This is a note to let you know that I've just added the patch titled
bcache: Fix leak of bdev reference
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:
bcache-fix-leak-of-bdev-reference.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@xxxxxxxxxxxxxxx> know about it.
>From 4b758df21ee7081ab41448d21d60367efaa625b3 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@xxxxxxx>
Date: Wed, 6 Sep 2017 14:25:51 +0800
Subject: bcache: Fix leak of bdev reference
From: Jan Kara <jack@xxxxxxx>
commit 4b758df21ee7081ab41448d21d60367efaa625b3 upstream.
If blkdev_get_by_path() in register_bcache() fails, we try to lookup the
block device using lookup_bdev() to detect which situation we are in to
properly report error. However we never drop the reference returned to
us from lookup_bdev(). Fix that.
Signed-off-by: Jan Kara <jack@xxxxxxx>
Acked-by: Coly Li <colyli@xxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/bcache/super.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1968,6 +1968,8 @@ static ssize_t register_bcache(struct ko
else
err = "device busy";
mutex_unlock(&bch_register_lock);
+ if (!IS_ERR(bdev))
+ bdput(bdev);
if (attr == &ksysfs_register_quiet)
goto out;
}
Patches currently in stable-queue which might be from jack@xxxxxxx are
queue-4.9/ext4-fix-quota-inconsistency-during-orphan-cleanup-for-read-only-mounts.patch
queue-4.9/bcache-fix-leak-of-bdev-reference.patch
queue-4.9/orangefs-don-t-clear-sgid-when-inheriting-acls.patch
queue-4.9/ext4-fix-incorrect-quotaoff-if-the-quota-feature-is-enabled.patch