The server goes into a kernel panic due to NULL pointer dereference occurring in __rb_erase_color()

Issue

• The kernel suddenly crashed due to nullptr-deref with a message and a call trace like this:

[   65.072359] BUG: unable to handle kernel NULL pointer dereference at           (null)
[   65.072385] IP: [<ffffffffa2da48e7>] __rb_erase_color+0x87/0x2b0
[   65.072407] PGD 0 
[   65.072413] Oops: 0002 [#1] SMP  
[   65.072424] Modules linked in: ...
[   65.072642] CPU: 0 PID: 920 Comm: systemd-readahe Kdump: loaded Tainted: P           OE  ------------   3.10.0-1160.119.1.el7.x86_64 #1
[   65.072670] Hardware name: HPE ProLiant DL380 Gen10 Plus/ProLiant DL380 Gen10 Plus, BIOS U46 06/14/2024
[   65.072692] task: ffff8a33dcdee300 ti: ffff8a4d7b870000 task.ti: ffff8a4d7b870000
[   65.072709] RIP: 0010:[<ffffffffa2da48e7>]  [<ffffffffa2da48e7>] __rb_erase_color+0x87/0x2b0
[   65.072731] RSP: 0018:ffff8a4d7b873cd0  EFLAGS: 00010286
[   65.072744] RAX: ffff8a4d59cad721 RBX: ffff89cda858ac28 RCX: 0000000000000000
[   65.072760] RDX: ffff8a4d7b6e2b50 RSI: ffff8a4d7be85a40 RDI: ffff8a4d7b6e2b50
[   65.072776] RBP: ffff8a4d7b873cf8 R08: ffff8a4d7b6e2b50 R09: ffff8a4d7b6e2b50
[   65.072793] R10: ffff89cdbbd939a8 R11: 0000000000000000 R12: ffff8a4d59cad720
[   65.072810] R13: ffffffffa2bf4c40 R14: ffff8a4d7be85a40 R15: 0000000000000000
[   65.072826] FS:  0000000000000000(0000) GS:ffff89cdbfa00000(0000) knlGS:0000000000000000
[   65.072845] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   65.072858] CR2: 0000000000000000 CR3: 000000e49d210000 CR4: 0000000000760ff0
[   65.072875] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   65.072891] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   65.072907] PKRU: 55555554
[   65.072915] Call Trace:
[   65.072925]  [<ffffffffa2bf4f28>] vma_interval_tree_remove+0x188/0x240
[   65.072942]  [<ffffffffa2c05ad6>] __remove_shared_vm_struct+0x46/0x70
[   65.072958]  [<ffffffffa2c061b0>] unlink_file_vma+0x40/0x60
[   65.072972]  [<ffffffffa2bfc630>] free_pgtables+0xb0/0x130
[   65.072986]  [<ffffffffa2c095a6>] exit_mmap+0xc6/0x1a0
[   65.073000]  [<ffffffffa2a9c07f>] mmput+0x6f/0x100
[   65.073013]  [<ffffffffa2aa6128>] do_exit+0x288/0xa30
[   65.073027]  [<ffffffffa31bf7f8>] ? __do_page_fault+0x238/0x510
[   65.073042]  [<ffffffffa2aa694f>] do_group_exit+0x3f/0xa0
[   65.073055]  [<ffffffffa2aa69c4>] SyS_exit_group+0x14/0x20
[   65.073698]  [<ffffffffa31c539a>] system_call_fastpath+0x25/0x2a
[   65.074318] Code: e2 49 89 c4 49 8b 5c 24 08 48 39 d3 0f 84 ea 00 00 00 f6 03 01 75 ad 4c 8b 7b 10 4c 89 e0 48 83 c8 01 4d 89 7c 24 08 4c 89 63 10 <49> 89 07 49 8b 04 24 48 89 03 48 83 e0 fc 49 89 1c 24 0f 84 99
[   65.075667] RIP  [<ffffffffa2da48e7>] __rb_erase_color+0x87/0x2b0
[   65.076307]  RSP <ffff8a4d7b873cd0>
[   65.076921] CR2: 0000000000000000