Patch "ublk: fail to recover device if queue setup is interrupted" has been added to the 6.1-stable tree

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

    ublk: fail to recover device if queue setup is interrupted

to the 6.1-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:
     ublk-fail-to-recover-device-if-queue-setup-is-interr.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 553fe4bc245d5160dacb7745fccb66c5e4f74abb
Author: Ming Lei <ming.lei@xxxxxxxxxx>
Date:   Wed Jul 26 22:45:01 2023 +0800

    ublk: fail to recover device if queue setup is interrupted
    
    [ Upstream commit 0c0cbd4ebc375ceebc75c89df04b74f215fab23a ]
    
    In ublk_ctrl_end_recovery(), if wait_for_completion_interruptible() is
    interrupted by signal, queues aren't setup successfully yet, so we
    have to fail UBLK_CMD_END_USER_RECOVERY, otherwise kernel oops can be
    triggered.
    
    Fixes: c732a852b419 ("ublk_drv: add START_USER_RECOVERY and END_USER_RECOVERY support")
    Reported-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
    Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
    Reviewed-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20230726144502.566785-3-ming.lei@xxxxxxxxxx
    Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
index 495e1bf9003b6..4459cfbdbcb18 100644
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -1954,7 +1954,9 @@ static int ublk_ctrl_end_recovery(struct ublk_device *ub,
 	pr_devel("%s: Waiting for new ubq_daemons(nr: %d) are ready, dev id %d...\n",
 			__func__, ub->dev_info.nr_hw_queues, header->dev_id);
 	/* wait until new ubq_daemon sending all FETCH_REQ */
-	wait_for_completion_interruptible(&ub->completion);
+	if (wait_for_completion_interruptible(&ub->completion))
+		return -EINTR;
+
 	pr_devel("%s: All new ubq_daemons(nr: %d) are ready, dev id %d\n",
 			__func__, ub->dev_info.nr_hw_queues, header->dev_id);
 



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