linux-kernel - Re: [syzbot] [ext4?] [overlayfs?] WARNING in file_seek_cur_needs_f

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Message-ID: <67f43f29.050a0220.396535.0554.GAE@google.com>
Date: Mon, 07 Apr 2025 14:10:01 -0700
From: syzbot <syzbot+4036165fc595a74b09b2@...kaller.appspotmail.com>
To: adilger.kernel@...ger.ca, amir73il@...il.com, dhowells@...hat.com, 
	edumazet@...gle.com, linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-unionfs@...r.kernel.org, miklos@...redi.hu, sven@...fation.org, 
	sw@...onwunderlich.de, syzkaller-bugs@...glegroups.com, tytso@....edu
Subject: Re: [syzbot] [ext4?] [overlayfs?] WARNING in file_seek_cur_needs_f_lock

syzbot has bisected this issue to:

commit 00b35530811f2aa3d7ceec2dbada80861c7632a8
Author: Eric Dumazet <edumazet@...gle.com>
Date:   Thu Feb 6 14:04:22 2025 +0000

    batman-adv: adopt netdev_hold() / netdev_put()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=175f8c04580000
start commit:   16cd1c265776 Merge tag 'timers-cleanups-2025-04-06' of git..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=14df8c04580000
console output: https://syzkaller.appspot.com/x/log.txt?x=10df8c04580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c79406130aa88d22
dashboard link: https://syzkaller.appspot.com/bug?extid=4036165fc595a74b09b2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14f9bd98580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1571c7e4580000

Reported-by: syzbot+4036165fc595a74b09b2@...kaller.appspotmail.com
Fixes: 00b35530811f ("batman-adv: adopt netdev_hold() / netdev_put()")

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