[14528.718656] cgroup: fork rejected by pids controller in /user.slice/user-5272.slice/session-c6.scope
[14639.665745] general protection fault, probably for non-canonical address 0xdead000000000100: 0000 [#1] SMP NOPTI
[14639.675917] CPU: 15 PID: 23094 Comm: pvpython Kdump: loaded Not tainted 5.9.0-rc4.mx64.343 #1
[14639.684431] Hardware name: Dell Inc. OptiPlex 5080/032W55, BIOS 1.1.7 08/17/2020
[14639.691823] RIP: 0010:free_block+0xdc/0x1f0
[14639.696006] Code: 00 48 01 d0 48 c1 e8 0c 48 c1 e0 06 4c 01 e8 48 8b 50 08 48 8d 4a ff 83 e2 01 48 0f 45 c1 48 8b 48 08 48 8b 50 10 4c 8d 78 08 <48> 89 51 08 48 89 0a 4c 89 da 48 2b 50 28 4c 89 60 08 48 89 68 10
[14639.714747] RSP: 0018:ffffc9001c26fab8 EFLAGS: 00010046
[14639.719970] RAX: ffffea000d193600 RBX: 0000000080000000 RCX: dead000000000100
[14639.727099] RDX: dead000000000122 RSI: ffff88842d5f3ef0 RDI: ffff88842b440300
[14639.734225] RBP: dead000000000122 R08: ffffc9001c26fb30 R09: ffff88842b441280
[14639.741351] R10: 000000000000000f R11: ffff8883464d80c0 R12: dead000000000100
[14639.748477] R13: ffffea0000000000 R14: ffff88842d5f3ff0 R15: ffffea000d193608
[14639.755604] FS:  00007fd3b7e8f040(0000) GS:ffff88842d5c0000(0000) knlGS:0000000000000000
[14639.763692] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[14639.769430] CR2: 00007fd344233548 CR3: 00000002f46aa003 CR4: 00000000007706e0
[14639.776556] PKRU: 55555554
[14639.779265] Call Trace:
[14639.781717]  ___cache_free+0x2f0/0x490
[14639.785463]  kfree+0x90/0x120
[14639.788432]  kmem_freepages+0xa5/0xf0
[14639.792093]  slab_destroy+0x19/0x50
[14639.795579]  slabs_destroy+0x55/0x80
[14639.799152]  ___cache_free+0x30b/0x490
[14639.802902]  ? _cond_resched+0x15/0x40
[14639.806650]  kfree+0x90/0x120
[14639.809644]  amdgpu_vram_mgr_del+0xc1/0xe0 [amdgpu]
[14639.814524]  ttm_bo_cleanup_memtype_use+0x7a/0xa0 [ttm]
[14639.819748]  ttm_bo_put+0x1c0/0x3a0 [ttm]
[14639.823768]  amdgpu_bo_unref+0x1a/0x30 [amdgpu]
[14639.828313]  amdgpu_vm_free_table+0x5b/0x70 [amdgpu]
[14639.833293]  amdgpu_vm_free_pts+0x7c/0xf0 [amdgpu]
[14639.838097]  amdgpu_vm_fini+0x1ea/0x450 [amdgpu]
[14639.842727]  amdgpu_driver_postclose_kms+0xde/0x240 [amdgpu]
[14639.848387]  drm_file_free.part.9+0x25e/0x2b0 [drm]
[14639.853263]  drm_release+0x65/0xe0 [drm]
[14639.857183]  __fput+0x93/0x240
[14639.860238]  task_work_run+0x6c/0xa0
[14639.863811]  exit_to_user_mode_prepare+0x145/0x150
[14639.868602]  syscall_exit_to_user_mode+0x26/0x170
[14639.873304]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[14639.878353] RIP: 0033:0x7fd3d715cb5f
[14639.881925] Code: 20 00 f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 53 89 fb 48 83 ec 10 e8 bc fb ff ff 89 df 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 15 89 d7 89 44 24 0c e8 fe fb ff ff 8b 44 24
[14639.900667] RSP: 002b:00007fff07ed2f40 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[14639.908229] RAX: 0000000000000000 RBX: 0000000000000008 RCX: 00007fd3d715cb5f
[14639.915354] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000008
[14639.922480] RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000000e
[14639.929607] R10: 000000000000000c R11: 0000000000000293 R12: 0000000005168450
[14639.936732] R13: 0000000000000008 R14: 00000000007c8290 R15: 00007fff07ed31c0
