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Date:   Sun, 26 Jan 2020 07:25:02 -0800
From:   syzbot <syzbot+c22c6b9dce8e773ddcb6@...kaller.appspotmail.com>
To:     davem@...emloft.net, edumazet@...gle.com, jhs@...atatu.com,
        jiri@...nulli.us, kuba@...nel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        xiyou.wangcong@...il.com
Subject: Re: INFO: rcu detected stall in addrconf_rs_timer (3)

syzbot suspects this bug was fixed by commit:

commit d9e15a2733067c9328fb56d98fe8e574fa19ec31
Author: Eric Dumazet <edumazet@...gle.com>
Date:   Mon Jan 6 14:10:39 2020 +0000

    pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1625d479e00000
start commit:   a1ec57c0 net: stmmac: tc: Fix TAPRIO division operation
git tree:       net-next
kernel config:  https://syzkaller.appspot.com/x/.config?x=7159d94cd4de714e
dashboard link: https://syzkaller.appspot.com/bug?extid=c22c6b9dce8e773ddcb6
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=168e33b6e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=178c160ae00000

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

#syz fix: pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM

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

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