ublk: fail to start device if queue setup is interrupted

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[ Upstream commit 53e7d08f6d ]

In ublk_ctrl_start_dev(), if wait_for_completion_interruptible() is
interrupted by signal, queues aren't setup successfully yet, so we
have to fail UBLK_CMD_START_DEV, otherwise kernel oops can be triggered.

Reported by German when working on qemu-storage-deamon which requires
single thread ublk daemon.

Fixes: 71f28f3136 ("ublk_drv: add io_uring based userspace block driver")
Reported-by: German Maglione <gmaglione@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230726144502.566785-2-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 22:45:00 +08:00 • committed by Greg Kroah-Hartman

parent e2e4bc585e

commit 6ab3e7d424

1 changed files with 2 additions and 1 deletions

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drivers/block/ublk_drv.c

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