[ 079/175] md/bitmap: ensure to load bitmap when creating via sysfs.

From: Greg KH
Date: Fri Mar 30 2012 - 17:20:49 EST

3.3-stable review patch. If anyone has any objections, please let me know.


From: NeilBrown <neilb@xxxxxxx>

commit 4474ca42e2577563a919fd3ed782e2ec55bf11a2 upstream.

When commit 69e51b449d383e (md/bitmap: separate out loading a bitmap...)
created bitmap_load, it missed calling it after bitmap_create when a
bitmap is created through the sysfs interface.
So if a bitmap is added this way, we don't allocate memory properly
and can crash.

This is suitable for any -stable release since 2.6.35.
Signed-off-by: NeilBrown <neilb@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

drivers/md/bitmap.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -1904,6 +1904,8 @@ location_store(struct mddev *mddev, cons
if (mddev->pers) {
mddev->pers->quiesce(mddev, 1);
rv = bitmap_create(mddev);
+ if (!rv)
+ rv = bitmap_load(mddev);
if (rv) {
mddev->bitmap_info.offset = 0;

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