linux-kernel - Re: [syzbot] [bpf?] possible deadlock in __lock_task

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Date: Tue, 28 May 2024 07:10:04 -0700
From: syzbot <syzbot+f2ed7d5888894fedf676@...kaller.appspotmail.com>
To: andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org, 
	clang-built-linux@...glegroups.com, daniel@...earbox.net, davem@...emloft.net, 
	eddyz87@...il.com, haoluo@...gle.com, hawk@...nel.org, 
	john.fastabend@...il.com, jolsa@...nel.org, kafai@...com, kpsingh@...nel.org, 
	kuba@...nel.org, linux-kernel@...r.kernel.org, martin.lau@...ux.dev, 
	mingo@...hat.com, nathan@...nel.org, ndesaulniers@...gle.com, 
	netdev@...r.kernel.org, rostedt@...dmis.org, sdf@...gle.com, song@...nel.org, 
	songliubraving@...com, syzkaller-bugs@...glegroups.com, yhs@...com, 
	yonghong.song@...ux.dev
Subject: Re: [syzbot] [bpf?] possible deadlock in __lock_task_sighand (3)

syzbot has bisected this issue to:

commit fbd94c7afcf99c9f3b1ba1168657ecc428eb2c8d
Author: Alexei Starovoitov <ast@...nel.org>
Date:   Wed Dec 1 18:10:28 2021 +0000

    bpf: Pass a set of bpf_core_relo-s to prog_load command.

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=149b9a2c980000
start commit:   30a92c9e3d6b openvswitch: Set the skbuff pkt_type for prop..
git tree:       net
final oops:     https://syzkaller.appspot.com/x/report.txt?x=169b9a2c980000
console output: https://syzkaller.appspot.com/x/log.txt?x=129b9a2c980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=17ffd15f654c98ba
dashboard link: https://syzkaller.appspot.com/bug?extid=f2ed7d5888894fedf676
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16c203f0980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12046634980000

Reported-by: syzbot+f2ed7d5888894fedf676@...kaller.appspotmail.com
Fixes: fbd94c7afcf9 ("bpf: Pass a set of bpf_core_relo-s to prog_load command.")

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