]> git.baikalelectronics.ru Git - kernel.git/commit
ocfs2: fix BUG in ocfs2_downconvert_thread_do_work()
authorJoseph Qi <joseph.qi@huawei.com>
Thu, 6 Aug 2015 22:46:23 +0000 (15:46 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 7 Aug 2015 01:39:40 +0000 (04:39 +0300)
commit72c7868bb9e8f9e4e04abfc51ed299ad79cc54dd
tree0b12e03001248c15a79286d66caa295c33d2dbd7
parentf7aa633191ba5382c0619ed2c50eca6199c99fdf
ocfs2: fix BUG in ocfs2_downconvert_thread_do_work()

The "BUG_ON(list_empty(&osb->blocked_lock_list))" in
ocfs2_downconvert_thread_do_work can be triggered in the following case:

ocfs2dc has firstly saved osb->blocked_lock_count to local varibale
processed, and then processes the dentry lockres.  During the dentry
put, it calls iput and then deletes rw, inode and open lockres from
blocked list in ocfs2_mark_lockres_freeing.  And this causes the
variable `processed' to not reflect the number of blocked lockres to be
processed, which triggers the BUG.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/ocfs2/dlmglue.c