linux-kernel - Re: [PATCH] net: Remove the source address setting in connect() for UDP

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Message-Id: <20190906.091350.2133455010162259391.davem@davemloft.net>
Date:   Fri, 06 Sep 2019 09:13:50 +0200 (CEST)
From:   David Miller <davem@...emloft.net>
To:     enkechen@...co.com
Cc:     kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        xe-linux-external@...co.com
Subject: Re: [PATCH] net: Remove the source address setting in connect()
 for UDP

From: Enke Chen <enkechen@...co.com>
Date: Thu,  5 Sep 2019 19:54:37 -0700

> The connect() system call for a UDP socket is for setting the destination
> address and port. But the current code mistakenly sets the source address
> for the socket as well. Remove the source address setting in connect() for
> UDP in this patch.

Do you have any idea how many decades of precedence this behavior has and
therefore how much you potentially will break userspace?

This boat has sailed a long time ago I'm afraid.