On Wed, Oct 9, 2024 at 8:55 AM D. Wythe <alibuda@xxxxxxxxxxxxxxxxx> wrote:
>
> From: "D. Wythe" <alibuda@xxxxxxxxxxxxxxxxx>
>
> Eric report a panic on IPPROTO_SMC, and give the facts
> that when INET_PROTOSW_ICSK was set, icsk->icsk_sync_mss must be set too.
>
>
> This patch add a toy implementation that performs a simple return to
> prevent such panic. This is because MSS can be set in sock_create_kern
> or smc_setsockopt, similar to how it's done in AF_SMC. However, for
> AF_SMC, there is currently no way to synchronize MSS within
> __sys_connect_file. This toy implementation lays the groundwork for us
> to support such feature for IPPROTO_SMC in the future.
>
> Fixes: d25a92ccae6b ("net/smc: Introduce IPPROTO_SMC")
> Reported-by: Eric Dumazet <edumazet@xxxxxxxxxx>
> Signed-off-by: D. Wythe <alibuda@xxxxxxxxxxxxxxxxx>
> ---
Reviewed-by: Eric Dumazet <edumazet@xxxxxxxxxx>
