Booting from 4.13 leads to Oops: NULL pointer dereference - RIP: isci_task_abort_task+0x30/0x3e0 [isci]

[Saverio Proto]

I cannot boot from 4.13.0-21-generic

Oops: NULL pointer dereference - RIP: isci_task_abort_task+0x30/0x3e0 [isci]

This Kernel bug was already fixed in Debian:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=882414

Relevant discussion:
https://marc.info/?l=linux-scsi&m=151523964725984&w=2

Ubuntu needs to fix this, because otherwise _many_ people will complain about crashes when they upgrade from 4.9 (or 4.4) to 4.13, which Ubuntu defined as their new “HWE” kernel.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1742630

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Saverio Proto (zioproto)]

The Kernel does not boot at all, so it is not possible to collect the data with apport-collect

[Saverio Proto (zioproto)]

I have tested this version linux-image-generic-hwe-16.04 4.13.0.26.46
It does not work for me

[Joseph Salisbury (jsalisbury)]

If this bug is happening with 4.13.0-21, it's probably not PTI related.

I'll build a test kernel with the commit you posted in the description and post it shortly.

[Joseph Salisbury (jsalisbury)]

I built a test kernel with the patch posted here:
https://marc.info/?l=linux-scsi&m=151557324907914

The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1742630

Can you test this kernel and see if it resolves this bug?

[Saverio Proto (zioproto)]

I have the kernel running and I confirm that it resolved the bug

Linux s0008 4.13.0-25-generic #29~lp1742630 SMP Thu Jan 11 18:42:42 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

thank you

[Joseph Salisbury (jsalisbury)]

This bug and bug 1726519 are probably duplicates.