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md/bitmap: ensure to load bitmap when creating via sysfs. 

When commit 69e51b449d (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.
Cc: stable@vger.kernel.org
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2012-03-19 12:46:37 +11:00
parent c744a65c1e
commit 4474ca42e2
1 changed files with 2 additions and 0 deletions
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2
drivers/md/bitmap.c
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@ -1904,6 +1904,8 @@ location_store(struct mddev *mddev, const char *buf, size_t len)
if (mddev->pers) {
mddev->pers->quiesce(mddev, 1);
rv = bitmap_create(mddev);
if (!rv)
rv = bitmap_load(mddev);
if (rv) {
bitmap_destroy(mddev);
mddev->bitmap_info.offset = 0;