Bug 13122

A bisection result: http://marc.info/?l=linux-kernel&m=124188253923643

Proposed patches: http://lkml.org/lkml/2009/5/10/91

Caused-by:

commit d984561b326cd0fe0d1183d11b9b4fa1d011d21d
Author: Jeff Mahoney <jeffm@suse.com>
Date:   Mon Mar 30 14:02:35 2009 -0400

    reiserfs: eliminate per-super xattr lock

    With the switch to using inode->i_mutex locking during lookups/creation
    in the xattr root, the per-super xattr lock is no longer needed.

    This patch removes it.

    Signed-off-by: Jeff Mahoney <jeffm@suse.com>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

First-Bad-Commit : d984561b326cd0fe0d1183d11b9b4fa1d011d21d

Handled-By : Jeff Mahoney <jeffm@suse.com>
Patch : http://lkml.org/lkml/2009/5/10/91

On Sunday 17 May 2009, Linus Torvalds wrote:
> 
> On Sat, 16 May 2009, Rafael J. Wysocki wrote:
> >
> > The following bug entry is on the current list of known regressions
> > from 2.6.29.  Please verify if it still should be listed and let me know
> > (either way).
> > 
> > 
> > Bug-Entry   : http://bugzilla.kernel.org/show_bug.cgi?id=13122
> > Subject             : reiserfs_delete_xattrs: Couldn't delete all xattrs
> (-13)
> > Submitter   : Alexander Beregalov <a.beregalov@gmail.com>
> > Date                : 2009-04-16 19:23 (31 days old)
> > First-Bad-Commit:
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d984561b326cd0fe0d1183d11b9b4fa1d011d21d
> > References  : http://marc.info/?l=linux-kernel&m=123990989515105&w=4
> > Handled-By  : Jeff Mahoney <jeffm@suse.com>
> > Patch               : http://lkml.org/lkml/2009/5/10/91
> 
> The fix should now be merged as b83674c0da6558e357c6b482ccf299eeea77d8ef 
> ("reiserfs: fixup perms when xattrs are disabled")

Hmm, I encountered the problem in 2.6.30_rc5 (didn't check the previous RCs) and updated today to rc6 only to find that the kernel segfaults now (in a reiserfs call).

Going back to rc5 removes the segfaults, but the warnings come back.

I fixed this for rc6 by enabling xattr support for reiserfs in the kernel config (I had it disabled).

I'm going to try to log the segfault somehow. I didn't seem to be written to the system log when it occured.

I don't know how this is handled on kernel.org. Should I open a new bug for this problem or does someone have to reopen this one here?

Greets,
Tobias

The patches that are supposed to fix the issue have gone in after 2.6.30-rc6.  So, the bug should be fixed in -rc7 and if it's not, please reopen this entry.

Tobias, you are most likely seeing bug 13321.  You can either try current git, or -rc6 plus extra patches (linked in bug 13321) or wait for -rc7.

PS:  If you get something different from bug 13321 (see attachment 21374 [details] there) with latest git, then please open a new bug.

Thanks Stefan for the info! I'm pretty sure it's bug #13321. I just removed xattr support for reiserfs from kernel config again and it also crashes in reiserfs_for_each_xattr on boot. Going to wait for rc7 though :)