Bug 175791

Summary:	[panic] Fatal trap 12: page fault while in kernel mode at seemingly random times.
Product:	Base System	Reporter:	Dimitri Semitsoglou-Tsiapos <kmhzsem>
Component:	kern	Assignee:	freebsd-bugs (Nobody) <bugs>
Status:	Closed Not Enough Information
Severity:	Affects Only Me	CC:	avos, fk
Priority:	Normal
Version:	9.1-RELEASE
Hardware:	Any
OS:	Any

Description Dimitri Semitsoglou-Tsiapos 2013-02-03 02:50:00 UTC

System seems to crash at random times, during casual desktop use.

During the last crash the system was very low on Free memory (around
100M according to `top`), while swap was not being used.

I'm not sure if the backtrace [1] contains the desired output (seems
to start at /usr/src/sys/kern/kern_shutdown.c).  When running kgdb in
/var/crash the output points to ULE instead [2].

[1] http://sprunge.us/CjHC
[2] http://sprunge.us/SMPa

Comment 1 Fabian Keil 2017-05-25 12:09:31 UTC

The links no longer lead to relevant information.
If you still have the data, you may want to attach it to the report directly.

It would also be useful to know if you can still reproduce the issue
with a more recent FreeBSD version.

Comment 2 Eitan Adler freebsd_committer

2018-05-20 23:49:58 UTC

For bugs matching the following conditions:
- Status == In Progress
- Assignee == "bugs@FreeBSD.org"
- Last Modified Year <= 2017

Do
- Set Status to "Open"

Comment 3 Andriy Voskoboinyk freebsd_committer

2019-02-03 18:55:21 UTC

No backtrace and / or any additional information about the panic; please reopen when crash dumps / backtrace / some additional system configuration will be available.

Kernel dump configuration: https://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug.html
Backtare extraction from the dump: https://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug-gdb.html