linux-kernel - Re: [PATCH] scsi: sr: fix oob access in get

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Date:   Wed, 15 Mar 2017 20:07:53 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Kefeng Wang <wangkefeng.wang@...wei.com>
Cc:     Jens Axboe <axboe@...nel.dk>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] scsi: sr: fix oob access in get_capabilities

Kefeng Wang <wangkefeng.wang@...wei.com> writes:

Kefeng,

> 'n = header_length + block_descriptor_length' could be greater than 512,
> and will lead to oob access, so enlarge transfer buffer to fix it.

Can you share the output of sg_modes -p 0x2a /dev/srN for the offending
drive?

This mode page is usually much smaller than 512 bytes (typically between
32 and 128 bytes).

-- 
Martin K. Petersen	Oracle Linux Engineering