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SubjectRe: 2.6.6-mm1
Sid Boyce <sboyce@blueyonder.co.uk> wrote:
>
> Oops on x86_only, x86_64 is OK.
>
> ...
> Unable to handle kernel NULL pointer dereference at virtual address 00000000
> printing eip:
> c0163921
> *pde = 00000000
> Oops: 0000 [#1]
> PREEMPT DEBUG_PAGEALLOC
> CPU: 0
> EIP: 0060:[<c0163921>] Not tainted VLI
> EFLAGS: 00010296 (2.6.6-mm1)
> EIP is at locks_alloc_lock+0x1/0x20
> eax: de016f6c ebx: bffff1e0 ecx: bffff1e0 edx: 00000007
> esi: bffff1e0 edi: 00000000 ebp: dff7bf90 esp: dff7bf34
> ds: 007b es: 007b ss: 0068
> Process init (pid: 1, threadinfo=dff7b000 task=dff7ca70)
> Stack: dff7bf90 c0165856 00000000 00000246 fffbd13f fffbd13f 00000007 de016f6c
> dff7bf94 c011a52c ffffffff 000001ff bffff008 fa49babf 00000000 003fffff
> 00000000 fffbd13f dff7bf9c dff7bfac bffff1e0 ffffffea 00000000 dff7bfa4
> Call Trace:
> [<c01061e6>] show_stack+0xa6/0xb0
> [<c0106358>] show_registers+0x148/0x1c0
> [<c0106505>] die+0xa5/0x110
> [<c0112682>] do_page_fault+0x3b2/0x538
> [<c0105e55>] error_code+0x2d/0x38
> [<c01618a5>] generic_file_fcntl+0xd5/0x1e0
> [<c0161ae0>] sys_fcntl64+0x80/0xa0
> [<c0105c4b>] syscall_call+0x7/0xb

Is this repeatable? A null-pointer deref at
locks_alloc_lock+0x1/0x20 seems not possible.

Please send the output of

nm -n vmlinux | grep -5 locks_alloc_lock


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