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

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Message-ID: <692e11fe.a70a0220.d98e3.018e.GAE@google.com>
Date: Mon, 01 Dec 2025 14:09:02 -0800
From: syzbot <syzbot+984a5c208d87765b2ee7@...kaller.appspotmail.com>
To: brauner@...nel.org, davem@...emloft.net, edumazet@...gle.com, 
	horms@...nel.org, jack@...e.cz, kuba@...nel.org, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-sctp@...r.kernel.org, lucien.xin@...il.com, marcelo.leitner@...il.com, 
	mjguzik@...il.com, netdev@...r.kernel.org, pabeni@...hat.com, 
	syzkaller-bugs@...glegroups.com, torvalds@...ux-foundation.org, 
	viro@...iv.linux.org.uk
Subject: Re: [syzbot] [fs?] kernel BUG in sctp_getsockopt_peeloff_common

syzbot has bisected this issue to:

commit 457528eb27c3a3053181939ca65998477cc39c49
Author: Christian Brauner <brauner@...nel.org>
Date:   Sun Nov 23 16:33:47 2025 +0000

    net/sctp: convert sctp_getsockopt_peeloff_common() to FD_PREPARE()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1136a512580000
start commit:   7d31f578f323 Add linux-next specific files for 20251128
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1336a512580000
console output: https://syzkaller.appspot.com/x/log.txt?x=1536a512580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6336d8e94a7c517d
dashboard link: https://syzkaller.appspot.com/bug?extid=984a5c208d87765b2ee7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16a2322c580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12a3c512580000

Reported-by: syzbot+984a5c208d87765b2ee7@...kaller.appspotmail.com
Fixes: 457528eb27c3 ("net/sctp: convert sctp_getsockopt_peeloff_common() to FD_PREPARE()")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection