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Message-ID: <00000000000022eedd060649e522@google.com>
Date: Tue, 26 Sep 2023 14:38:26 -0700
From: syzbot <syzbot+b97d20ed568ce0951a06@...kaller.appspotmail.com>
To: andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org, 
	daniel@...earbox.net, haoluo@...gle.com, john.fastabend@...il.com, 
	jolsa@...nel.org, kpsingh@...nel.org, kuba@...nel.org, 
	linux-kernel@...r.kernel.org, martin.lau@...ux.dev, netdev@...r.kernel.org, 
	sdf@...gle.com, song@...nel.org, syzkaller-bugs@...glegroups.com, yhs@...com, 
	yonghong.song@...ux.dev
Subject: Re: [syzbot] [bpf?] WARNING in bpf_mprog_pos_before

syzbot has bisected this issue to:

commit e420bed025071a623d2720a92bc2245c84757ecb
Author: Daniel Borkmann <daniel@...earbox.net>
Date:   Wed Jul 19 14:08:52 2023 +0000

    bpf: Add fd-based tcx multi-prog infra with link support

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=116ab4b6680000
start commit:   a59addacf899 drivers/net: process the result of hdlc_open(..
git tree:       net
final oops:     https://syzkaller.appspot.com/x/report.txt?x=136ab4b6680000
console output: https://syzkaller.appspot.com/x/log.txt?x=156ab4b6680000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d594086f139d167
dashboard link: https://syzkaller.appspot.com/bug?extid=b97d20ed568ce0951a06
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10dc3946680000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=107f4e1e680000

Reported-by: syzbot+b97d20ed568ce0951a06@...kaller.appspotmail.com
Fixes: e420bed02507 ("bpf: Add fd-based tcx multi-prog infra with link support")

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

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