdb)
> >>>
> >>>Note that the gdb and dmesg outputs above are not from the same crash
> >>>instance.
> >>>
> >>>I'm not subscribed,so please cc me on any reply.
> >>>
> >>>Happy to provide any additional diagnostics (but may need help on how to
> >>>get them) or test patches, etc
> >>>
> >>>Thanks
> >>>
> >>>Chris Clayton
> >>
> >>
> >>--
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> >
> >--
> >			Gleb.
> >
> 

--
			Gleb.