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

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Message-ID: <68de7f87.a00a0220.102ee.00a5.GAE@google.com>
Date: Thu, 02 Oct 2025 06:35:03 -0700
From: syzbot <syzbot+7d23dc5cd4fa132fb9f3@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, anna-maria@...utronix.de, brauner@...nel.org, 
	cgroups@...r.kernel.org, cminyard@...sta.com, cyphar@...har.com, 
	davem@...emloft.net, djwong@...nel.org, edumazet@...gle.com, 
	frederic@...nel.org, hannes@...xchg.org, hdanton@...a.com, 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, sd@...asysnail.net, 
	syzkaller-bugs@...glegroups.com, tglx@...utronix.de, tj@...nel.org, 
	viro@...iv.linux.org.uk, wei.liu@...nel.org
Subject: Re: [syzbot] [fs?] WARNING in free_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=124fb6e2580000
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=114fb6e2580000
console output: https://syzkaller.appspot.com/x/log.txt?x=164fb6e2580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=8f1ac8502efee0ee
dashboard link: https://syzkaller.appspot.com/bug?extid=7d23dc5cd4fa132fb9f3
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15842092580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=132946e2580000

Reported-by: syzbot+7d23dc5cd4fa132fb9f3@...kaller.appspotmail.com
Fixes: be5f21d3985f ("ns: add ns_common_free()")

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