linux-hardening - Re: [PATCH] cxgb3: Avoid potential string truncation in desc

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Message-Id: 
 <170252162573.2494.15854060448020289393.git-patchwork-notify@kernel.org>
Date: Thu, 14 Dec 2023 02:40:25 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Kees Cook <keescook@...omium.org>
Cc: rajur@...lsio.com, lkp@...el.com, davem@...emloft.net,
 edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-hardening@...r.kernel.org
Subject: Re: [PATCH] cxgb3: Avoid potential string truncation in desc

Hello:

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

On Tue, 12 Dec 2023 14:09:57 -0800 you wrote:
> Builds with W=1 were warning about potential string truncations:
> 
> drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c: In function 'cxgb_up':
> drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c:394:38: warning: '%d' directive output may be truncated writing between 1 and 11 bytes into a region of size between 5 and 20 [-Wformat-truncation=]
>   394 |                                  "%s-%d", d->name, pi->first_qset + i);
>       |                                      ^~
> In function 'name_msix_vecs',
>     inlined from 'cxgb_up' at drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c:1264:3: drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c:394:34: note: directive argument in the range [-2147483641, 509]
>   394 |                                  "%s-%d", d->name, pi->first_qset + i);
>       |                                  ^~~~~~~
> drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c:393:25: note: 'snprintf' output between 3 and 28 bytes into a destination of size 21
>   393 |                         snprintf(adap->msix_info[msi_idx].desc, n,
>       |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>   394 |                                  "%s-%d", d->name, pi->first_qset + i);
>       |                                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> [...]

Here is the summary with links:
  - cxgb3: Avoid potential string truncation in desc
    https://git.kernel.org/netdev/net-next/c/bc044ae9d64b

You are awesome, thank you!
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