[Bug 204805] New: BUG: kernel NULL pointer dereference, address: 0000000000000200

[Bug 204805] New: BUG: kernel NULL pointer dereference, address: 0000000000000200

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=204805

            Bug ID: 204805
           Summary: BUG: kernel NULL pointer dereference, address:
                    0000000000000200
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.2.12
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: ilkka.prusi@gmail.com
        Regression: No

Created attachment 284909
  --> https://bugzilla.kernel.org/attachment.cgi?id=284909&action=edit
kern.log

A bug that looks like caused by amdgpu_drm.

Hard lockup of system as-in not responding to any inputs, after forced reset
the attached bug information in kern.log

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[Bug 204805] BUG: kernel NULL pointer dereference, address: 0000000000000200

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=204805

--- Comment #1 from ilkka.prusi@gmail.com ---
Having something such as "make -j 20" of kernel sources while using a browser
in GPU-accelerated mode seems to contribute to this. Repeats on 5.2.14 as well
but logs don't show anything useful for some reason.

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[Bug 204805] BUG: kernel NULL pointer dereference, address: 0000000000000200

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=204805

--- Comment #2 from ilkka.prusi@gmail.com ---
System freezing repeated on 5.3.6 (Debian/testing bullseye).

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[Bug 204805] BUG: kernel NULL pointer dereference, address: 0000000000000200

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=204805

--- Comment #3 from ilkka.prusi@gmail.com ---
SysRq tricks do not work when freezing: Alt + SysRq + b does not reboot.

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[Bug 204805] BUG: kernel NULL pointer dereference, address: 0000000000000200

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=204805

--- Comment #4 from ilkka.prusi@gmail.com ---
With 5.3.7 system is not locking up although KASAN reports error in amdgpu:
[   31.792441]
==================================================================
[   31.792718] BUG: KASAN: global-out-of-bounds in
read_indirect_azalia_reg+0x69/0x100 [amdgpu]
[   31.792786] Read of size 4 at addr ffffffffc15b69e8 by task
systemd-udevd/425

