linux-kernel - Re: [PATCH] target: sbp: integer overflow and potential memory corruption

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Date: Mon, 05 Feb 2024 17:02:12 -0500
From: "Martin K. Petersen" <martin.petersen@...cle.com>
To: Fullway Wang <fullwaywang@...look.com>
Cc: bootc@...tc.net, martin.petersen@...cle.com, linux-scsi@...r.kernel.org,
        target-devel@...r.kernel.org, linux-kernel@...r.kernel.org,
        fullwaywang@...cent.com
Subject: Re: [PATCH] target: sbp: integer overflow and potential memory
 corruption


Fullway,

> The code in sbp_make_tpg() is confusing because tpgt was limited
> to UINT_MAX but the datatype of tpg->tport_tpgt is actually u16.
> Correctly fix the data type problem to avoid integer overflow.
>
> This is similar to CVE-2015-4036 in the sense that sbp is a clone
> of vhost/scsi, and the bug was inherited but never fixed.

> +#define SBP_MAX_TARGET	256

Why 256?

-- 
Martin K. Petersen	Oracle Linux Engineering