linux-kernel - Re: Build regressions/improvements in v6.2-rc4

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: <20230116185033.GA2027409@roeck-us.net>
Date:   Mon, 16 Jan 2023 10:50:33 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: Build regressions/improvements in v6.2-rc4

On Mon, Jan 16, 2023 at 01:29:24PM +0100, Geert Uytterhoeven wrote:
> Below is the list of build error/warning regressions/improvements in
> v6.2-rc4[1] compared to v6.1[2].
> 
...
>   + /kisskb/src/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c: error: array subscript 2 is above array bounds of 'u32[2]' {aka 'unsigned int[2]'} [-Werror=array-bounds]:  => 641:28
>   + /kisskb/src/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c: error: array subscript 3 is above array bounds of 'u32[2]' {aka 'unsigned int[2]'} [-Werror=array-bounds]:  => 641:28

Unless I am missing something, the code is

        for (i = fmt->mem_planes; i < fmt->comp_planes; i++)
                size += q_data->sizeimage[i];

and both mem_planes and comp_planes are <= 2. How does the compiler
calculate an error subscript of 2/3 ?

Guenter