Re: kernel bug in file-item.c

["Marc R. O'Connor" <mroconnor@oel.state.nj.us>]

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Chris Mason wrote:
> On Wed, 2009-04-29 at 14:21 -0400, Marc R. O'Connor wrote:
>> Chris Mason wrote:
>>> On Wed, 2009-04-29 at 12:04 -0400, Marc R. O'Connor wrote:
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>>>> Hash: SHA1
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>>>> full file-item.c attached
>>>>
>>>> Chris Mason wrote:
>>>>> On Tue, 2009-04-28 at 13:39 -0400, Marc R. O'Connor wrote:
>>>>>> I have had two 'kernel bug' issues today both referencing file-item.c.
>>>>>> The first oops happened when i was cp'ing from and external HD(ext3) to
>>>>>> and ext3 partition. The second happened during boot up. I have attached
>>>>>> them both.
>>>>>>
>>>>>> Im using btrfs that was merged into my kernel yesterday.
>>>>>>
>>>>>> plain text document attachment (btrfs_bug_1)
>>>>>> Apr 28 10:55:10 cosmo2 ------------[ cut here ]------------
>>>>>> Apr 28 10:55:10 cosmo2 kernel BUG at fs/btrfs/file-item.c:494!
>>>>> Well, I think I see the bug.  It looks like we want to do
>>>>>
>>>>> -        if (key->offset < bytenr && csum_end <= end_byte) {
>>>>> +        if (key->offset <= bytenr && csum_end <= end_byte) {
>>>>>
>>>>> in truncate_one_csum.  But I need to test that here for a bit and send
>>>>> you a patch.
>>> Ok, line 494 is actually this one ;)
>>>
>>>                 key->offset = end_byte;
>>>                 ret = btrfs_set_item_key_safe(trans, root, path, key);
>>>                 BUG_ON(ret); <---- 494
>>>
>>> Which means we're finding things out of order in the btree leaf.
>>>
>>> Could you please run btrfsck on this filesystem?
>>>
> 
>> I have done that on all btrfs partitions I have and btrfsck did not
>> return anything odd.
>>
> 
> In that case, the bad ordering is being introduced at run time.  Could
> you please run memtest86 on the box?
> 
> -chris
> 
> 
 memtest comes back with two errors very early on then reboots the
sysrescueCD. :(
-- 

--
Marc R. O'Connor
Information Systems
Camden County Board of Social Services
600 Market St.
Camden, NJ 08102
mroconnor@oel.state.nj.us
856-225-8915 Ofc.
609-206-3458 Blackberry
319D8AF1 BB PIN


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