40.529093] LustreError: 8376:0:(llite_lib.c:955:ll_get_default_mdsize()) Get default mdsize error rc -19
[   40.531005] BUG: kernel NULL pointer dereference, address: 0000000000000158
[   40.531007] #PF: supervisor read access in kernel mode
[   40.531007] #PF: error_code(0x0000) - not-present page
[   40.531009] PGD 1108cd067 P4D 1108cd067 PUD 1108cc067 PMD 0 
[   40.531010] Oops: 0000 [#1] SMP
[   40.531012] CPU: 3 PID: 8376 Comm: lctl Tainted: G        W  O      -------  ---  5.14.0 #17
[   40.531013] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-8.fc42 06/10/2025
[   40.531013] RIP: 0010:lu_site_stats_seq_print+0x1b/0x2b0 [obdclass]
[   40.531052] Code: 41 5c c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 41 57 41 56 41 55 41 54 55 48 89 f5 53 48 89 fb 48 81 c7 90 02 00 00 48 83 ec 48 <44> 8b a7 c8 fe ff ff 48 c7 44 24 10 00 00 00 00 48 c7 44 24 18 00
[   40.531053] RSP: 0018:ffff94ef89e9bcb8 EFLAGS: 00010296
[   40.531054] RAX: ffff94ef808b8800 RBX: 0000000000000000 RCX: 0000000000000001
[   40.531055] RDX: 0000000000001000 RSI: ffff94ef40ae8a48 RDI: 0000000000000290
[   40.531056] RBP: ffff94ef40ae8a48 R08: 0000000000400cc0 R09: 00000000ffffffff
[   40.531057] R10: ffffffff922ddb37 R11: 0000000000000000 R12: ffff94ef89e9be18
[   40.531057] R13: ffff94ef89e9bdf0 R14: ffff94ef40ae8a70 R15: 0000000000000001
[   40.531059] FS:  00007ff84c2cf940(0000) GS:ffff94f015780000(0000) knlGS:0000000000000000
[   40.531060] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   40.531061] CR2: 0000000000000158 CR3: 0000000149e9c000 CR4: 0000000000350eb0
[   40.531062] Call Trace:
[   40.531063]  <TASK>
[   40.531064]  ? __die_body.cold+0x1a/0x1f
[   40.531067]  ? page_fault_oops+0x65/0x1d0
[   40.531069]  ? exc_page_fault+0x65/0x240
[   40.531072]  ? asm_exc_page_fault+0x22/0x30
[   40.531074]  ? seq_read_iter+0x377/0x460
[   40.531076]  ? lu_site_stats_seq_print+0x1b/0x2b0 [obdclass]
[   40.531104]  ? lock_acquire+0x15c/0x2f0
[   40.531106]  ? trace_contention_end+0x29/0xc0
[   40.531108]  ? __mutex_lock+0xf2/0x9a0
[   40.531110]  ? __is_insn_slot_addr+0x91/0x130
[   40.531112]  cl_site_stats_print+0x15/0x180 [obdclass]
[   40.531140]  ? __kmalloc_node+0x15d/0x2b0
[   40.531142]  ? seq_read_iter+0x377/0x460