From: Aravind Ramesh <Aravind.Ramesh@wdc.com>
To: Niklas Cassel <Niklas.Cassel@wdc.com>,
Jens Axboe <axboe@kernel.dk>,
Damien Le Moal <Damien.LeMoal@wdc.com>,
Shaun Tancheff <shaun@tancheff.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Hannes Reinecke <hare@suse.com>
Cc: Damien Le Moal <Damien.LeMoal@wdc.com>,
Niklas Cassel <Niklas.Cassel@wdc.com>,
"stable@vger.kernel.org" <stable@vger.kernel.org>,
Jens Axboe <axboe@fb.com>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH v3 1/2] blk-zoned: allow zone management send operations without CAP_SYS_ADMIN
Date: Wed, 16 Jun 2021 13:42:47 +0000 [thread overview]
Message-ID: <BYAPR04MB4056CD5501CAB658B2B274358C0F9@BYAPR04MB4056.namprd04.prod.outlook.com> (raw)
In-Reply-To: <20210614122303.154378-2-Niklas.Cassel@wdc.com>
> -----Original Message-----
> From: Niklas Cassel <Niklas.Cassel@wdc.com>
> Sent: Monday, June 14, 2021 5:53 PM
> To: Jens Axboe <axboe@kernel.dk>; Damien Le Moal <Damien.LeMoal@wdc.com>;
> Shaun Tancheff <shaun@tancheff.com>; Martin K. Petersen
> <martin.petersen@oracle.com>; Hannes Reinecke <hare@suse.com>
> Cc: Damien Le Moal <Damien.LeMoal@wdc.com>; Niklas Cassel
> <Niklas.Cassel@wdc.com>; stable@vger.kernel.org; Jens Axboe <axboe@fb.com>;
> linux-block@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: [PATCH v3 1/2] blk-zoned: allow zone management send operations
> without CAP_SYS_ADMIN
>
> From: Niklas Cassel <niklas.cassel@wdc.com>
>
> 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 <niklas.cassel@wdc.com>
> Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
> Cc: stable@vger.kernel.org # v4.10+
> ---
> Changes since v2:
> -None
>
> Note to backporter:
> Function was added as blkdev_reset_zones_ioctl() in v4.10.
> Function was renamed to blkdev_zone_mgmt_ioctl() in v5.5.
> The patch is valid both before and after the function rename.
>
> block/blk-zoned.c | 3 ---
> 1 file changed, 3 deletions(-)
>
> diff --git a/block/blk-zoned.c b/block/blk-zoned.c index
> 250cb76ee615..0789e6e9f7db 100644
> --- a/block/blk-zoned.c
> +++ b/block/blk-zoned.c
> @@ -349,9 +349,6 @@ int blkdev_zone_mgmt_ioctl(struct block_device *bdev,
> fmode_t mode,
> if (!blk_queue_is_zoned(q))
> return -ENOTTY;
>
> - if (!capable(CAP_SYS_ADMIN))
> - return -EACCES;
> -
> if (!(mode & FMODE_WRITE))
> return -EBADF;
>
> --
> 2.31.1
Looks good,
Reviewed-by: Aravind Ramesh <aravind.ramesh@wdc.com>
next prev parent reply other threads:[~2021-06-16 13:42 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-14 12:23 [PATCH v3 0/2] allow blk-zoned ioctls without CAP_SYS_ADMIN Niklas Cassel
2021-06-14 12:23 ` [PATCH v3 1/2] blk-zoned: allow zone management send operations " Niklas Cassel
2021-06-16 13:42 ` Aravind Ramesh [this message]
2021-06-18 14:48 ` Adam Manzanares
2021-06-18 17:56 ` Himanshu Madhani
2021-06-14 12:23 ` [PATCH v3 2/2] blk-zoned: allow BLKREPORTZONE " Niklas Cassel
2021-06-16 2:29 ` Damien Le Moal
2021-06-16 13:43 ` Aravind Ramesh
2021-06-18 14:49 ` Adam Manzanares
2021-06-18 17:57 ` Himanshu Madhani
2021-06-28 7:20 ` [PATCH v3 0/2] allow blk-zoned ioctls " Niklas Cassel
2021-07-05 11:26 ` Niklas Cassel
2021-07-21 5:04 ` Aravind Ramesh
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