linux-kernel - Re: [syzbot] [fs?] kernel BUG in sctp_getsockopt_peeloff

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Message-ID: <20251201140707.GF3538@ZenIV>
Date: Mon, 1 Dec 2025 14:07:07 +0000
From: Al Viro <viro@...iv.linux.org.uk>
To: Mateusz Guzik <mjguzik@...il.com>
Cc: syzbot <syzbot+984a5c208d87765b2ee7@...kaller.appspotmail.com>,
	brauner@...nel.org, jack@...e.cz, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [syzbot] [fs?] kernel BUG in sctp_getsockopt_peeloff_common

On Mon, Dec 01, 2025 at 01:57:11PM +0100, Mateusz Guzik wrote:

> I suspect this is botched error handling in the recent conversion to
> FD_PREPARE machinery.

Quite.  FWIW, at that point I believe that FD_ADD/FD_PREPARE branch
is simply not ready - too little time in -next, if nothing else.

Christian, drop that pull request, please.