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Apologies if what this post will entail is not the correct way to report
a bug. This is my first time reporting one for a linux distro, and I'm
more or less doing so based on information I was told while
investigating a separate issue related to my audio devices.
On boot, along with the error I was looking for, I noticed a number of
UBSan errors pop up. I asked about them in a linux-related discord
server and their first question was whether the kernel was compiled with
Clang. Now, because I never mess with the kernel, I told them I wasn't
sure. That was when they told me that it's a kernel bug that invoked
undefined behavior and left my kernel in an erroneous state. Here are
the errors in question:
[ 5.036942] UBSAN: array-index-out-of-bounds in
/build/linux-SXblTa/linux-6.5.0/drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:3669:4
[ 5.036951] index 2 is out of range for type
'ATOM_Tonga_MCLK_Dependency_Record [1]'
[ 5.041843] UBSAN: array-index-out-of-bounds in
/build/linux-SXblTa/linux-6.5.0/drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:3676:4
[ 5.041852] index 7 is out of range for type
'ATOM_Polaris_SCLK_Dependency_Record [1]'
Because I'm not 100% sure what all goes into a bug report like this, I
will be providing the output of lsb_release -rd, hyfetch, and creating a
list of my system's specs in hopes that it will help provide some sort
of clarity.
lsb_release -rd Output:
-----------------------
No LSB modules are available.
Description: Ubuntu 23.10
Release: 23.10
Hyfetch Output:
---------------
OS: Kubuntu 23.10 x86_64
Kernel: 6.5.0-14-generic
Uptime: 28 mins
Packages: 3 (pipx), 4178 (dpkg), 43 (flatpak), 24 (snap)
Shell: fish 3.6.1 (yes I know it's deprecated but I prefer it over other shells)
Resolution: 1920x1080, 1920x1080
DE: Plasma 5.27.8 [KF5 5.110.0] [Qt 5.15.10] (x11)
WM: KWin
System Specs:
-------------
CPU: AMD Ryzen 5 2600x
GPU: Sapphire NITRO+ Radeon RX 570
MOBO: ASUS PRIME B450M-A II
RAM: TEAMGROUP TUFF Gaming 2x8 GB at 2400 MHz
PSU: Corsair RM850x (850W PSU)
SSD: Western Digital Blue 1 TB SSD
I'll be honest and say I'm not even sure if my system specs are required
for a bug report like this, but just in case I figured I'd provide them
anyway, as maybe it's a hardware-specific thing, or something specific
to my system entirely. I'm not sure though. I also went ahead and
included an attachment of the photo I took of the error itself, maybe
it'll help in some way. I'm also unsure if there's a package related to
this bug, or what that package would be. Sorry.
As for the last two things stated in the guidelines for reporting a bug,
what I expected to happen was to see the error about my USB device along
with some of the general jargon that pops up on boot that I typically
don't have to worry about. Instead what happened is that based on what
someone else told me, I found a bug in my kernel, although I'm not
knowledgeable enough to know if it's a serious bug, or something that's
really not that big of a deal. I'll leave that one up to you guys
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: bot-comment
--
Kubuntu 23.10: Kernel Bug Invoking Undefined Behavior on Boot
https://bugs.launchpad.net/bugs/2045992
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