[xfs-masters] [Bug 27002] kernel bug when mounting xfs partition

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=27002





--- Comment #4 from Dave Chinner <david at fromorbit.com>  2011-01-27 01:03:33 ---
(In reply to comment #3)
> Yes, you're right. It happens on unmounting operation.
> 
> Here's how i reproduce it. On vanilla 2.6.35.10
> 
> - compile it with the following config. 
>   http://pastebin.com/YuYAtSvw. Ignore the BFS. This is vanilla.
> - format a usb flash disk as xfs. mkfs -f /dev/flash_disk.
> - mount it as read-write (mount -w), then copy a text file. No problem.
>   OR
>   mount it as read-only (mount -r). No problem.
> - unmount it. Segmentation fault. here's the error :
> 
> XFS: unknown mount option [gid].
> XFS: unknown mount option [gid].
> XFS mounting filesystem sdc1
> Ending clean XFS mount for filesystem: sdc1
> ------------[ cut here ]------------
> kernel BUG at mm/vmalloc.c:936!

Can you post the code around this function and line in your source tree so we
can see exactly what bug condition is triggering. (please include line numbers)

FWIW, does the bug occur on more recent kernels?

Cheers,

Dave.

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