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scsi: sd: sd_zbc: Verify that the zone size is a power of two

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The following check in sd_zbc_cmnd_checks() can only work correctly if the
zone size is a power of two:

	if (sector & (sd_zbc_zone_sectors(sdkp) - 1))
		/* Unaligned request */
		return BLK_STS_IOERR;

Hence this patch that verifies that the zone size is a power of two.

Link: https://lore.kernel.org/r/20220421183023.3462291-3-bvanassche@acm.org
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bart Van Assche 2022-04-21 11:30:16 -07:00 • committed by Martin K. Petersen
parent aa96bfb4ca
commit 9a93b9c9d3
1 changed files with 7 additions and 0 deletions
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7
drivers/scsi/sd_zbc.c
View file

@ -664,6 +664,13 @@ static int sd_zbc_check_capacity(struct scsi_disk *sdkp, unsigned char *buf,
return -EFBIG;
}
if (!is_power_of_2(zone_blocks)) {
sd_printk(KERN_ERR, sdkp,
"Zone size %llu is not a power of two.\n",
zone_blocks);
return -EINVAL;
}
*zblocks = zone_blocks;
return 0;