From: Sagi Grimberg Date: Mon, 27 Feb 2017 16:44:45 +0000 (+0200) Subject: nvme-loop: fix a possible use-after-free when destroying the admin queue X-Git-Tag: archive/raspbian/4.9.80-2+rpi1~7^2~661 X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=af0cee086b0920612de5d6ad2a8f406792b5aa9d;p=linux-4.9.git nvme-loop: fix a possible use-after-free when destroying the admin queue [ Upstream commit e4c5d3762e2d6d274bd1cc948c47063becfa2103 ] we need to destroy the nvmet sq and let it finish gracefully before continue to cleanup the queue. Reviewed-by: Christoph Hellwig Signed-off-by: Sagi Grimberg Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c index d5df77d686b2..c8e612c1c72f 100644 --- a/drivers/nvme/target/loop.c +++ b/drivers/nvme/target/loop.c @@ -288,9 +288,9 @@ static struct blk_mq_ops nvme_loop_admin_mq_ops = { static void nvme_loop_destroy_admin_queue(struct nvme_loop_ctrl *ctrl) { + nvmet_sq_destroy(&ctrl->queues[0].nvme_sq); blk_cleanup_queue(ctrl->ctrl.admin_q); blk_mq_free_tag_set(&ctrl->admin_tag_set); - nvmet_sq_destroy(&ctrl->queues[0].nvme_sq); } static void nvme_loop_free_ctrl(struct nvme_ctrl *nctrl)