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* oops/null pointer in 0010:dma_fence_is_signaled+0x12/0x60 [amdgpu]
@ 2026-03-16  0:57 Dr. David Alan Gilbert
  2026-03-16  8:22 ` Christian König
  0 siblings, 1 reply; 5+ messages in thread
From: Dr. David Alan Gilbert @ 2026-03-16  0:57 UTC (permalink / raw)
  To: alexander.deucher, christian.koenig, amd-gfx

Hi,
  I'm not sure if this is repeatable, but I landed with a null
pointer during a GPU reset, so thought I should probably
report it:
   6.19.7-300.fc44.x86_64
Mar 16 00:24:39 dalek kernel: BUG: kernel NULL pointer dereference, address: 0000000000000018
Mar 16 00:24:39 dalek kernel: #PF: supervisor read access in kernel mode
....
Mar 16 00:24:39 dalek kernel: Workqueue: amdgpu-reset-dev drm_sched_job_timedout [gpu_sched]
Mar 16 00:24:39 dalek kernel: RIP: 0010:dma_fence_is_signaled+0x12/0x60 [amdgpu]

see full oops below;

09:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Lexa PRO [Radeon 540/540X/550/550X / RX 540X/550/550X] (rev c7)
AMD Ryzen 9 3950X

I suspect the timeout was real, and caused by a runaway llama, I forgot the
flag to stop it trying to use the GPU for image encoding; but the null page
seems unfortunate.  Impressively the audio still kept playing via it:

I have the devcoredump copied if it's of interest
(Note for self: ~/amd.core-2026-03-16)

