linux-kernel - Re: [syzbot] [kernel?] INFO: rcu detected stall in sys_clock

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Message-ID: <0000000000003341ba0606672c7a@google.com>
Date:   Thu, 28 Sep 2023 01:34:13 -0700
From:   syzbot <syzbot+43cc00d616820666f675@...kaller.appspotmail.com>
To:     edumazet@...gle.com, hdanton@...a.com, jhs@...atatu.com,
        linux-kernel@...r.kernel.org, michal.kubiak@...el.com,
        netdev@...r.kernel.org, pabeni@...hat.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de
Subject: Re: [syzbot] [kernel?] INFO: rcu detected stall in
 sys_clock_nanosleep (5)

syzbot suspects this issue was fixed by commit:

commit 8c21ab1bae945686c602c5bfa4e3f3352c2452c5
Author: Eric Dumazet <edumazet@...gle.com>
Date:   Tue Aug 29 12:35:41 2023 +0000

    net/sched: fq_pie: avoid stalls in fq_pie_timer()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12958976680000
start commit:   6709d4b7bc2e net: nfc: Fix use-after-free caused by nfc_ll..
git tree:       net
kernel config:  https://syzkaller.appspot.com/x/.config?x=2cbd298d0aff1140
dashboard link: https://syzkaller.appspot.com/bug?extid=43cc00d616820666f675
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10858fc0a80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14781270a80000

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

#syz fix: net/sched: fq_pie: avoid stalls in fq_pie_timer()

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