[   31.792865] CPU: 15 PID: 425 Comm: systemd-udevd Tainted: G            E    
5.3.7 #1
[   31.792870] Hardware name: System manufacturer System Product Name/TUF
B450-PLUS GAMING, BIOS 1804 07/29/2019
[   31.792874] Call Trace:
[   31.792884]  dump_stack+0x9a/0xf0
[   31.792896]  print_address_description+0x67/0x323
[   31.793069]  ? read_indirect_azalia_reg+0x69/0x100 [amdgpu]
[   31.793240]  ? read_indirect_azalia_reg+0x69/0x100 [amdgpu]
[   31.793249]  __kasan_report.cold+0x1a/0x3d
[   31.793260]  ? memcpy+0x40/0x50
[   31.793431]  ? read_indirect_azalia_reg+0x69/0x100 [amdgpu]
[   31.793444]  kasan_report+0xe/0x12
[   31.793616]  read_indirect_azalia_reg+0x69/0x100 [amdgpu]
[   31.793797]  dce_aud_endpoint_valid+0xf/0x20 [amdgpu]
[   31.793973]  resource_construct+0x24d/0x550 [amdgpu]
[   31.794157]  ? dc_destroy_resource_pool+0x70/0x70 [amdgpu]
[   31.794168]  ? kasan_unpoison_shadow+0x33/0x40
[   31.794357]  dce120_create_resource_pool+0x911/0xb10 [amdgpu]
[   31.794544]  ? dce120_i2c_hw_create+0x80/0x80 [amdgpu]
[   31.794554]  ? mark_held_locks+0x3e/0xa0
[   31.794562]  ? _raw_write_unlock_irqrestore+0x4b/0x60
[   31.794570]  ? match_held_lock+0x2e/0x240
[   31.794749]  dc_create_resource_pool+0x1c3/0x300 [amdgpu]
[   31.794921]  ? resource_parse_asic_id+0x1e0/0x1e0 [amdgpu]
[   31.794930]  ? kasan_unpoison_shadow+0x33/0x40
[   31.794938]  ? __kasan_kmalloc.constprop.0+0xc2/0xd0
[   31.795120]  ? dal_gpio_service_create+0x10c/0x130 [amdgpu]
[   31.795299]  dc_create+0x46b/0xbd0 [amdgpu]
[   31.795308]  ? mark_lock+0xb1/0x9f0
[   31.795486]  ? destruct+0x280/0x280 [amdgpu]
[   31.795496]  ? mark_held_locks+0x3e/0xa0
[   31.795506]  ? match_held_lock+0x2e/0x240
[   31.795512]  ? lockdep_hardirqs_on+0x19a/0x290
[   31.795533]  ? kasan_unpoison_shadow+0x33/0x40
[   31.795542]  ? __kasan_kmalloc.constprop.0+0xc2/0xd0
[   31.795725]  amdgpu_dm_init+0x25e/0x320 [amdgpu]
[   31.795740]  ? rcu_read_lock_sched_held+0x9d/0xb0
[   31.795892]  ? amdgpu_mm_rreg+0x204/0x230 [amdgpu]
[   31.796071]  ? dm_resume+0x5d0/0x5d0 [amdgpu]
[   31.796246]  ? vega10_enable_fan_control_feature+0x75/0x90 [amdgpu]
[   31.796418]  ? vega10_fan_ctrl_start_smc_fan_control+0x26/0x40 [amdgpu]
[   31.796587]  ? vega10_start_thermal_controller+0x30c/0x320 [amdgpu]
[   31.796622]  ? memcpy+0x35/0x50
[   31.796793]  ? psm_set_states+0x90/0xb0 [amdgpu]
[   31.796980]  dm_hw_init+0xe/0x20 [amdgpu]
[   31.797150]  amdgpu_device_init.cold+0x23ea/0x2657 [amdgpu]
[   31.797318]  ? amdgpu_device_has_dc_support+0x30/0x30 [amdgpu]
[   31.797327]  ? mark_held_locks+0x3e/0xa0
[   31.797334]  ? _raw_write_unlock_irqrestore+0x4b/0x60
[   31.797343]  ? lockdep_hardirqs_on+0x19a/0x290
[   31.797352]  ? match_held_lock+0x2e/0x240
[   31.797523]  ? amdgpu_driver_load_kms+0xc2/0x3a0 [amdgpu]
[   31.797529]  ? rcu_read_lock_sched_held+0x9d/0xb0
[   31.797690]  amdgpu_driver_load_kms+0x11b/0x3a0 [amdgpu]
[   31.797848]  ? amdgpu_register_gpu_instance+0xd0/0xd0 [amdgpu]
[   31.797859]  ? __kasan_slab_free+0x141/0x170
[   31.797905]  drm_dev_register+0x1d8/0x220 [drm]
[   31.798077]  amdgpu_pci_probe+0xf7/0x160 [amdgpu]
[   31.798235]  ? amdgpu_pmops_runtime_idle+0xe0/0xe0 [amdgpu]
[   31.798244]  local_pci_probe+0x74/0xc0
[   31.798259]  pci_device_probe+0x1ee/0x2f0
[   31.798267]  ? pci_device_remove+0x1a0/0x1a0
[   31.798285]  ? sysfs_do_create_link_sd.isra.0+0x74/0xc0
[   31.798306]  really_probe+0x184/0x500
[   31.798323]  driver_probe_device+0x7e/0x130
[   31.798336]  device_driver_attach+0x87/0x90
[   31.798346]  ? device_driver_attach+0x90/0x90
[   31.798351]  __driver_attach+0xb0/0x1a0
[   31.798363]  ? device_driver_attach+0x90/0x90
[   31.798368]  bus_for_each_dev+0xe9/0x140
[   31.798377]  ? subsys_dev_iter_exit+0x10/0x10
[   31.798387]  ? __list_add_valid+0x2f/0x60
[   31.798408]  bus_add_driver+0x226/0x2e0
[   31.798424]  driver_register+0xd8/0x150
[   31.798432]  ? 0xffffffffc0e48000
[   31.798443]  do_one_initcall+0xbd/0x3e4
[   31.798451]  ? perf_trace_initcall_level+0x250/0x250
[   31.798461]  ? check_flags.part.0+0x82/0x210
[   31.798478]  ? kasan_unpoison_shadow+0x33/0x40
[   31.798485]  ? kasan_unpoison_shadow+0x33/0x40
[   31.798503]  do_init_module+0xfd/0x390
[   31.798519]  load_module+0x3f40/0x4290
[   31.798584]  ? module_frob_arch_sections+0x20/0x20
[   31.798598]  ? kernel_read+0x9b/0xc0
[   31.798613]  ? kernel_read_file+0x187/0x330
[   31.798627]  ? free_bprm+0xe0/0xe0
[   31.798635]  ? __seccomp_filter+0x127/0x990
[   31.798672]  ? __do_sys_finit_module+0x121/0x1b0
[   31.798677]  __do_sys_finit_module+0x121/0x1b0
[   31.798686]  ? __ia32_sys_init_module+0x40/0x40
[   31.798699]  ? vma_is_stack_for_current+0x60/0x60
[   31.798740]  ? trace_hardirqs_on_thunk+0x1a/0x20
[   31.798751]  ? mark_held_locks+0x23/0xa0
[   31.798767]  do_syscall_64+0x78/0x260
[   31.798777]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   31.798783] RIP: 0033:0x7fee910ef0c9
[   31.798790] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 97 3d 0c 00 f7 d8 64 89 01 48
[   31.798795] RSP: 002b:00007ffc15cfb518 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
[   31.798802] RAX: ffffffffffffffda RBX: 000055da850b2b90 RCX:
00007fee910ef0c9
[   31.798807] RDX: 0000000000000000 RSI: 00007fee90ff2cad RDI:
0000000000000013
[   31.798812] RBP: 0000000000020000 R08: 0000000000000000 R09:
000055da8509f568
[   31.798816] R10: 0000000000000013 R11: 0000000000000246 R12:
00007fee90ff2cad
[   31.798821] R13: 0000000000000000 R14: 000055da850a23e0 R15:
000055da850b2b90

[   31.798873] The buggy address belongs to the variable:
[   31.799074]  audio_regs+0x108/0xfffffffffff00720 [amdgpu]

[   31.799138] Memory state around the buggy address:
[   31.799181]  ffffffffc15b6880: fa fa fa fa 00 00 04 fa fa fa fa fa 00 00 00
00
[   31.799242]  ffffffffc15b6900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00
[   31.799302] >ffffffffc15b6980: 00 00 00 00 00 00 00 00 00 00 00 00 00 fa fa
fa
[   31.799361]                                                           ^
[   31.799416]  ffffffffc15b6a00: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00
00
[   31.799476]  ffffffffc15b6a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
fa
[   31.799536]
==================================================================

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[Bug 204805] BUG: kernel NULL pointer dereference, address: 0000000000000200

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=204805

ilkka.prusi@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |UNREPRODUCIBLE

--- Comment #5 from ilkka.prusi@gmail.com ---
Splitting KASAN-reported bug to another one.

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[Bug 204805] BUG: kernel NULL pointer dereference, address: 0000000000000200

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=204805

--- Comment #6 from ilkka.prusi@gmail.com ---
Again, seems to be fixed by this commit:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c0fdf3302cb4f186c871684eac5c407a107e480

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