The kernel crashes in pde_subdir_find() due to RCU stall. nvidia driver is install and loaded.

Issue

• The kernel crashes in pde_subdir_find() due to RCU stall. nvidia driver is install and loaded.

[  942.185947] Kernel panic - not syncing: RCU Stall

[  942.260382] CPU: 46 PID: 138498 Comm: rmmod Kdump: loaded Tainted: P           OE    --------- -  - 4.18.0-305.25.1.el8_4.x86_64 #1
[  942.402943] Hardware name: HPE ProLiant XL675d Gen10 Plus/ProLiant XL675d Gen10 Plus, BIOS A47 02/23/2021
[  942.518252] Call Trace:
[  942.547614]  <IRQ>
[  942.571741]  dump_stack+0x5c/0x80
[  942.611588]  panic+0xe7/0x2a9
[  942.647247]  rcu_sched_clock_irq.cold.92+0x266/0x3d3
[  942.707006]  ? timekeeping_advance+0x372/0x5a0
[  942.760474]  ? tick_sched_do_timer+0x60/0x60
[  942.811844]  update_process_times+0x24/0x60
[  942.862166]  tick_sched_handle+0x22/0x60
[  942.909341]  tick_sched_timer+0x37/0x70
[  942.955474]  __hrtimer_run_queues+0x100/0x280
[  943.007893]  hrtimer_interrupt+0x100/0x220
[  943.057172]  smp_apic_timer_interrupt+0x6a/0x130
[  943.112735]  apic_timer_interrupt+0xf/0x20
[  943.162009]  </IRQ>
[  943.187182] RIP: 0010:pde_subdir_find+0x2d/0x70
[  943.241696] Code: 00 00 41 55 41 54 55 53 48 8b 9f 80 00 00 00 48 85 db 74 3d 49 89 f5 89 d5 eb 0b 74 37 48 8b 5b 08 48 85 db 74 2b 0f b6 43 22 <39> c5 72 1a 77 ed 4c 8d a3 78 ff ff ff 89 ea 4c 89 ef 4c 89 e6 e8
[  943.468107] RSP: 0018:ffffb60fb469fd58 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[  943.559307] RAX: 0000000000000004 RBX: ffff8c2c9d3ad308 RCX: 0000000000000000
[  943.645262] RDX: 000000000000000c RSI: ffff8c4d153198ab RDI: ffff8c2c9d3aeb00
[  943.731217] RBP: 000000000000000c R08: ffff8c2cbfed86d8 R09: ffff8c2cbfed8730
[  943.817173] R10: 0000000000000000 R11: ffffffffb985f308 R12: dead000000000200
[  943.903135] R13: ffff8c4d153198ab R14: ffff8c4c2f258140 R15: ffff8c4c2f258140
[  943.989097]  remove_proc_subtree+0x74/0x160
[  944.039494]  nvswitch_procfs_device_remove+0x25/0x60 [nvidia]
[  944.108776]  nvswitch_remove.cold.31+0x149/0x177 [nvidia]
[  944.173774]  pci_device_remove+0x3b/0xc0
[  944.220955]  device_release_driver_internal+0x103/0x1f0
[  944.283854]  driver_detach+0x54/0x88
[  944.326842]  bus_remove_driver+0x77/0xc9
[  944.374022]  pci_unregister_driver+0x2d/0xb0
[  944.425472]  nvswitch_exit+0x2c/0x70 [nvidia]
[  944.477964]  nv_module_exit+0x47/0x60 [nvidia]
[  944.531502]  nvidia_exit_module+0x2b/0x50 [nvidia]
[  944.589165]  __x64_sys_delete_module+0x139/0x280
[  944.644733]  do_syscall_64+0x5b/0x1a0
[  944.688766]  entry_SYSCALL_64_after_hwframe+0x65/0xca
[  944.749572] RIP: 0033:0x154fe2d9687b
[  944.792558] Code: 73 01 c3 48 8b 0d 0d f6 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d dd f5 2b 00 f7 d8 64 89 01 48
[  945.018969] RSP: 002b:00007ffde3c4f1f8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0
[  945.110170] RAX: ffffffffffffffda RBX: 00005562134ce7c0 RCX: 0000154fe2d9687b
[  945.196129] RDX: 000000000000000a RSI: 0000000000000800 RDI: 00005562134ce828
[  945.282085] RBP: 0000000000000000 R08: 00007ffde3c4e171 R09: 0000000000000000
[  945.368040] R10: 0000154fe2e079a0 R11: 0000000000000206 R12: 00007ffde3c4f420
[  945.454000] R13: 00007ffde3c50a53 R14: 00005562134ce2a0 R15: 00005562134ce7c0