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

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Message-ID: <676bac46.050a0220.2f3838.02c0.GAE@google.com>
Date: Tue, 24 Dec 2024 22:55:02 -0800
From: syzbot <syzbot+1a93ee5d329e97cfbaff@...kaller.appspotmail.com>
To: andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org, brauner@...nel.org, 
	daniel@...earbox.net, elic@...dia.com, haoluo@...gle.com, 
	jakub@...udflare.com, jasowang@...hat.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, mhiramat@...nel.org, mst@...hat.com, 
	netdev@...r.kernel.org, parav@...dia.com, rostedt@...dmis.org, sdf@...gle.com, 
	song@...nel.org, syzkaller-bugs@...glegroups.com, tglx@...utronix.de, 
	yonghong.song@...ux.dev
Subject: Re: [syzbot] [bpf?] [trace?] possible deadlock in task_fork_fair

syzbot suspects this issue was fixed by commit:

commit ff91059932401894e6c86341915615c5eb0eca48
Author: Jakub Sitnicki <jakub@...udflare.com>
Date:   Tue Apr 2 10:46:21 2024 +0000

    bpf, sockmap: Prevent lock inversion deadlock in map delete elem

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16e922f8580000
start commit:   fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=aef2a55903e5791c
dashboard link: https://syzkaller.appspot.com/bug?extid=1a93ee5d329e97cfbaff
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=128b2d33180000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10fe01eb180000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: bpf, sockmap: Prevent lock inversion deadlock in map delete elem

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