linux-kernel - Re: [syzbot] [can?] possible deadlock in j1939_sk_queue_drop

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Message-ID: <0000000000002755ce061389d67b@google.com>
Date: Wed, 13 Mar 2024 05:23:04 -0700
From: syzbot <syzbot+3bd970a1887812621b4c@...kaller.appspotmail.com>
To: astrajoan@...oo.com, davem@...emloft.net, edumazet@...gle.com, 
	hdanton@...a.com, kernel@...gutronix.de, kuba@...nel.org, 
	linux-can@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux@...pel-privat.de, mkl@...gutronix.de, netdev@...r.kernel.org, 
	o.rempel@...gutronix.de, pabeni@...hat.com, robin@...tonic.nl, 
	socketcan@...tkopp.net, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [can?] possible deadlock in j1939_sk_queue_drop_all

syzbot suspects this issue was fixed by commit:

commit 6cdedc18ba7b9dacc36466e27e3267d201948c8d
Author: Ziqi Zhao <astrajoan@...oo.com>
Date:   Fri Jul 21 16:22:26 2023 +0000

    can: j1939: prevent deadlock by changing j1939_socks_lock to rwlock

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10e4d371180000
start commit:   dd72f9c7e512 Merge tag 'spi-fix-v6-6-rc4' of git://git.ker..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=12abf4cc4f802b24
dashboard link: https://syzkaller.appspot.com/bug?extid=3bd970a1887812621b4c
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17602089680000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13398a9d680000

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

#syz fix: can: j1939: prevent deadlock by changing j1939_socks_lock to rwlock

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