This is a note to let you know that I've just added the patch titled
blkcg: fix double free of new_blkg in blkcg_init_queue
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:
blkcg-fix-double-free-of-new_blkg-in-blkcg_init_queue.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 9b54d816e00425c3a517514e0d677bb3cec49258 Mon Sep 17 00:00:00 2001
From: Hou Tao <houtao1@xxxxxxxxxx>
Date: Fri, 3 Feb 2017 17:19:07 +0800
Subject: blkcg: fix double free of new_blkg in blkcg_init_queue
From: Hou Tao <houtao1@xxxxxxxxxx>
commit 9b54d816e00425c3a517514e0d677bb3cec49258 upstream.
If blkg_create fails, new_blkg passed as an argument will
be freed by blkg_create, so there is no need to free it again.
Signed-off-by: Hou Tao <houtao1@xxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
block/blk-cgroup.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1078,10 +1078,8 @@ int blkcg_init_queue(struct request_queu
if (preloaded)
radix_tree_preload_end();
- if (IS_ERR(blkg)) {
- blkg_free(new_blkg);
+ if (IS_ERR(blkg))
return PTR_ERR(blkg);
- }
q->root_blkg = blkg;
q->root_rl.blkg = blkg;
Patches currently in stable-queue which might be from houtao1@xxxxxxxxxx are
queue-4.9/blkcg-fix-double-free-of-new_blkg-in-blkcg_init_queue.patch