Re: oops mm/slab.c:1563 on 2.5.68

From: Manfred Spraul (manfred@colorfullife.com)
Date: Tue Apr 29 2003 - 15:46:06 EST

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Maybe in reply to: Nicolas: "oops mm/slab.c:1563 on 2.5.68"
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Nicolas wrote:

>Apr 29 17:37:00 hal9003 kernel: drivers/usb/media/ov511.c: Invalid channel
>(-1)
>Apr 29 17:37:31 hal9003 last message repeated 123 times
>Apr 29 17:37:52 hal9003 last message repeated 89 times
>Apr 29 17:37:53 hal9003 kernel: ------------[ cut here ]------------
>Apr 29 17:37:53 hal9003 kernel: kernel BUG at mm/slab.c:1563!
>
You are running with slab debugging enabled, and the internal self test
noticed a corrupted object list.

>Apr 29 17:37:53 hal9003 kernel: invalid operand: 0000 [#1]
>Apr 29 17:37:53 hal9003 kernel: CPU: 0
>Apr 29 17:37:53 hal9003 kernel: EIP: 0060:[cache_alloc_refill+533/616]
>
The error is noticed during allocation

>Apr 29 17:37:53 hal9003 kernel: [copy_mm+456/864] copy_mm+0x1c8/0x360
>
>
of an mm_struct object.

It looks like a double-free. It was not detected during free, because
mm_struct's are larger than 512 bytes, and thus not redzoned.

Is this the first oops that occured since reboot, or were there previous
messages?

Could you provide further details about your system?

-- Manfred

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