Bug 1496209 - undefined instruction in modprobe
Summary: undefined instruction in modprobe
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 27
Hardware: aarch64
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-09-26 16:34 UTC by John Reiser
Modified: 2018-02-20 22:53 UTC (History)
23 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2018-02-20 22:53:07 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)
screen photo of console showing modprobe complaints (176.96 KB, image/jpeg)
2017-09-26 16:34 UTC, John Reiser
no flags Details

Description John Reiser 2017-09-26 16:34:24 UTC
Created attachment 1331211 [details]
screen photo of console showing modprobe complaints

Description of problem:
Fedora-Minimal-27_Beta-1.3.aarch64.raw.xz booted on RaspberryPi 3B complains twice:
  modprobe[<PID>]: undefined instruction: pc=<PC>
  Code: d503201f 8a180320 92750001 365ffc20 (d5380001)
with PID of 107 and 108, and PC of 0000ffff9012f444 and 0000ffff99395444.
According to gdb that instruction stream is:
  nop
  and x0, x25, x24
  and x1, x0, #0x800
  tbz w0, #11, 0xffffffffffffff90
  mrs x1, midr_el1


Version-Release number of selected component (if applicable):
Fedora-Minimal-27_Beta-1.3.aarch64.raw.xz

How reproducible: every time


Steps to Reproduce:
1. download Fedora-Minimal-27_Beta-1.3.aarch64.raw.xz
2. xzcat Fedora-Minimal-27_Beta-1.3.aarch64.raw.xz | dd of=/dev/sdX bs=4M
3. boot RaspberryPi 3B using the uSDHC card written by 'dd'

Actual results: modprobe complains of undefined instruction as in Description


Expected results: no complaints


Additional info: will attach screen photo

Comment 1 Laura Abbott 2018-02-20 19:49:25 UTC
We apologize for the inconvenience.  There is a large number of bugs to go through and several of them have gone stale.  As kernel maintainers, we try to keep up with bugzilla but due the rate at which the upstream kernel project moves, bugs may be fixed without any indication to us. Due to this, we are doing a mass bug update across all of the Fedora 27 kernel bugs.
 
Fedora 27 has now been rebased to 4.15.3-300.f27.  Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel.
 
If you experience different issues, please open a new bug report for those.

Comment 2 John Reiser 2018-02-20 22:53:07 UTC
The complaint from modprobe is no longer seen using kernel
   4.16.0-0.rc2.git0.1.fc28.aarch64 #1 SMP Mon Feb 19 14:29:53 UTC 2018
as found in 
   Fedora-Minimal-Rawhide-20180220.n.0.aarch64.raw.xz


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