Dave


Mar 16 00:24:28 dalek kernel: amdgpu 0000:09:00.0: amdgpu: Dumping IP State
Mar 16 00:24:28 dalek kernel: amdgpu 0000:09:00.0: amdgpu: Dumping IP State Completed
Mar 16 00:24:28 dalek kernel: amdgpu 0000:09:00.0: amdgpu: [drm] AMDGPU device coredump file has been created
Mar 16 00:24:28 dalek kernel: amdgpu 0000:09:00.0: amdgpu: [drm] Check your /sys/class/drm/card1/device/devcoredump/data
Mar 16 00:24:28 dalek kernel: amdgpu 0000:09:00.0: amdgpu: ring gfx timeout, signaled seq=1705630, emitted seq=1705633
Mar 16 00:24:28 dalek kernel: amdgpu 0000:09:00.0: amdgpu:  Process llama-mtmd-cli pid 299886 thread llama-mtmd-cli pid 299886
Mar 16 00:24:28 dalek kernel: amdgpu 0000:09:00.0: amdgpu: GPU reset begin!. Source:  1
Mar 16 00:24:32 dalek kernel: amdgpu 0000:09:00.0: amdgpu: failed to suspend display audio
Mar 16 00:24:32 dalek kernel: amdgpu 0000:09:00.0: amdgpu: Guilty job already signaled, skipping HW reset
Mar 16 00:24:32 dalek kernel: amdgpu 0000:09:00.0: amdgpu: GPU reset(1) succeeded!
Mar 16 00:24:32 dalek kernel: amdgpu 0000:09:00.0: [drm] device wedged, but recovered through reset
Mar 16 00:24:34 dalek lightdm[40555]: ATTENTION: default value of option mesa_glthread overridden by environment.
Mar 16 00:24:34 dalek kernel: amdgpu 0000:09:00.0: amdgpu: Dumping IP State
Mar 16 00:24:34 dalek kernel: amdgpu 0000:09:00.0: amdgpu: Dumping IP State Completed
Mar 16 00:24:34 dalek kernel: amdgpu 0000:09:00.0: amdgpu: [drm] AMDGPU device coredump file has been created
Mar 16 00:24:34 dalek kernel: amdgpu 0000:09:00.0: amdgpu: [drm] Check your /sys/class/drm/card1/device/devcoredump/data
Mar 16 00:24:34 dalek kernel: amdgpu 0000:09:00.0: amdgpu: ring gfx timeout, signaled seq=1705632, emitted seq=1705637
Mar 16 00:24:34 dalek kernel: amdgpu 0000:09:00.0: amdgpu: GPU reset begin!. Source:  1
Mar 16 00:24:38 dalek kernel: amdgpu 0000:09:00.0: amdgpu: failed to suspend display audio
Mar 16 00:24:39 dalek kernel: BUG: kernel NULL pointer dereference, address: 0000000000000018
Mar 16 00:24:39 dalek kernel: #PF: supervisor read access in kernel mode
Mar 16 00:24:39 dalek kernel: #PF: error_code(0x0000) - not-present page
Mar 16 00:24:39 dalek kernel: PGD 849708067 P4D 849708067 PUD 15d277067 PMD 0 
Mar 16 00:24:39 dalek kernel: Oops: Oops: 0000 [#1] SMP NOPTI
Mar 16 00:24:39 dalek kernel: CPU: 7 UID: 0 PID: 298062 Comm: kworker/u128:2 Not tainted 6.19.7-300.fc44.x86_64 #1 PREEMPT(lazy) 
Mar 16 00:24:39 dalek kernel: Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./X570 Pro4, BIOS P3.10 07/13/2020
Mar 16 00:24:39 dalek kernel: Workqueue: amdgpu-reset-dev drm_sched_job_timedout [gpu_sched]
Mar 16 00:24:39 dalek kernel: RIP: 0010:dma_fence_is_signaled+0x12/0x60 [amdgpu]
Mar 16 00:24:39 dalek kernel: Code: 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 47 30 48 d1 e8 89 c2 83 e2 01 75 2c 48 8b>
Mar 16 00:24:39 dalek kernel: RSP: 0018:ffffcf349c553d20 EFLAGS: 00010246
Mar 16 00:24:39 dalek kernel: RAX: 0000000000000000 RBX: ffffcf349c553da0 RCX: 0000000000000000
Mar 16 00:24:39 dalek kernel: RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8bce4ecd4380
Mar 16 00:24:39 dalek kernel: RBP: 0000000000000000 R08: 0000000010000020 R09: ffff8bc9c0400b68
Mar 16 00:24:39 dalek kernel: R10: 0000000000000080 R11: ffffffffa16760a0 R12: ffff8bc9e9100000
Mar 16 00:24:39 dalek kernel: R13: ffff8bca7ccab200 R14: 0000000000000000 R15: 0000000000000000
Mar 16 00:24:39 dalek kernel: FS:  0000000000000000(0000) GS:ffff8bd90c066000(0000) knlGS:0000000000000000
Mar 16 00:24:39 dalek kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Mar 16 00:24:39 dalek kernel: CR2: 0000000000000018 CR3: 00000001c591f000 CR4: 0000000000350ef0
Mar 16 00:24:39 dalek kernel: Call Trace:
Mar 16 00:24:39 dalek kernel:  <TASK>
Mar 16 00:24:39 dalek kernel:  amdgpu_device_gpu_recover.cold+0x244/0x2ec [amdgpu]
Mar 16 00:24:39 dalek kernel:  amdgpu_job_timedout.cold+0x218/0x258 [amdgpu]
Mar 16 00:24:39 dalek kernel:  ? srso_return_thunk+0x5/0x5f
Mar 16 00:24:39 dalek kernel:  drm_sched_job_timedout+0x8b/0x190 [gpu_sched]
Mar 16 00:24:39 dalek kernel:  ? srso_return_thunk+0x5/0x5f
Mar 16 00:24:39 dalek kernel:  process_one_work+0x190/0x350
Mar 16 00:24:39 dalek kernel:  worker_thread+0x18d/0x2f0
Mar 16 00:24:39 dalek kernel:  ? __pfx_worker_thread+0x10/0x10
Mar 16 00:24:39 dalek kernel:  kthread+0xfa/0x240
Mar 16 00:24:39 dalek kernel:  ? finish_task_switch.isra.0+0x82/0x2a0
Mar 16 00:24:39 dalek kernel:  ? __pfx_kthread+0x10/0x10
Mar 16 00:24:39 dalek kernel:  ? __pfx_kthread+0x10/0x10
Mar 16 00:24:39 dalek kernel:  ret_from_fork+0x130/0x1a0
Mar 16 00:24:39 dalek kernel:  ? __pfx_kthread+0x10/0x10
Mar 16 00:24:39 dalek kernel:  ret_from_fork_asm+0x1a/0x30
Mar 16 00:24:39 dalek kernel:  </TASK>
Mar 16 00:24:39 dalek kernel: Modules linked in: dm_crypt snd_seq_dummy snd_hrtimer nft_masq nft_reject_ipv4 act_csum cls_u32 sch_htb nf_nat_tftp nf_conntr>
Mar 16 00:24:39 dalek kernel:  drm_panel_backlight_quirks gpu_sched drm_suballoc_helper video drm_buddy drm_display_helper nvme nvme_core cec ghash_clmulni>
Mar 16 00:24:39 dalek kernel: CR2: 0000000000000018
Mar 16 00:24:39 dalek kernel: ---[ end trace 0000000000000000 ]---
Mar 16 00:24:39 dalek kernel: RIP: 0010:dma_fence_is_signaled+0x12/0x60 [amdgpu]
Mar 16 00:24:39 dalek kernel: Code: 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 47 30 48 d1 e8 89 c2 83 e2 01 75 2c 48 8b>
Mar 16 00:24:39 dalek kernel: RSP: 0018:ffffcf349c553d20 EFLAGS: 00010246
Mar 16 00:24:39 dalek kernel: RAX: 0000000000000000 RBX: ffffcf349c553da0 RCX: 0000000000000000
Mar 16 00:24:39 dalek kernel: RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8bce4ecd4380
Mar 16 00:24:39 dalek kernel: RBP: 0000000000000000 R08: 0000000010000020 R09: ffff8bc9c0400b68
Mar 16 00:24:39 dalek kernel: R10: 0000000000000080 R11: ffffffffa16760a0 R12: ffff8bc9e9100000
Mar 16 00:24:39 dalek kernel: R13: ffff8bca7ccab200 R14: 0000000000000000 R15: 0000000000000000
Mar 16 00:24:39 dalek kernel: FS:  0000000000000000(0000) GS:ffff8bd90c066000(0000) knlGS:0000000000000000
Mar 16 00:24:39 dalek kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Mar 16 00:24:39 dalek kernel: CR2: 0000000000000018 CR3: 00000001c591f000 CR4: 0000000000350ef0
Mar 16 00:24:39 dalek kernel: note: kworker/u128:2[298062] exited with irqs disabled

-- 
 -----Open up your eyes, open up your mind, open up your code -------   
/ Dr. David Alan Gilbert    |       Running GNU/Linux       | Happy  \ 
\        dave @ treblig.org |                               | In Hex /
 \ _________________________|_____ http://www.treblig.org   |_______/

^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2026-03-17  8:18 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
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2026-03-16  0:57 oops/null pointer in 0010:dma_fence_is_signaled+0x12/0x60 [amdgpu] Dr. David Alan Gilbert
2026-03-16  8:22 ` Christian König
2026-03-16 12:34   ` Dr. David Alan Gilbert
2026-03-16 12:37     ` Christian König
2026-03-16 14:18     ` Dr. David Alan Gilbert

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