linux-kernel - Re: [syzbot] [bpf?] [trace?] WARNING: locking bug in __lock_task

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Message-ID: <6787a036.050a0220.20d369.0012.GAE@google.com>
Date: Wed, 15 Jan 2025 03:47:02 -0800
From: syzbot <syzbot+97da3d7e0112d59971de@...kaller.appspotmail.com>
To: alexei.starovoitov@...il.com, andrii@...nel.org, ast@...nel.org, 
	bpf@...r.kernel.org, daniel@...earbox.net, eddyz87@...il.com, 
	haoluo@...gle.com, john.fastabend@...il.com, jolsa@...nel.org, 
	kpsingh@...nel.org, linux-kernel@...r.kernel.org, 
	linux-trace-kernel@...r.kernel.org, martin.lau@...ux.dev, 
	mathieu.desnoyers@...icios.com, mattbobrowski@...gle.com, mhiramat@...nel.org, 
	puranjay@...nel.org, rostedt@...dmis.org, sdf@...ichev.me, song@...nel.org, 
	syzkaller-bugs@...glegroups.com, yonghong.song@...ux.dev
Subject: Re: [syzbot] [bpf?] [trace?] WARNING: locking bug in __lock_task_sighand

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
lost connection to test machine

Tested on:

commit:         c547a7b6 bpf: trace: send signals asynchronously if !p..
git tree:       https://github.com/puranjaymohan/bpf.git bpf_preemt_fix
console output: https://syzkaller.appspot.com/x/log.txt?x=178257c4580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=aadf89e2f6db86cc
dashboard link: https://syzkaller.appspot.com/bug?extid=97da3d7e0112d59971de
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.