* [Qemu-devel] Possible bug when executing an instruction.
@ 2015-11-17 1:44 Toni Nedialkov
2015-11-17 17:14 ` John Snow
0 siblings, 1 reply; 3+ messages in thread
From: Toni Nedialkov @ 2015-11-17 1:44 UTC (permalink / raw)
To: qemu-devel
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There is some evidence to suggest that the instruction mulx rsp,rsp,rdx
causes a segfault in QEMU.
Was wondering if anyone would be kind enough to verify. And since I am not
familiar with the bug reporting process, I am posting here.
Thank you.
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] Possible bug when executing an instruction.
2015-11-17 1:44 [Qemu-devel] Possible bug when executing an instruction Toni Nedialkov
@ 2015-11-17 17:14 ` John Snow
2015-11-17 18:13 ` Eric Blake
0 siblings, 1 reply; 3+ messages in thread
From: John Snow @ 2015-11-17 17:14 UTC (permalink / raw)
To: Toni Nedialkov, qemu-devel
On 11/16/2015 08:44 PM, Toni Nedialkov wrote:
> There is some evidence to suggest that the instruction mulx rsp,rsp,rdx
> causes a segfault in QEMU.
>
> Was wondering if anyone would be kind enough to verify. And since I am
> not familiar with the bug reporting process, I am posting here.
>
> Thank you.
Do you have any additional details to share, such as a reproducer or any
evidence you've gathered to suggest the above?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] Possible bug when executing an instruction.
2015-11-17 17:14 ` John Snow
@ 2015-11-17 18:13 ` Eric Blake
0 siblings, 0 replies; 3+ messages in thread
From: Eric Blake @ 2015-11-17 18:13 UTC (permalink / raw)
To: John Snow, Toni Nedialkov, qemu-devel
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On 11/17/2015 10:14 AM, John Snow wrote:
>
>
> On 11/16/2015 08:44 PM, Toni Nedialkov wrote:
>> There is some evidence to suggest that the instruction mulx rsp,rsp,rdx
>> causes a segfault in QEMU.
>>
>> Was wondering if anyone would be kind enough to verify. And since I am
>> not familiar with the bug reporting process, I am posting here.
>>
>> Thank you.
>
> Do you have any additional details to share, such as a reproducer or any
> evidence you've gathered to suggest the above?
Looks like a patch has already been proposed:
https://lists.gnu.org/archive/html/qemu-devel/2015-11/msg03848.html
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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2015-11-17 18:13 ` Eric Blake
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