On 09/08/2021 11:50, Niklas Cassel wrote:

From: Niklas Cassel <redacted>

Zone management send operations (BLKRESETZONE, BLKOPENZONE, BLKCLOSEZONE
and BLKFINISHZONE) should be allowed under the same permissions as write().
(write() does not require CAP_SYS_ADMIN).

Additionally, other ioctls like BLKSECDISCARD and BLKZEROOUT only check if
the fd was successfully opened with FMODE_WRITE.
(They do not require CAP_SYS_ADMIN).

Currently, zone management send operations require both CAP_SYS_ADMIN
and that the fd was successfully opened with FMODE_WRITE.

Remove the CAP_SYS_ADMIN requirement, so that zone management send
operations match the access control requirement of write(), BLKSECDISCARD
and BLKZEROOUT.

Fixes: 3ed05a987e0f ("blk-zoned: implement ioctls")
Signed-off-by: Niklas Cassel <redacted>
Reviewed-by: Damien Le Moal <redacted>
Reviewed-by: Aravind Ramesh <redacted>
Reviewed-by: Adam Manzanares <redacted>
Reviewed-by: Himanshu Madhani <redacted>
Cc: stable@vger.kernel.org # v4.10+
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Looks good,
Reviewed-by: Johannes Thumshirn <redacted>