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

block: kyber: fix domain token leak during requeue

to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: block-kyber-fix-domain-token-leak-during-requeue.patch and it can be found in the queue-4.15 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 ba989a01469d027861e55c8f1121edadef757797 Mon Sep 17 00:00:00 2001

From: Ming Lei ming.lei@redhat.com Date: Fri, 23 Feb 2018 23:36:57 +0800 Subject: block: kyber: fix domain token leak during requeue

From: Ming Lei ming.lei@redhat.com

commit ba989a01469d027861e55c8f1121edadef757797 upstream.

When requeuing request, the domain token should have been freed before re-inserting the request to io scheduler. Otherwise, the assigned domain token will be leaked, and IO hang can be caused.

Cc: Paolo Valente paolo.valente@linaro.org Cc: Omar Sandoval osandov@fb.com Cc: stable@vger.kernel.org Reviewed-by: Bart Van Assche bart.vanassche@wdc.com Signed-off-by: Ming Lei ming.lei@redhat.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- block/kyber-iosched.c | 1 + 1 file changed, 1 insertion(+)

--- a/block/kyber-iosched.c +++ b/block/kyber-iosched.c @@ -833,6 +833,7 @@ static struct elevator_type kyber_sched .limit_depth = kyber_limit_depth, .prepare_request = kyber_prepare_request, .finish_request = kyber_finish_request, + .requeue_request = kyber_finish_request, .completed_request = kyber_completed_request, .dispatch_request = kyber_dispatch_request, .has_work = kyber_has_work,

Patches currently in stable-queue which might be from ming.lei@redhat.com are

queue-4.15/block-pass-inclusive-lend-parameter-to-truncate_inode_pages_range.patch queue-4.15/block-kyber-fix-domain-token-leak-during-requeue.patch