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Date:   Wed, 30 Aug 2017 12:28:30 +0300
From:   "Andrey Jr. Melnikov" <>
Subject: Re: (Kernel Bug report) Make kaby lake cpu crash Ethernet

Chiwu Yung <> wrote:
> Hello Sir, i am using cpu i7 7700k kaby lake, i have no overclock the
> CPU but i think  i7 7700k come across with Ethernet crash issue. Don't
> know why  it will keeping crash.
> I tested the kernel since 4.8 - 4.12 almost 2-3months and i can see
> that the issue is still exist.
> Kernel error then the Ethernet is stop responded after that machine
> crash, i need to force reboot the computer.

> PS: there are no cpu overclock , latest Bios ver. Centos7 with 4.12.8 kernel

> Thank you for your help!

> --------------------------------------------------------
> Error Log
> --------------------------------------------------------
> enp:s 6: Reset adapter unexpectedly[47438.8192131 e1808e 8000:88:11.6
> enp8s31f6: Reset adapter unexpectedly
> [112822.759818] el008e 8800:88:1f.6 enp0s3116: Reset adapter
> unexpectedly 1112838.119047] el888e 8808:80:1f.6 enp8s31f6: Reset
> adapter unexpectedly
> [112852-967086] e1800e 8000:00:11.6 enp8s31f6: Reset adapter
> unexpectedly 1128194.823488] e1000e 0008:80:1f.6 enp8s31f6: Reset
> adapter unexpectedly
> [128213.991461] e1808e 0000:00:11.6 enp8s31f6: Reset adapter unexpectedly
> [128228.839481] 0.800e 0000:08:1f.6 enp8s31f6: Reset adapter unexpectedly
> [128283.111491] el880e 0808:08:11.6 enp0s31f6: Reset adapter unexpectedly
> [123287.815631] e1800e 0000:08:11.6 enp8s31f6: Reset adapter
> unexpectedly 1124878.8237221 el888e 0088:00:1f.6 enp0s3116: Reset
> adapter unexpectedly

Check memory. Note driver name stranformation in logs:

'el008e 8800:88:1f.6 enp0s3116' vs 'el888e 8808:80:1f.6 enp8s31f6'
'e1800e 8000:00:11.6 enp8s31f6' vs 'e1000e 0008:80:1f.6 enp8s31f6'
'e1808e 0000:00:11.6 enp8s31f6' vs '0.800e 0000:08:1f.6 enp8s31f6'
'el880e 0808:08:11.6 enp0s31f6' vs 'e1800e 0000:08:11.6 enp8s31f6'

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