linux-kernel - Re: [PATCH v3] netlink: Return unsigned value for nla

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Message-Id: <170206442406.2842.16381176213819730158.git-patchwork-notify@kernel.org>
Date:   Fri, 08 Dec 2023 19:40:24 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Kees Cook <keescook@...omium.org>
Cc:     kuba@...nel.org, lkp@...el.com, davem@...emloft.net,
        edumazet@...gle.com, pabeni@...hat.com, johannes@...solutions.net,
        quic_jjohnson@...cinc.com, mwalle@...nel.org,
        max.schulze@...ine.de, netdev@...r.kernel.org,
        linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH v3] netlink: Return unsigned value for nla_len()

Hello:

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

On Wed,  6 Dec 2023 12:59:07 -0800 you wrote:
> The return value from nla_len() is never expected to be negative, and can
> never be more than struct nlattr::nla_len (a u16). Adjust the prototype
> on the function. This will let GCC's value range optimization passes
> know that the return can never be negative, and can never be larger than
> u16. As recently discussed[1], this silences the following warning in
> GCC 12+:
> 
> [...]

Here is the summary with links:
  - [v3] netlink: Return unsigned value for nla_len()
    https://git.kernel.org/netdev/net-next/c/172db56d90d2

You are awesome, thank you!
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