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Date: Wed, 21 Jan 2004 14:48:04 -0800
From: Andrew Morton <akpm@osdl.org>
To: Jim Faulkner <jfaulkne@ccs.neu.edu>
Cc: linux-kernel@vger.kernel.org, Andrey Borzenkov <arvidjaar@mail.ru>
Subject: Re: kernel BUG under 2.6.1-mm5
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Jim Faulkner <jfaulkne@ccs.neu.edu> wrote:
>
> 
> Hello,
> 
> I am seeing some scary looking kernel bug entries in my dmesg under
> 2.6.1-mm5.
> ...

> kernel BUG at fs/dcache.c:760!
> invalid operand: 0000 [#1]
> PREEMPT SMP
> CPU:    0
> EIP:    0060:[<c0179627>]    Not tainted VLI
> EFLAGS: 00010287
> EIP is at d_instantiate+0x17/0x90
> eax: f7baf200   ebx: c1b8bac0   ecx: 000021a4   edx: 00000000
> esi: f7a4f868   edi: f7baf200   ebp: f7a4f840   esp: f7a79e3c
> ds: 007b   es: 007b   ss: 0068
> Process hotplug (pid: 24, threadinfo=f7a78000 task=c1b06d00)
> Stack: 00000000 f7a992e4 c1b8bac0 c1b35940 f7a78000 f7a4f840 c01ad6de
> f7a4f840
>        f7baf200 f7a4f840 f7a41e1c c1bbeb40 00000000 c1b06d00 c011f5b0
> 00000000
>        00000000 f7a96d00 c1b06d00 c011bb7d 00000000 c1b06d00 c011f5b0
> 00000000
> Call Trace:
>  [<c01ad6de>] devfs_d_revalidate_wait+0xbe/0x1b0
>  [<c011f5b0>] default_wake_function+0x0/0x20
>  [<c011bb7d>] do_page_fault+0x32d/0x512
>  [<c011f5b0>] default_wake_function+0x0/0x20
>  [<c016e868>] do_lookup+0x68/0xb0
>  [<c016ede8>] link_path_walk+0x538/0xa30
>  [<c016fd03>] open_namei+0x83/0x420
>  [<c011b850>] do_page_fault+0x0/0x512
>  [<c040d4cb>] error_code+0x2f/0x38
>  [<c015e61e>] filp_open+0x3e/0x70
>  [<c015eb9b>] sys_open+0x5b/0x90
>  [<c040c992>] sysenter_past_esp+0x43/0x65

hmm.  There was a patch in that area which I have subsequently dropped
because it was really fixing devfs problems in the wrong place.

Perhaps Andrey can ask you to test a subsequent patch if he takes another
look at this.

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