From 6990597d9d2f45a969d16d068369f93db0a7d281 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Mon, 19 Mar 2012 12:46:37 +1100 Subject: [PATCH] md/bitmap: ensure to load bitmap when creating via sysfs. 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 Signed-off-by: Greg Kroah-Hartman --- drivers/md/bitmap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 574b09afedd3..703a3fa831bc 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -1982,6 +1982,8 @@ location_store(mddev_t *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; -- 2.39.5