This is a note to let you know that I've just added the patch titled
blkcg: fix gendisk reference leak in blkg_conf_prep()
to the 3.10-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:
blkcg-fix-gendisk-reference-leak-in-blkg_conf_prep.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5f6c2d2b7dbb541c1e922538c49fa04c494ae3d7 Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@xxxxxxxxxx>
Date: Wed, 22 Jul 2015 18:05:53 -0400
Subject: blkcg: fix gendisk reference leak in blkg_conf_prep()
From: Tejun Heo <tj@xxxxxxxxxx>
commit 5f6c2d2b7dbb541c1e922538c49fa04c494ae3d7 upstream.
When a blkcg configuration is targeted to a partition rather than a
whole device, blkg_conf_prep fails with -EINVAL; unfortunately, it
forgets to put the gendisk ref in that case. Fix it.
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
block/blk-cgroup.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -720,8 +720,12 @@ int blkg_conf_prep(struct blkcg *blkcg,
return -EINVAL;
disk = get_gendisk(MKDEV(major, minor), &part);
- if (!disk || part)
+ if (!disk)
return -EINVAL;
+ if (part) {
+ put_disk(disk);
+ return -EINVAL;
+ }
rcu_read_lock();
spin_lock_irq(disk->queue->queue_lock);
Patches currently in stable-queue which might be from tj@xxxxxxxxxx are
queue-3.10/blkcg-fix-gendisk-reference-leak-in-blkg_conf_prep.patch
queue-3.10/ata-pmp-add-quirk-for-marvell-4140-sata-pmp.patch
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