Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/2045992
Title:
Kubuntu 23.10: Kernel Bug Invoking Undefined Behavior on Boot
Status in linux package in Ubuntu:
Confirmed
Bug description:
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
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