Re: [PATCH v2] block: add check that partition length needs to be aligned with block size

[Chaitanya Kulkarni]

On 6/27/2023 4:09 AM, Min Li wrote:
> Before calling add partition or resize partition, there is no check
> on whether the length is aligned with the logical block size.
> If the logical block size of the disk is larger than 512 bytes,
> then the partition size maybe not the multiple of the logical block size,
> and when the last sector is read, bio_truncate() will adjust the bio size,
> resulting in an IO error if the size of the read command is smaller than
> the logical block size.If integrity data is supported, this will also
> result in a null pointer dereference when calling bio_integrity_free.
> 
> Signed-off-by: Min Li <min15.li@xxxxxxxxxxx>
> 
> ---
> Changes from v1:
> 
> - Add a space after /* and before */.
> - Move length alignment check before the "start = p.start >> SECTOR_SHIFT"
> - Move check for p.start being aligned together with this length alignment check.
> ---

Reviewed-by: Chaitanya Kulkarni <kch@xxxxxxxxxx>

-ck