linux-kernel - Re: KASAN: use-after-free Read in netdevice_event_work

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Date:   Wed, 22 Jul 2020 13:29:04 -0700
From:   syzbot <syzbot+20b90969babe05609947@...kaller.appspotmail.com>
To:     andrew@...n.ch, davem@...emloft.net, dledford@...hat.com,
        f.fainelli@...il.com, hkallweit1@...il.com, jgg@...pe.ca,
        kuba@...nel.org, linux-kernel@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux@...linux.org.uk,
        netdev@...r.kernel.org, rkovhaev@...il.com,
        syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: use-after-free Read in netdevice_event_work_handler

syzbot has bisected this issue to:

commit d70c47c8dc6902db19555b7ff7e6eeb264d4ac06
Author: Heiner Kallweit <hkallweit1@...il.com>
Date:   Thu Apr 23 19:34:33 2020 +0000

    net: phy: make phy_suspend a no-op if PHY is suspended already

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16b2aad8900000
start commit:   0bddd227 Documentation: update for gcc 4.9 requirement
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=15b2aad8900000
console output: https://syzkaller.appspot.com/x/log.txt?x=11b2aad8900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=66ad203c2bb6d8b
dashboard link: https://syzkaller.appspot.com/bug?extid=20b90969babe05609947
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12a8edff100000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=167d3bb7100000

Reported-by: syzbot+20b90969babe05609947@...kaller.appspotmail.com
Fixes: d70c47c8dc69 ("net: phy: make phy_suspend a no-op if PHY is suspended already")

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