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SubjectRe: Kernel 3.3.8 breaks accidental ext3 mount of extended partition
Date
Torsten Hilbrich <torsten.hilbrich@secunet.com> writes:

> Am 25.06.2012 18:38, schrieb Jeff Moyer:
>> "Richard W.M. Jones" <rjones@redhat.com> writes:
>>
>>> On Mon, Jun 18, 2012 at 07:59:30AM +0200, Torsten Hilbrich wrote:
>>>> Hello,
>>>>
>>>> a software that tries to mount each existing partition as ext3 file system started to fail when updating from v3.3.7 to v3.3.8.
>>>>
>>>> The applications then hangs-up in the mount syscall, here is a snapshot of its stack at this moment:
>>>
>>> We just ran into what we think is the same problem.
>>>
>>> Note that ext4 fails like this for any 1024 byte sized filesystem (of
>>> zeroes) that you try to mount. It's really nothing to do with
>>> extended partitions.
>>>
>>> Here is a very simple reproducer + stack trace:
>>>
>>> https://bugzilla.redhat.com/show_bug.cgi?id=835019#c4
>>>
>>> I will try out the patch suggested later on in this thread.
>>
>> Please try the attached patch instead. The patch I had originally
>> posted for this allowed marking the first buffer beyond EOD as
>> uptodate. This isn't correct. The patch I've attached below fixes the
>> infinite loop in __getblk_slow.
>
> This patch also fixes the ext3 mount problem on extented partition.

Great news, thanks for testing, guys! I'll follow up with another patch
posting this morning.

Cheers,
Jeff


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