The kernel crashes after rcu_do_batch() due to "exception RIP: unknown or invalid address"

Issue

• The kernel crashes with the following messages:

[945551.027107] WARNING: CPU: 57 PID: 694906 at lib/radix-tree.c:591 delete_node+0x73/0x1d0
[945551.027108] Modules linked in: ...
[945551.027159] CPU: 57 PID: 694906 Comm: kworker/57:4 Kdump: loaded Tainted: P           OE    --------- -  - 4.18.0-305.72.1.el8_4.x86_64 #1
[945551.027160] Hardware name: HPE Synergy 480 Gen10/Synergy 480 Gen10 Compute Module, BIOS I42 06/01/2022
[945551.027165] Workqueue: events percpu_stats_free_rwork_fn
[945551.027167] RIP: 0010:delete_node+0x73/0x1d0
[945551.027169] Code: 18 48 85 db 75 c3 8b 45 04 a8 04 75 08 25 ff ff 7f 00 89 45 04 48 c7 45 08 00 00 00 00 48 8b 46 18 48 39 c7 0f 84 05 01 00 00 <0f> 0b 4c 89 e6 e8 03 f9 82 ff 48 85 db 75 b2 bb 01 00 00 00 89 d8
[945551.027170] RSP: 0018:ffffa36335dabe38 EFLAGS: 00010282
[945551.027170] RAX: 0000000000000000 RBX: ffff9530702df8e8 RCX: 0000000000000007
[945551.027171] RDX: 0000000000000000 RSI: ffff94dcaf7cd220 RDI: ffff94dcaf7cd238
[945551.027172] RBP: ffffffff96ceee40 R08: 0000000000000228 R09: ffff94dcaf7cd288
[945551.027173] R10: ffff94dcaf7cd220 R11: 0000000000000000 R12: ffffffff95f2f750
[945551.027173] R13: 0000000000000000 R14: ffff947b1a1a23c0 R15: ffff947db26d3508
[945551.027174] FS:  0000000000000000(0000) GS:ffff94d07fb40000(0000) knlGS:0000000000000000
[945551.027175] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[945551.027175] CR2: 000055ad01597c30 CR3: 000000b5a4e10002 CR4: 00000000007726e0
[945551.027176] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[945551.027176] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[945551.027177] PKRU: 55555554
[945551.027177] Call Trace:
[945551.027183]  radix_tree_delete_item+0x69/0xc0
[945551.027185]  mem_cgroup_id_put_many+0x37/0x50
[945551.027191]  process_one_work+0x1a7/0x360
[945551.027192]  worker_thread+0x30/0x390
[945551.027193]  ? create_worker+0x1a0/0x1a0
[945551.027196]  kthread+0x116/0x130
[945551.027197]  ? kthread_flush_work_fn+0x10/0x10
[945551.027202]  ret_from_fork+0x1f/0x40
[945551.027204] ---[ end trace 439aedfdfc9478ee ]---
[945551.039888] kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
[945551.047535] BUG: unable to handle kernel paging request at ffff94dcaf7cd238
[945551.054640] PGD c03fdfc067 P4D c03fdfc067 PUD b593e77063 PMD 8000006aef6001e3 
[945551.062014] Oops: 0011 [#1] SMP NOPTI
[945551.065795] CPU: 57 PID: 0 Comm: swapper/57 Kdump: loaded Tainted: P        W  OE    --------- -  - 4.18.0-305.72.1.el8_4.x86_64 #1
[945551.077804] Hardware name: HPE Synergy 480 Gen10/Synergy 480 Gen10 Compute Module, BIOS I42 06/01/2022
[945551.087283] RIP: 0010:0xffff94dcaf7cd238
[945551.091326] Code: 00 00 00 00 00 00 00 00 00 00 38 eb 7c af dc 94 ff ff 00 07 00 00 00 00 00 00 e8 f8 2d 70 30 95 ff ff 40 ee ce 96 ff ff ff ff <38> d2 7c af dc 94 ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[945551.110335] RSP: 0018:ffffa36319a7ced8 EFLAGS: 00010282
[945551.115687] RAX: ffff94dcaf7cd238 RBX: 000000000000000a RCX: 0000000000000010
[945551.122966] RDX: ffff94dcaf7cd238 RSI: 0000000000000000 RDI: ffff94dcaf7cd238
[945551.130244] RBP: 0000000000000000 R08: 0000000000000010 R09: 0000000000000100
[945551.137518] R10: ffff94d07fb69f40 R11: 0000000000000001 R12: 0000000000000000
[945551.144796] R13: ffff94d07fb6ad00 R14: ffffffff957602bf R15: ffff94d07fb6ad50
[945551.152074] FS:  0000000000000000(0000) GS:ffff94d07fb40000(0000) knlGS:0000000000000000
[945551.160311] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[945551.166187] CR2: ffff94dcaf7cd238 CR3: 000000b5a4e10002 CR4: 00000000007726e0
[945551.173464] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[945551.180740] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[945551.188016] PKRU: 55555554
[945551.190831] Call Trace:
[945551.193383]  <IRQ>
[945551.195504]  ? rcu_do_batch+0x1a4/0x3d0
[945551.199456]  ? rcu_core+0x18f/0x2f0
[945551.203065]  ? __do_softirq+0xd7/0x2d6
[945551.206930]  ? irq_exit+0xf7/0x100
[945551.210445]  ? smp_apic_timer_interrupt+0x74/0x130
[945551.215362]  ? apic_timer_interrupt+0xf/0x20
[945551.219751]  </IRQ>
[945551.221958]  ? cpuidle_enter_state+0xd9/0x3c0
[945551.226433]  ? cpuidle_enter_state+0xb4/0x3c0
[945551.230910]  ? cpuidle_enter+0x2c/0x40
[945551.234776]  ? do_idle+0x234/0x260
[945551.238291]  ? cpu_startup_entry+0x6f/0x80
[945551.242509]  ? start_secondary+0x198/0x1e0
[945551.246725]  ? secondary_startup_64_no_verify+0xc2/0xcb
[945551.252077] Modules linked in: ...
[945551.375118] CR2: ffff94dcaf7cd238