https://bugzilla.kernel.org/show_bug.cgi?id=30872


Eric Sandeen [off-list ref] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sandeen@redhat.com

--- Comment #2 from Eric Sandeen <sandeen@redhat.com>  2011-03-14 14:23:29 ---

(In reply to comment #1)

...

quoted

If ext4_mb_add_groupinfo() fails for some reason (e.g. if memory allocation at
line 2296 fails), ext4_mb_init_backend() tries to call kfree() for each
element in sbi->s_group_info array, including the ones that have not been
initialized yet:

fs/ext4/mballoc.c:2414:
err_freebuddy:
   cachep = get_groupinfo_cache(sb->s_blocksize_bits);
   while (i-- > 0)
       kmem_cache_free(cachep, ext4_get_group_info(sb, i));
   i = num_meta_group_infos;
   while (i-- > 0)

literally understand, should be
while (--i >= 0)

Could you try with above?

Hm, that probably is the most direct fix.

I sent a patch here:
http://marc.info/?l=linux-ext4&m=129979820301087&w=2
which initializes all the pointers to NULL and only frees if they are non-NULL, 
which may be more foolproof, but might also be overkill.

-Eric

-- 
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html