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Bug#590658: BUG in kmem_cache_alloc called by gss_create_cred



Le 11/27/2011 07:28 AM, Jonathan Nieder a écrit :
tags 590658 + moreinfo
quit

Hi Victor,

Victor Gomes Do Vale wrote:

I have a desktop machine running debian lenny, with nfs4/kerberos
for home directory accounting, which works great on my own machine.

But on a specific machine, it kernel panics all nights, when the
user come back the day, the machine is freezed, sometime I have logs
of the kernel Oops, when i have an open ssh connection to the
machine :
[...]
It seems to happened always on the same stack state
(kmem_cache_alloc/gss... etc ...)
I keep the machine up to date, but it does not correct the problem. If
someone could correct that ...
[...]
Well, I tested the memory with memtest86, it gave me nothing (2 pass clear).
I booted and set the X with vesa mode and nvidia unloaded yesterday, the
machine was dead this morning.
Thanks for reporting it.  Basic questions:

  - Are you still using this machine?  If so, how are you coping? ---
    what kernel do you use, did you find any workarounds, etc

  - If the slab corruption stopped happening at some point, do you
    remember when and whether anything interesting happened at the
    time?  /var/log/dpkg.log* might have clues.

  - If the symptoms are still reproducible, please attach a log of the
    kernel's initialization (you can get it by capturing full "dmesg"
    output immediately after booting or by collecting from
    /var/log/dmesg*).

  - I assume this was not a regression, and that you always
    experienced these problems on this machine?

  - Any other clues or weird symptoms would be useful, too.

Hope that helps,
Jonathan
Hi,

Sorry for the late answer, well the only way i found to bypass this problem is one of those two options :
- Move the machine to squeeze...
- use the lenny-backports and change the kernel to 2.6.32-bpo ...
No more logs other ways, i think it might be a kernel problem on the nfs4 kerberized implementation. for old machines i used lenny-backports on squeeze for newly installed machines, no more bug since then. Cannot be 100% sure of it, since it was a random bug, so far so good no problem since i applied this workarround.
Thanks for asking.

--
Victor



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