Patch "md.c:didn't unlock the mddev before return EINVAL in array_size_store" has been added to the 4.9-stable tree

Patch "md.c:didn't unlock the mddev before return EINVAL in array_size_store" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    md.c:didn't unlock the mddev before return EINVAL in array_size_store

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     md.c-didn-t-unlock-the-mddev-before-return-einval-in-array_size_store.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Sun Mar 18 16:55:33 CET 2018
From: Zhilong Liu <zlliu@suse.com>
Date: Mon, 10 Apr 2017 14:15:55 +0800
Subject: md.c:didn't unlock the mddev before return EINVAL in array_size_store

From: Zhilong Liu <zlliu@suse.com>


[ Upstream commit b670883bb9e55ba63a278d83e034faefc01ce2cf ]

md.c: it needs to release the mddev lock before
the array_size_store() returns.

Fixes: ab5a98b132fd ("md-cluster: change array_sectors and update size are not supported")

Signed-off-by: Zhilong Liu <zlliu@suse.com>
Reviewed-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/md/md.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4826,8 +4826,10 @@ array_size_store(struct mddev *mddev, co
 		return err;
 
 	/* cluster raid doesn't support change array_sectors */
-	if (mddev_is_clustered(mddev))
+	if (mddev_is_clustered(mddev)) {
+		mddev_unlock(mddev);
 		return -EINVAL;
+	}
 
 	if (strncmp(buf, "default", 7) == 0) {
 		if (mddev->pers)


Patches currently in stable-queue which might be from zlliu@suse.com are

queue-4.9/md.c-didn-t-unlock-the-mddev-before-return-einval-in-array_size_store.patch