# letting version tracking do its work
tags 596297 - squeeze
tags 596297 + moreinfo
quit

Hi Stefan,

Stefan Arnold wrote:

> As I told the kernel gave me a error message during unpacking an archive.
> The unrar process did not die and i could not even kill it with -9.

Oh, dear. Sorry for the slow response.

> BUG: unable to handle kernel NULL pointer dereference at 00000800
> IP: [<c10cd8e7>] unmap_underlying_metadata+0x1f/0x3a
> *pde = 00000000
> Oops: 0002 [#1] SMP

Was this reproducible? Is it still?

[...]
> Pid: 5036, comm: unrar Tainted: P (2.6.32-5-686 #1) To Be Filled By O.E.M.
[...]
> [<c10ce286>] ? __block_prepare_write+0x163/0x297
> [<c10ce50d>] ? block_write_begin+0x70/0xc6
> [<f805fe2b>] ? ext3_get_block+0x0/0xd1 [ext3]
> [<f80610f3>] ? ext3_write_begin+0xe6/0x1d2 [ext3]
> [<f805fe2b>] ? ext3_get_block+0x0/0xd1 [ext3]
> [<c1087ab7>] ? generic_file_buffered_write+0xd0/0x21d
> [<c1088001>] ? __generic_file_aio_write+0x265/0x28d
> [<c102cdb6>] ? try_to_wake_up+0x25d/0x269
> [<c10beac7>] ? pollwake+0x5c/0x65
> [<c108807a>] ? generic_file_aio_write+0x51/0x93
> [<c10b2652>] ? do_sync_write+0xc0/0x107
> [<c10437ee>] ? autoremove_wake_function+0x0/0x2d
> [<c10b239e>] ? fsnotify_modify+0x5a/0x61
> [<c1101994>] ? security_file_permission+0xc/0xd
> [<c10b2592>] ? do_sync_write+0x0/0x107
> [<c10b2f7e>] ? vfs_write+0x7e/0xd6
> [<c10b306e>] ? sys_write+0x3c/0x63
> [<c10030fb>] ? sysenter_do_call+0x12/0x28
> Code: 75 08 89 d8 5b e9 cc ff ff ff 5b c3 57 89 c7 56 89 ce 53 89 d3 e8 5c df 19 00 89 da 89 f1 89 f8 e8 54 f1 ff ff 85 c0 89 c3 74 17 <3e> 80 20 fd e8 ba ff ff ff 3e 80 23 f7 89 d8 5b 5e 5f e9 ef f3

If this is reproducible, please provide full "dmesg" output from
booting and triggering the bug, without the nvidia driver loaded. (If
the bug is only reproducible in the presence of the nvidia driver,
that's fine too, and we can pass the report to that driver's authors.)

Thanks and hope that helps,
Jonathan



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tags 596297 = unreproducible
quit

Hi again,

Jonathan Nieder wrote:
> Stefan Arnold wrote:

>> As I told the kernel gave me a error message during unpacking an archive.
>> The unrar process did not die and i could not even kill it with -9.
>
> Oh, dear. Sorry for the slow response.
>
>> BUG: unable to handle kernel NULL pointer dereference at 00000800
>> IP: [<c10cd8e7>] unmap_underlying_metadata+0x1f/0x3a
>> *pde = 00000000
>> Oops: 0002 [#1] SMP
>
> Was this reproducible? Is it still?
>
> [...]
> > Pid: 5036, comm: unrar Tainted: P (2.6.32-5-686 #1) To Be Filled By O.E.M.
> [...]
>> [<c10ce286>] ? __block_prepare_write+0x163/0x297
>> [<c10ce50d>] ? block_write_begin+0x70/0xc6
>> [<f805fe2b>] ? ext3_get_block+0x0/0xd1 [ext3]
>> [<f80610f3>] ? ext3_write_begin+0xe6/0x1d2 [ext3]
[...]
>> Code: 75 08 89 d8 5b e9 cc ff ff ff 5b c3 57 89 c7 56 89 ce 53 89 d3 e8 5c df 19 00 89 da 89 f1 89 f8 e8 54 f1 ff ff 85 c0 89 c3 74 17 <3e> 80 20 fd e8 ba ff ff ff 3e 80 23 f7 89 d8 5b 5e 5f e9 ef f3

As a quick guess, this looks like the bug fixed by the patch [1] which
doesn't seem to have been applied. Maybe there was some other fix.
(Or maybe it is memory corruption. Haven't tried matching the
disassembly to the corresponding code.)

[1] http://thread.gmane.org/gmane.linux.file-systems/33136/focus=33141



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