linux-kernel - Re: possible deadlock in sch_direct

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Message-ID: <000000000000ac9246059abb072c@google.com>
Date:   Fri, 27 Dec 2019 19:16:01 -0800
From:   syzbot <syzbot+29cc278357da941e304e@...kaller.appspotmail.com>
To:     ap420073@...il.com, davem@...emloft.net, ecree@...arflare.com,
        edumazet@...gle.com, jhs@...atatu.com, jiri@...lanox.com,
        jiri@...nulli.us, kuznet@....inr.ac.ru,
        linux-kernel@...r.kernel.org, lucien.xin@...il.com,
        mcroce@...hat.com, netdev@...r.kernel.org, pabeni@...hat.com,
        syzkaller-bugs@...glegroups.com, xiyou.wangcong@...il.com,
        yoshfuji@...ux-ipv6.org
Subject: Re: possible deadlock in sch_direct_xmit

syzbot suspects this bug was fixed by commit:

commit 323ebb61e32b478e2432c5a3cbf9e2ca678a9609
Author: Edward Cree <ecree@...arflare.com>
Date:   Tue Aug 6 13:53:55 2019 +0000

     net: use listified RX for handling GRO_NORMAL skbs

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14647ab9e00000
start commit:   c92a9a46
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=46986c099cb53bc6
dashboard link: https://syzkaller.appspot.com/bug?extid=29cc278357da941e304e
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=143636c9800000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16856849800000

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

#syz fix: net: use listified RX for handling GRO_NORMAL skbs

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