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ublk: fail to recover device if queue setup is interrupted

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[ Upstream commit 0c0cbd4ebc ]

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: c732a852b4 ("ublk_drv: add START_USER_RECOVERY and END_USER_RECOVERY support")
Reported-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20230726144502.566785-3-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ming Lei
2023-07-26 22:45:01 +08:00
committed by Greg Kroah-Hartman
parent 0d5916c439
commit 84415f934a
1 changed files with 3 additions and 1 deletions
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4
drivers/block/ublk_drv.c
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@@ -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);