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Bug#255175: kernel-image-2.4.26-1-686: system crash due to kernel bug



severity 255175 critical
thanks

I upgraded some time ago the kernel-image to kernel-image-2.4.26-1-686,
version 2.4.26-2 (in testing at the moment) and these oops appear
frequently (I would even say that with a higher frequency that with
previous version 2.4.26-1, but I have not investigated in depth). My system
still crashes from time to time (it will not stay up for more than a week).
It usually will start first spouting some 'Unable to handle kernel paging
request at virtual address' oopses but it will keep running, however, at
some point, and after some time (see attached syslog) it will start to send
oops: 'kernel BUG at page_alloc.c:221!' (sometimes page_alloc.c:113)
whenever a process is spawned, rendering the system unusable. In this
situation only a hard reboot can make it recover.

I'm consequently raising this bug's priority, because this kernel image
makes the system quite unstable. I don't know if this affects version
2.4.26-4 (in sid at the moment) too, it's not easy to reproduce, but I will
install that kernel version and see what happens.

Attached is a capture of the different oops I've encountered at different
points before the system crash, these were copy&pasted directly from the
screen. Also attached are the kernel oops that syslog recorded (as you can
see, not all of them are included). Also, in case it's useful, I'm
providing the output of ksymoops using this oops file. Most of the tasks
associated with the oops are usually cron tasks and the system has plenty
of swap space.

If there is anything I can do to provide additional info, feel free to ask. 
Since I don't really know what causes it I'm at a loss in order to 
reproduce it.

Thanks

Javier

Attachment: ksymoops.gz
Description: Binary data

Attachment: oops-multiple.gz
Description: Binary data

Attachment: syslog-oops.gz
Description: Binary data

Attachment: signature.asc
Description: Digital signature


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