syzbot has bisected this issue to:
commit 65b27995a4ab8fc51b4adc6b4dcdca20f7a595bb
Author: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Date: Mon Aug 12 21:52:19 2019 +0000
net: phy: let phy_speed_down/up support speeds >1Gbps
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1327ef50900000
start commit: 83bdc727 random32: remove net_rand_state from the latent e..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=10a7ef50900000
console output: https://syzkaller.appspot.com/x/log.txt?x=1727ef50900000
kernel config: https://syzkaller.appspot.com/x/.config?x=e59ee776d5aa8d55
dashboard link: https://syzkaller.appspot.com/bug?extid=99efc1c133eff186721a
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12429014900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12dbc404900000
Reported-by: syzbot+99efc1c133eff186721a@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 65b27995a4ab ("net: phy: let phy_speed_down/up support speeds >1Gbps")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
