linux-kernel - Re: [PATCH][next] net: dsa: fix dereference on ds->dev before null check error

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] [day] [month] [year] [list]

Message-ID: <20191024124716.GB1210163@t480s.localdomain>
Date:   Thu, 24 Oct 2019 12:47:16 -0400
From:   Vivien Didelot <vivien.didelot@...il.com>
To:     Colin King <colin.king@...onical.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        netdev@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] net: dsa: fix dereference on ds->dev before null
 check error

On Thu, 24 Oct 2019 11:32:18 +0100, Colin King <colin.king@...onical.com> wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> Currently ds->dev is dereferenced on the assignments of pdata and
> np before ds->dev is null checked, hence there is a potential null
> pointer dereference on ds->dev.  Fix this by assigning pdata and
> np after the ds->dev null pointer sanity check.
> 
> Addresses-Coverity: ("Dereference before null check")
> Fixes: 7e99e3470172 ("net: dsa: remove dsa_switch_alloc helper")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Reviewed-by: Vivien Didelot <vivien.didelot@...il.com>