linux-kernel - Re: [PATCH] mtd: rawnand: fsl_upm: Fix an off-by one test in fun_exec

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <6f3c9139-cf68-4761-af06-462a72bda978@kadam.mountain>
Date:   Thu, 20 Jul 2023 10:04:12 +0300
From:   Dan Carpenter <dan.carpenter@...aro.org>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-mtd@...ts.infradead.org
Subject: Re: [PATCH] mtd: rawnand: fsl_upm: Fix an off-by one test in
 fun_exec_op()

On Wed, Jul 19, 2023 at 11:55:01PM +0200, Christophe JAILLET wrote:
> 'op-cs' is copied in 'fun->mchip_number' which is used to access the
> 'mchip_offsets' and the 'rnb_gpio' arrays.
> These arrays have NAND_MAX_CHIPS elements, so the index must be below this
> limit.
> 
> Fix the sanity check in order to avoid the NAND_MAX_CHIPS value. This
> would lead to out-of-bound accesses.
> 
> Fixes: 54309d657767 ("mtd: rawnand: fsl_upm: Implement exec_op()")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> ---

Reviewed-by: Dan Carpenter <dan.carpenter@...aro.org>

Good eye.  I'm assuming you did something like this:

#!/bin/bash

FILE=$1
WORDS=$(cat $FILE | perl -ne 'if ($_ =~ /\[([\w_]+)\];/) { print "$1\n" }' | sort -u)
for i in $WORDS ; do
    grep -Hn " > $i" $FILE
done

regards,
dan carpenter