UBSAN: array-index-out-of-bounds in /build/linux-hwe-6.5-ZV1Qen/linux-hwe-6.5-6.5.0

[Luiz Carlos da Silveira Júnior]

This error occurred on my PC when booting Ubuntu from 22.04/24.04 in any flavor, in Zorin and also with Pop!_OS 22.04.

Looks like a new kernel issue. It seems to me that it has to do with Kernel 6.5, 6.8 +.

Should I be worried about this?

The problem does not occur in Fedora 39 or Debian 12.

```
May 17 00:10:28 ubuntu kernel: [drm] radeon: 1024M of VRAM memory ready
May 17 00:10:28 ubuntu kernel: [drm] radeon: 2048M of GTT memory ready.
May 17 00:10:28 ubuntu kernel: [drm] Loading verde Microcode
May 17 00:10:28 ubuntu kernel: [drm] Internal thermal controller without fan control
May 17 00:10:28 ubuntu kernel: ================================================================================
May 17 00:10:28 ubuntu kernel: UBSAN: array-index-out-of-bounds in /build/linux-hwe-6.5-ZV1Qen/linux-hwe-6.5-6.5.0/drivers/gpu/drm/radeon/radeon_atombios.c:2717:34
May 17 00:10:28 ubuntu kernel: index 48 is out of range for type 'UCHAR [1]'
May 17 00:10:28 ubuntu kernel: CPU: 0 PID: 7 Comm: kworker/0:0 Not tainted 6.5.0-18-generic #18~22.04.1-Ubuntu
May 17 00:10:28 ubuntu kernel: Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./760GM-HD, BIOS P1.00 06/11/2019
May 17 00:10:28 ubuntu kernel: Workqueue: events work_for_cpu_fn
May 17 00:10:28 ubuntu kernel: Call Trace:
May 17 00:10:28 ubuntu kernel: <TASK>
May 17 00:10:28 ubuntu kernel: dump_stack_lvl+0x48/0x70
May 17 00:10:28 ubuntu kernel: dump_stack+0x10/0x20
May 17 00:10:28 ubuntu kernel: __ubsan_handle_out_of_bounds+0xc6/0x110
May 17 00:10:28 ubuntu kernel: radeon_atombios_parse_power_table_6+0x39c/0x3d0 [radeon]
May 17 00:10:28 ubuntu kernel: radeon_atombios_get_power_modes+0x1e9/0x210 [radeon]
May 17 00:10:28 ubuntu kernel: radeon_pm_init_dpm+0x8e/0x2f0 [radeon]
May 17 00:10:28 ubuntu kernel: radeon_pm_init+0xdf/0x120 [radeon]
May 17 00:10:28 ubuntu kernel: si_init+0x26b/0x620 [radeon]
May 17 00:10:28 ubuntu kernel: radeon_device_init+0x57e/0xaf0 [radeon]
May 17 00:10:28 ubuntu kernel: radeon_driver_load_kms+0xcc/0x300 [
```

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: ubuntu-release-upgrader-core 1:22.04.19 [origin: unknown]
ProcVersionSignature: Ubuntu 6.5.0-18.18~22.04.1-generic 6.5.8
Uname: Linux 6.5.0-18-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: unknown
CasperVersion: 1.470.2
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Fri May 17 00:13:10 2024
LiveMediaBuild: Ubuntu 22.04.4 LTS "Jammy Jellyfish" - Release amd64 (20240220)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
Symptom: dist-upgrade
UpgradeStatus: No upgrade log present (probably fresh install)