linux-kernel - [PATCH 001 of 9] md: Fix use after free when removing rdev via sysfs

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Message-Id:  <1080429033447.20313@suse.de>
Date:	Tue, 29 Apr 2008 13:34:47 +1000
From:	NeilBrown <neilb@...e.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	stable@...nel.org
Subject: [PATCH 001 of 9] md: Fix use after free when removing rdev via sysfs


From: Dan Williams <dan.j.williams@...el.com>

rdev->mddev is no longer valid upon return from entry->store() when the
'remove' command is given.

This should go in 2.6.25.stable.

Cc: stable@...nel.org
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: Neil Brown <neilb@...e.de>

### Diffstat output
 ./drivers/md/md.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff .prev/drivers/md/md.c ./drivers/md/md.c
--- .prev/drivers/md/md.c	2008-04-29 12:27:50.000000000 +1000
+++ ./drivers/md/md.c	2008-04-29 12:27:55.000000000 +1000
@@ -2096,7 +2096,7 @@ rdev_attr_store(struct kobject *kobj, st
 			rv = -EBUSY;
 		else
 			rv = entry->store(rdev, page, length);
-		mddev_unlock(rdev->mddev);
+		mddev_unlock(mddev);
 	}
 	return rv;
 }
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