netdev - Re: [syzbot] [fs?] WARNING in copy_mnt

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Message-ID: <68de326a.050a0220.25d7ab.0780.GAE@google.com>
Date: Thu, 02 Oct 2025 01:06:02 -0700
From: syzbot <syzbot+e0f8855a87443d6a2413@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, anna-maria@...utronix.de, 
	anna.schumaker@...cle.com, bodonnel@...hat.com, brauner@...nel.org, 
	cgroups@...r.kernel.org, cyphar@...har.com, davem@...emloft.net, 
	edumazet@...gle.com, frederic@...nel.org, hannes@...xchg.org, 
	horms@...nel.org, jack@...e.cz, jlayton@...nel.org, joel.granados@...nel.org, 
	kuba@...nel.org, kuniyu@...gle.com, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, mawupeng1@...wei.com, mkoutny@...e.com, 
	netdev@...r.kernel.org, pabeni@...hat.com, rostedt@...dmis.org, 
	sd@...asysnail.net, syzkaller-bugs@...glegroups.com, tglx@...utronix.de, 
	tj@...nel.org, viro@...iv.linux.org.uk
Subject: Re: [syzbot] [fs?] WARNING in copy_mnt_ns

syzbot has bisected this issue to:

commit be5f21d3985f00827e09b798f7a07ebd6dd7f54a
Author: Christian Brauner <brauner@...nel.org>
Date:   Wed Sep 17 10:28:08 2025 +0000

    ns: add ns_common_free()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=135eeee2580000
start commit:   50c19e20ed2e Merge tag 'nolibc-20250928-for-6.18-1' of git..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=10deeee2580000
console output: https://syzkaller.appspot.com/x/log.txt?x=175eeee2580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=8f1ac8502efee0ee
dashboard link: https://syzkaller.appspot.com/bug?extid=e0f8855a87443d6a2413
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1374b858580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15602092580000

Reported-by: syzbot+e0f8855a87443d6a2413@...kaller.appspotmail.com
Fixes: be5f21d3985f ("ns: add ns_common_free()")

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