linux-hardening - Re: [PATCH v4] netlink: Bounds-check struct nlmsgerr creation

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Message-Id: <166238641462.11602.3818616103545497339.git-patchwork-notify@kernel.org>
Date:   Mon, 05 Sep 2022 14:00:14 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Kees Cook <keescook@...omium.org>
Cc:     kuba@...nel.org, pablo@...filter.org, kadlec@...filter.org,
        fw@...len.de, davem@...emloft.net, edumazet@...gle.com,
        pabeni@...hat.com, syzkaller@...glegroups.com,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        netdev@...r.kernel.org, socketcan@...tkopp.net,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH v4] netlink: Bounds-check struct nlmsgerr creation

Hello:

This patch was applied to netdev/net-next.git (master)
by David S. Miller <davem@...emloft.net>:

On Fri,  2 Sep 2022 21:37:49 -0700 you wrote:
> In preparation for FORTIFY_SOURCE doing bounds-check on memcpy(),
> switch from __nlmsg_put to nlmsg_put(), and explain the bounds check
> for dealing with the memcpy() across a composite flexible array struct.
> Avoids this future run-time warning:
> 
>   memcpy: detected field-spanning write (size 32) of single field "&errmsg->msg" at net/netlink/af_netlink.c:2447 (size 16)
> 
> [...]

Here is the summary with links:
  - [v4] netlink: Bounds-check struct nlmsgerr creation
    https://git.kernel.org/netdev/net-next/c/710d21fdff9a

You are awesome, thank you!
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