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| author | Xiaotian Feng <xtfeng@gmail.com> | 2012-12-04 19:33:54 +0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2012-12-04 07:29:47 -0800 |
| commit | c1d390d8e6128b050f0f66b1c33d390760deb3f4 (patch) | |
| tree | edbdf78f783da84eeacb7041a8b64d3096ce1f81 /kernel/workqueue.c | |
| parent | 8852aac25e79e38cc6529f20298eed154f60b574 (diff) | |
| download | lwn-c1d390d8e6128b050f0f66b1c33d390760deb3f4.tar.gz lwn-c1d390d8e6128b050f0f66b1c33d390760deb3f4.zip | |
megaraid: fix BUG_ON() from incorrect use of delayed work
megaraid use INIT_WORK to declare a hotplug_work, but cast the
hotplug_work from work_struct to delayed_work and
schedule_delayed_work on it. This is very dangerous, as other part of
delayed_work might be kernel memories allocated by others.
With commit 8852aac ("workqueue: mod_delayed_work_on() shouldn't queue
timer on 0 delay"), schedule_delayed_work() will check dwork->timer
before queue_work even when @delay is 0, this causes megaraid code to
hit the BUG_ON() in workqueue code. Change megaraid code to use
delayed work.
Signed-off-by: Xiaotian Feng <dannyfeng@tencent.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Neela Syam Kolli <megaraidlinux@lsi.com>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: linux-scsi@vger.kernel.org
Diffstat (limited to 'kernel/workqueue.c')
0 files changed, 0 insertions, 0 deletions