Comment 5 for bug 2037762

Hi all

I can confirm this problem on Kubuntu 22.04 LTS for an old Acer Aspire 6930G Laptop and kernel 6.5.0-18-generic. In dmesg I get:

[ 4.400118] resource: resource sanity check: requesting [mem 0x00000000000c0000-0x00000000000dffff], which spans more than PCI Bus 0000:00 [mem 0x000d4000-0x000dffff window]
[ 4.400124] caller pci_map_rom+0x6c/0x1d0 mapping multiple BARs
[ 4.400212] ATOM BIOS: Acer_MXM_B80602_M92XT_DDR2
[ 4.400253] radeon 0000:01:00.0: VRAM: 512M 0x0000000000000000 - 0x000000001FFFFFFF (512M used)
[ 4.400258] radeon 0000:01:00.0: GTT: 1024M 0x0000000020000000 - 0x000000005FFFFFFF
[ 4.400265] [drm] Detected VRAM RAM=512M, BAR=256M
[ 4.400267] [drm] RAM width 64bits DDR
[ 4.400499] [drm] radeon: 512M of VRAM memory ready
[ 4.400503] [drm] radeon: 1024M of GTT memory ready.
[ 4.400525] [drm] Loading RV710 Microcode
[ 4.401039] ================================================================================
[ 4.401047] fbcon: Taking over console
[ 4.401055] 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:2620:43
[ 4.401064] index 1 is out of range for type 'UCHAR [1]'
[ 4.401069] CPU: 0 PID: 117 Comm: systemd-udevd Not tainted 6.5.0-18-generic #18~22.04.1-Ubuntu
[ 4.401073] Hardware name: Acer Aspire 6930G /Makalu , BIOS v0.3238 07/28/2009
[ 4.401076] Call Trace:
[ 4.401079] <TASK>
[ 4.401083] dump_stack_lvl+0x48/0x70
[ 4.401093] dump_stack+0x10/0x20
[ 4.401096] __ubsan_handle_out_of_bounds+0xc6/0x110
[ 4.401103] radeon_atombios_parse_power_table_4_5+0x3c6/0x3e0 [radeon]
[ 4.401289] radeon_atombios_get_power_modes+0x205/0x210 [radeon]
[ 4.401404] radeon_pm_init_dpm+0x8e/0x2f0 [radeon]
[ 4.401550] radeon_pm_init+0xdf/0x120 [radeon]
[ 4.401695] rv770_init+0x1fa/0x3d0 [radeon]
[ 4.401839] radeon_device_init+0x57e/0xaf0 [radeon]
[ 4.401952] radeon_driver_load_kms+0xcc/0x300 [radeon]
[ 4.402066] drm_dev_register+0x10e/0x240 [drm]
[ 4.402187] radeon_pci_probe+0xec/0x180 [radeon]
[ 4.402298] local_pci_probe+0x47/0xb0
[ 4.402304] pci_call_probe+0x55/0x190
[ 4.402308] pci_device_probe+0x84/0x120
[ 4.402313] really_probe+0x1cc/0x430
[ 4.402318] __driver_probe_device+0x8c/0x190
[ 4.402322] driver_probe_device+0x24/0xd0
[ 4.402325] __driver_attach+0x10b/0x210
[ 4.402329] ? __pfx___driver_attach+0x10/0x10
[ 4.402332] bus_for_each_dev+0x8d/0xf0
[ 4.402338] driver_attach+0x1e/0x30
[ 4.402341] bus_add_driver+0x127/0x240
[ 4.402346] driver_register+0x5e/0x130
[ 4.402350] ? __pfx_radeon_module_init+0x10/0x10 [radeon]
[ 4.402461] __pci_register_driver+0x62/0x70
[ 4.402465] radeon_module_init+0x4c/0xff0 [radeon]
[ 4.402575] do_one_initcall+0x5e/0x340
[ 4.402582] do_init_module+0x68/0x260
[ 4.402587] load_module+0xb85/0xcd0
[ 4.402593] ? security_kernel_post_read_file+0x75/0x90
[ 4.402598] init_module_from_file+0x96/0x100
[ 4.402603] ? init_module_from_file+0x96/0x100
[ 4.402609] idempotent_init_module+0x11c/0x2b0
[ 4.402615] __x64_sys_finit_module+0x64/0xd0
[ 4.402620] do_syscall_64+0x5b/0x90
[ 4.402625] ? generic_file_llseek+0x24/0x40
[ 4.402630] ? ksys_lseek+0x80/0xd0
[ 4.402635] ? exit_to_user_mode_prepare+0x30/0xb0
[ 4.402638] ? syscall_exit_to_user_mode+0x37/0x60
[ 4.402643] ? do_syscall_64+0x67/0x90
[ 4.402646] ? syscall_exit_to_user_mode+0x37/0x60
[ 4.402650] ? do_syscall_64+0x67/0x90
[ 4.402654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[ 4.402660] RIP: 0033:0x7ffa446cd88d
[ 4.402670] Code: 5b 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 73 b5 0f 00 f7 d8 64 89 01 48
[ 4.402673] RSP: 002b:00007ffd4365fd78 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 4.402677] RAX: ffffffffffffffda RBX: 0000556ee8f6ef50 RCX: 00007ffa446cd88d
[ 4.402680] RDX: 0000000000000000 RSI: 00007ffa44865441 RDI: 0000000000000014
[ 4.402682] RBP: 0000000000020000 R08: 0000000000000000 R09: 0000000000000002
[ 4.402684] R10: 0000000000000014 R11: 0000000000000246 R12: 00007ffa44865441
[ 4.402686] R13: 0000556ee8f5bbd0 R14: 0000556ee8f6f0b0 R15: 0000556ee8f688e0
[ 4.402690] </TASK>
[ 4.402695] ================================================================================