Messages in this thread | | | Date | Tue, 13 Nov 2007 13:30:20 -0500 | From | Mark Lord <> | Subject | Re: Oops 2.6.23.1 in ext3+jbd at journal_put_journal_head |
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Jan Kara wrote: > Hello, > >> A one-time event thus far, happened under very heavy I/O, >> Dell i9400 Core2Duo notebook w/3GB ram, single SATA drive with ext3. >> Had to cycle power to get it back and see this Oops in the syslog: .. > Hmm, your pointer to buffer_head in journal_head has been overwritten > by some garbage - it actually looks like ASCII ("C\n ra"). I think your > journal_head pointer is stored in EAX (at least if I compile SMP kernel > for i386 it is) and that is 0xc2bd7000 - start of the page. So probably ..
As for me, I'm guessing a use/free race somewhere, but with only the information from the Oops that's hard to know.
> some driver went wild and overwritten a piece of memory which did not > belong to it... I suggest turning on a few debugging options (like > DEBUG_SLAB) to catch the offender. ..
You mean, like, this:
> # > # Automatically generated make config: don't edit > # Linux kernel version: 2.6.23.1-slab > # Wed Nov 7 08:00:18 2007 > # > CONFIG_X86_32=y ... > CONFIG_DEBUG_SLAB=y ...
Thought since it was..
> A one-time event thus far ... ..
.. I'm unlikely to see it again.
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