From: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
To: Eric Dumazet <edumazet@google.com>,
"David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Paolo Abeni <pabeni@redhat.com>
Cc: netdev@vger.kernel.org, eric.dumazet@gmail.com,
Eric Dumazet <edumazet@google.com>,
syzbot <syzkaller@googlegroups.com>,
Kees Cook <keescook@chromium.org>,
Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Subject: Re: [PATCH net-next] af_packet: avoid a false positive warning in packet_setsockopt()
Date: Sat, 06 Apr 2024 10:07:47 -0400 [thread overview]
Message-ID: <66115733b397a_16bd4c29423@willemb.c.googlers.com.notmuch> (raw)
In-Reply-To: <20240405114939.188821-1-edumazet@google.com>
Eric Dumazet wrote:
> Although the code is correct, the following line
>
> copy_from_sockptr(&req_u.req, optval, len));
>
> triggers this warning :
>
> memcpy: detected field-spanning write (size 28) of single field "dst" at include/linux/sockptr.h:49 (size 16)
>
> Refactor the code to be more explicit.
>
> Reported-by: syzbot <syzkaller@googlegroups.com>
> Signed-off-by: Eric Dumazet <edumazet@google.com>
> Cc: Kees Cook <keescook@chromium.org>
> Cc: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
next prev parent reply other threads:[~2024-04-06 14:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-05 11:49 [PATCH net-next] af_packet: avoid a false positive warning in packet_setsockopt() Eric Dumazet
2024-04-05 15:34 ` Kees Cook
2024-04-06 14:07 ` Willem de Bruijn [this message]
2024-04-08 12:21 ` patchwork-bot+netdevbpf
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