This is a note to let you know that I've just added the patch titled
MD: Add del_timer_sync to mddev_suspend (fix nasty panic)
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
md-add-del_timer_sync-to-mddev_suspend-fix-nasty-panic.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 0d9f4f135eb6dea06bdcb7065b1e4ff78274a5e9 Mon Sep 17 00:00:00 2001
From: Jonathan Brassow <[email protected]>
Date: Wed, 16 May 2012 04:06:14 -0500
Subject: MD: Add del_timer_sync to mddev_suspend (fix nasty panic)
From: Jonathan Brassow <[email protected]>
commit 0d9f4f135eb6dea06bdcb7065b1e4ff78274a5e9 upstream.
Use del_timer_sync to remove timer before mddev_suspend finishes.
We don't want a timer going off after an mddev_suspend is called. This is
especially true with device-mapper, since it can call the destructor function
immediately following a suspend. This results in the removal (kfree) of the
structures upon which the timer depends - resulting in a very ugly panic.
Therefore, we add a del_timer_sync to mddev_suspend to prevent this.
Signed-off-by: NeilBrown <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/md/md.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -348,6 +348,8 @@ void mddev_suspend(mddev_t *mddev)
synchronize_rcu();
wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0);
mddev->pers->quiesce(mddev, 1);
+
+ del_timer_sync(&mddev->safemode_timer);
}
EXPORT_SYMBOL_GPL(mddev_suspend);
Patches currently in stable-queue which might be from [email protected] are
queue-3.0/md-add-del_timer_sync-to-mddev_suspend-fix-nasty-panic.patch
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