ublk: Validate SQE128 flag before accessing the cmd

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[ Upstream commit da7e4b75e5 ]

ublk_ctrl_cmd_dump() accesses (header *)sqe->cmd before
IO_URING_F_SQE128 flag check. This could cause out of boundary memory
access.

Move the SQE128 flag check earlier in ublk_ctrl_uring_cmd() to return
-EINVAL immediately if the flag is not set.

Fixes: 71f28f3136 ("ublk_drv: add io_uring based userspace block driver")
Signed-off-by: Govindarajulu Varadarajan <govind.varadar@gmail.com>
Reviewed-by: Caleb Sander Mateos <csander@purestorage.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Govindarajulu Varadarajan 2026-01-30 10:14:12 -07:00 • committed by Sasha Levin

parent 8af710156c

commit dbe8e81a2e

1 changed files with 3 additions and 3 deletions

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drivers/block/ublk_drv.c

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