linux-kernel - Re: [PATCH] y2038: fix socket.h header inclusion

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Message-ID: <87o968y1uv.fsf@mid.deneb.enyo.de>
Date:   Mon, 18 Mar 2019 10:21:28 +0100
From:   Florian Weimer <fw@...eb.enyo.de>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Deepa Dinamani <deepa.kernel@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Willem de Bruijn <willemb@...gle.com>,
        alpha <linux-alpha@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        linux-mips@...r.kernel.org,
        Parisc List <linux-parisc@...r.kernel.org>,
        sparclinux <sparclinux@...r.kernel.org>,
        Laura Abbott <labbott@...hat.com>,
        Networking <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux API <linux-api@...r.kernel.org>,
        Josh Boyer <jwboyer@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jeff Law <law@...hat.com>
Subject: Re: [PATCH] y2038: fix socket.h header inclusion

* Arnd Bergmann:

> Should we just remove __kernel_fd_set from the exported headers and
> define the internal fd_set directly in include/linux/types.h? (Adding the
> folks from the old thread to Cc).

The type is used in the sanitizers, but incorrectly.  They assume that
FD_SETSIZE is always 1024.  (The existence of __kernel_fd_set is
itself somewhat questionable because it leads to such bugs.)  Moving
around the type could cause a build failure in the sanitizers, but I'm
not entirely clear how the UAPI headers are included there.

Otherwise, I couldn't find any uses.