Bug#932250: Fwd: Bug#932250: linux-image-amd64: random segfaults without taking something down

[a a <m.alfaeko@gmail.com>]

It shouldnt be overheating, because i have custom setting on cpu heatsink fan and the ram module has a own heatsink. Plus i have fan on case which puls out the excees heat. The segfaults happend at low load, maybe it wasnt above P2 power state. Also i have made sure that the cpu doenst exceed 90°C.

Out of tree modules are from virtual box.

After disabling overcommit and apparmor i didnt experience a segfault for now. The segfaults started to dissapeer it seams.

I fear that this might be a bug tied to certain order of instructions. For example if i enable debug it may change order of instruction and the bug doesnt occur.

Reason that i reported this bug with package linux-image-amd64 is that i didnt know about the existence of linux-mage-4.19.0-5-amd64 and i tried to prevent creating bug file for nonexisting package. Should i file another bug and put a link to this report ?

št 18. 7. 2019 o 4:04 Ben Hutchings <ben@decadent.org.uk> napísal(a):

Control: tag -1 moreinfo

On Wed, 2019-07-17 at 01:27 +0200, m.alfaeko@gmail.com wrote:
> Package: linux-image-amd64
> Version: 4.19+105
> Severity: important
>
> Hi.
>
> Im currently running debian buster kernel and i experienced some segfaults.
> Segfaults are random, which prevents me from pinpointing the trigger.
> First i tried disabling overcommit on memory, the behavior stoped.
> Today it started during installing updates for libreoffice. Two first
> segfaults were caused by xfdesktop, the two more with gmain.
> Another odd thing is that the error is in libglib and the code is completly
> identical. The RAM was tested with memtest86+, memtester. Previous release
> with backport kernel was working perfectly even with overcommit. I
> guess there is a small chance of defective hw.

Could it be overheating?

> My next suspect is apparmor. Im going to use the system with disabled
> apparmor to see if this problem persist.

What about the out-of-tree module you are using?  Can you run without
that?

> Thank you
>
> I hope this helps make debian more stable and reliable.
[...]

Well, it isn't as helpful as it could be, because you chose to ignore
the request to report a bug against linux-image-4.19.0-5-amd64.

Ben.

--
Ben Hutchings
Any sufficiently advanced bug is indistinguishable from a feature.