linux-hardening - Re: [PATCH] net/sun3_82586: Avoid reading past buffer in debug output

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Date: Fri, 09 Feb 2024 03:11:08 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Kees Cook <keescook@...omium.org>
Cc: sammy@...my.net, davem@...emloft.net, edumazet@...gle.com,
 kuba@...nel.org, pabeni@...hat.com, gustavoars@...nel.org,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-hardening@...r.kernel.org
Subject: Re: [PATCH] net/sun3_82586: Avoid reading past buffer in debug output

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Tue,  6 Feb 2024 08:16:54 -0800 you wrote:
> Since NUM_XMIT_BUFFS is always 1, building m68k with sun3_defconfig and
> -Warraybounds, this build warning is visible[1]:
> 
> drivers/net/ethernet/i825xx/sun3_82586.c: In function 'sun3_82586_timeout':
> drivers/net/ethernet/i825xx/sun3_82586.c:990:122: warning: array subscript 1 is above array bounds of 'volatile struct transmit_cmd_struct *[1]' [-Warray-bounds=]
>   990 |                 printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status));
>       |                                                                                                               ~~~~~~~~~~~~^~~
> ...
> drivers/net/ethernet/i825xx/sun3_82586.c:156:46: note: while referencing 'xmit_cmds'
>   156 |         volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
> 
> [...]

Here is the summary with links:
  - net/sun3_82586: Avoid reading past buffer in debug output
    https://git.kernel.org/netdev/net-next/c/4bea747f3fbe

You are awesome, thank you!
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