[14639.943859] Modules linked in: rpcsec_gss_krb5 nfsv4 nfs 8021q garp stp mrp llc snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio i915 amdgpu gpu_sched ttm input_leds x86_pkg_temp_thermal iosf_mbi led_class drm_kms_helper kvm_intel snd_hda_codec_hdmi drm snd_hda_intel intel_gtt snd_intel_dspcfg kvm fb_sys_fops syscopyarea snd_hda_codec snd_hda_core sysfillrect wmi_bmof sysimgblt snd_pcm irqbypass wmi snd_timer snd deflate iTCO_wdt soundcore iTCO_vendor_support crc32c_intel efi_pstore video pstore nfsd auth_rpcgss nfs_acl lockd grace sunrpc efivarfs ip_tables x_tables unix ipv6 autofs4
[14639.996237] ---[ end trace c4d9d5f7e4b117a6 ]---
[14640.705681] RIP: 0010:free_block+0xdc/0x1f0
[14640.709874] Code: 00 48 01 d0 48 c1 e8 0c 48 c1 e0 06 4c 01 e8 48 8b 50 08 48 8d 4a ff 83 e2 01 48 0f 45 c1 48 8b 48 08 48 8b 50 10 4c 8d 78 08 <48> 89 51 08 48 89 0a 4c 89 da 48 2b 50 28 4c 89 60 08 48 89 68 10
[14640.728612] RSP: 0018:ffffc9001c26fab8 EFLAGS: 00010046
[14640.733834] RAX: ffffea000d193600 RBX: 0000000080000000 RCX: dead000000000100
[14640.740962] RDX: dead000000000122 RSI: ffff88842d5f3ef0 RDI: ffff88842b440300
[14640.748092] RBP: dead000000000122 R08: ffffc9001c26fb30 R09: ffff88842b441280
[14640.755218] R10: 000000000000000f R11: ffff8883464d80c0 R12: dead000000000100
[14640.762348] R13: ffffea0000000000 R14: ffff88842d5f3ff0 R15: ffffea000d193608
[14640.769478] FS:  00007fd3b7e8f040(0000) GS:ffff88842d5c0000(0000) knlGS:0000000000000000
[14640.777558] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[14640.783327] CR2: 00007fd344233548 CR3: 00000002f46aa003 CR4: 00000000007706e0
[14640.790476] PKRU: 55555554
[14661.818409] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[14661.824340] rcu:     6-...0: (1 GPs behind) idle=83a/1/0x4000000000000000 softirq=545426/545427 fqs=1448
[14661.833636]  (detected by 10, t=21025 jiffies, g=3736877, q=2158)
[14661.839726] Task dump for CPU 6:
[14661.842952] task:kworker/6:2     state:R  running task     stack:    0 pid: 7383 ppid:     2 flags:0x00004008
[14661.852856] Workqueue: events cache_reap
[14661.856779] Call Trace:
[14661.859230]  ? cache_reap+0xc2/0x200
[14661.862804]  ? process_one_work+0x1e5/0x420
[14661.866987]  ? cancel_delayed_work+0x90/0x90
[14661.871254]  ? worker_thread+0x2d/0x3b0
[14661.875087]  ? cancel_delayed_work+0x90/0x90
[14661.879354]  ? kthread+0x118/0x130
[14661.882756]  ? kthread_use_mm+0xe0/0xe0
[14661.886589]  ? ret_from_fork+0x1f/0x30
[14726.905632] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[14726.911561] rcu:     6-...0: (1 GPs behind) idle=83a/1/0x4000000000000000 softirq=545426/545427 fqs=1735
[14726.920856]  (detected by 10, t=86112 jiffies, g=3736877, q=3398)
[14726.926946] Task dump for CPU 6:
[14726.930172] task:kworker/6:2     state:R  running task     stack:    0 pid: 7383 ppid:     2 flags:0x00004008
[14726.940076] Workqueue: events cache_reap
[14726.943994] Call Trace:
[14726.946445]  ? cache_reap+0xc2/0x200
[14726.950019]  ? process_one_work+0x1e5/0x420
[14726.954203]  ? cancel_delayed_work+0x90/0x90
[14726.958470]  ? worker_thread+0x2d/0x3b0
[14726.962307]  ? cancel_delayed_work+0x90/0x90
[14726.966575]  ? kthread+0x118/0x130
[14726.969976]  ? kthread_use_mm+0xe0/0xe0
[14726.973809]  ? ret_from_fork+0x1f/0x30