linux-kernel - Re: [PATCH v3] block: add check that partition length needs to be aligned with block size

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Message-ID: <6232885e-d841-8067-b238-dda6f89f33f2@kernel.org>
Date:   Wed, 28 Jun 2023 15:05:28 +0900
From:   Damien Le Moal <dlemoal@...nel.org>
To:     Min Li <min15.li@...sung.com>, axboe@...nel.dk,
        willy@...radead.org, hch@....de, gregkh@...uxfoundation.org
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...nel.org
Subject: Re: [PATCH v3] block: add check that partition length needs to be
 aligned with block size

On 6/28/23 22:09, 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@...sung.com>

Reviewed-by: Damien Le Moal <dlemoal@...nel.org>


-- 
Damien Le Moal
Western Digital Research