md/linear: If md_integrity_register() fails, linear_run() must free the mem.

Signed-off-by: majianpeng <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index b0fcc7d02adb..fa211d80fc0a 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -198,6 +198,7 @@ out:
 static int linear_run (struct mddev *mddev)
 {
         struct linear_conf *conf;
+        int ret;
 
         if (md_check_no_bitmap(mddev))
                 return -EINVAL;
@@ -211,7 +212,13 @@ static int linear_run (struct mddev *mddev)
         blk_queue_merge_bvec(mddev->queue, linear_mergeable_bvec);
         mddev->queue->backing_dev_info.congested_fn = linear_congested;
         mddev->queue->backing_dev_info.congested_data = mddev;
-        return md_integrity_register(mddev);
+
+        ret =  md_integrity_register(mddev);
+        if (ret) {
+                kfree(conf);
+                mddev->private = NULL;
+        }
+        return ret;
 }
 
 static int linear_add(struct mddev *mddev, struct md_rdev *rdev)