linux-kernel - Re: out of range LBA using sg

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Message-ID: <1488989079.2813.1.camel@sandisk.com>
Date:   Wed, 8 Mar 2017 16:04:52 +0000
From:   Bart Van Assche <Bart.VanAssche@...disk.com>
To:     "hch@...radead.org" <hch@...radead.org>,
        "kashyap.desai@...adcom.com" <kashyap.desai@...adcom.com>
CC:     "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: out of range LBA using sg_raw

On Wed, 2017-03-08 at 21:29 +0530, Kashyap Desai wrote:
> Also one more fault I can generate using below sg_raw command -
> 
> "sg_raw -r 32k /dev/sdx 28 00 01 4f ff ff 00 00 08 00"
> 
> Provide more scsi data length compare to actual SG buffer. Do you suggest
> such SG_IO interface vulnerability is good to be captured in driver.

That's not a vulnerability of the SG I/O interface. A SCSI device has to set
the residual count correctly if the SCSI data length does not match the size
of the data buffer.

Bart.