Mailinglist Archive: opensuse-bugs (9716 mails)

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https://bugzilla.novell.com/show_bug.cgi?id=336669#c32





--- Comment #32 from Jeff Mahoney <jeffm@xxxxxxxxxx>  2007-11-02 10:47:26 MST 
---
Created an attachment (id=181839)
 --> (https://bugzilla.novell.com/attachment.cgi?id=181839)
[PATCH] reiserfs: bad unlock in reiserfs_xattr_get

WARNING: at kernel/mutex-debug.c:82 debug_mutex_unlock()

Call Trace:
 [<ffffffff80249c32>] debug_mutex_unlock+0x5e/0x132
 [<ffffffff8041592d>] __mutex_unlock_slowpath+0xba/0xfd
 [<ffffffff880ba3d1>] :reiserfs:reiserfs_xattr_get+0x234/0x24f
 [<ffffffff80294cc5>] do_lookup+0x63/0x1ae
 [<ffffffff880ba01b>] :reiserfs:reiserfs_getxattr+0x7b/0xa2
 [<ffffffff802a799d>] vfs_getxattr+0x96/0xf5
 [<ffffffff802a7aa2>] getxattr+0xa6/0x105
 [<ffffffff80287362>] poison_obj+0x26/0x2f
 [<ffffffff8028767f>] cache_free_debugcheck+0x18d/0x19c
 [<ffffffff802a7b4c>] sys_lgetxattr+0x4b/0x69
 [<ffffffff80209d51>] tracesys+0x71/0xe1
 [<ffffffff80209dbc>] tracesys+0xdc/0xe1


This is what I was looking for. I've found a bug where if getxattr() is called
with either a NULL buffer (common) or a too small buffer (not common), it
incorrectly unlocks the mutex, despite it not having been locked.

I've checked in a patch to the CVS tree.


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