Re: linux-image-2.6.32-5-686: kernel BUG at ... build/source_i386_none/drivers/md/raid5.c:2764!

[Jose Manuel dos Santos Calhariz <jose.spam@netvisao.pt>]

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On Sun, Jun 24, 2012 at 06:21:46PM +1000, NeilBrown wrote:
> On Fri, 22 Jun 2012 13:19:53 +0100 Jose Manuel dos Santos Calhariz
> <jose.spam@netvisao.pt> wrote:
> 
> > 
> > In another day during the periodic mdadm RAID check: 
> >  - the linux kernel gave a kernel BUG, 
> >  - tried to kick out a failed disk and 
> >  - stopped accepting I/O to the affected raid.  
> > 
> > The affected programs were in state D.  The only way to recover was to
> > do a reboot.  After reboot the problematic disk was replaced.
> > 
> > I reported the bug to Debian and is there all the information about it:
> > 
> > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=675969
> > 
> > I was asked to report the BUG here in case someone knows what happened.
> > 
> > Here is a summary of the more relevant information:
> > 
> > This machine have 2 x RAID6 with 6 disks each, for a total of 12 disks. 
> > 
> > I have 5 systems with a similar setup and only one failed, maybe
> > because of the failing disk.  I will use one of the systems to try to
> > reproduce the bug, before triyng a new kernel.
> > 
> > 
> > The proprietary module is the openafs filesystem v1.6.1 backported
> > from Debian testing.
> > 
> > The kernel bug is:
> > 
> > 
> > build/source_i386_none/drivers/md/raid5.c:2764!

> 
> This bug was fixed in 2.6.32.49 and 3.2
> 
> http://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=commitdiff;h=61d433c479a6ccfed6a7e73e6111ca8fa0348c63
> 
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=9a3f530f39f4490eaa18b02719fb74ce5f4d2d86
> 
> NeilBrown

The failing kernel had that fix all ready.  The machine was running
the kernel Debian 2.6.32-41squeeze2.  Looking into the change log,
this kernel have all the fixes until 2.6.32.51 plus other fixes.

     Jose Calhariz

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