[dm-devel] dm: check the sector size of underlying device when verifying start

Mike Snitzer snitzer at redhat.com
Fri Aug 10 15:56:51 UTC 2018

On Fri, Aug 10 2018 at 11:23am -0400,
Mikulas Patocka <mpatocka at redhat.com> wrote:

> It was found out that these commands would fail:
> # modprobe scsi_debug dev_size_mb=128 sector_size=512
> # dmsetup create crypt0 --table "0 245752 crypt cipher_null-ecb - 0 /dev/sda 16385 1 sector_size:4096"
> with the error
> "device-mapper: table: 253:0: start=16385 not aligned to h/w logical block size 4096 of sda"
> The logic incorrectly checks the starting sector offset on the underlying
> device against the block size of the device that is being created.
> This patch fixes it by checking the starting sector offset against the
> block size of the underlying device, not the device that is being created.
> Signed-off-by: Mikulas Patocka <mpatocka at redhat.com>
> Cc: stable at vger.kernel.org

tweaked like we discussed and staged for 4.19 here:

More information about the dm-devel mailing list