linux-kernel - Re: [PATCH 4/4] video: Remove stack VLA usage

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: <1520575267.11634.25.camel@perches.com>
Date:   Thu, 08 Mar 2018 22:01:07 -0800
From:   Joe Perches <joe@...ches.com>
To:     "Tobin C. Harding" <me@...in.cc>,
        Florian Tobias Schandinat <FlorianSchandinat@....de>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:     kernel-hardening@...ts.openwall.com, linux-kernel@...r.kernel.org,
        driverdev-devel@...uxdriverproject.org,
        Tycho Andersen <tycho@...ho.ws>,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH 4/4] video: Remove stack VLA usage

On Fri, 2018-03-09 at 16:50 +1100, Tobin C. Harding wrote:
> The kernel would like to have all stack VLA usage removed[1].  The
> arrays are fixed here (declared with a const variable) but they appear
> like VLAs to the compiler.  We can use a pre-processor define to fix the
> warning.  
[]
> diff --git a/drivers/video/fbdev/via/via_aux_sii164.c b/drivers/video/fbdev/via/via_aux_sii164.c
[]
> @@ -27,6 +27,9 @@
>  
>  static const char *name = "SiI 164 PanelLink Transmitter";
>  
> +/* check vendor id and device id */
> +const u8 id[] = {0x01, 0x00, 0x06, 0x00};

It seems id is now global in multiple places.
Perhaps these should be static.

> diff --git a/drivers/video/fbdev/via/via_aux_vt1631.c b/drivers/video/fbdev/via/via_aux_vt1631.c
[]
> @@ -27,16 +27,19 @@
>  
>  static const char *name = "VT1631 LVDS Transmitter";
>  
> +/* check vendor id and device id */
> +const u8 id[] = {0x06, 0x11, 0x91, 0x31}, len = ARRAY_SIZE(id);

etc...