Comment 34 for bug 1981658

Hi all,

This bug seems to be present on kernel "6.2.0-32-generic #32~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Fri Aug 18 10:40:13 UTC 2 x86_64 x86_64 x86_64 GNU/Linux"

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.3 LTS
Release: 22.04
Codename: jammy

Logs:
[lun sep 11 12:18:58 2023] BUG: kernel NULL pointer dereference, address: 000000000000002b
[lun sep 11 12:18:58 2023] #PF: supervisor read access in kernel mode
[lun sep 11 12:18:58 2023] #PF: error_code(0x0000) - not-present page
[lun sep 11 12:18:58 2023] PGD 0 P4D 0
[lun sep 11 12:18:58 2023] Oops: 0000 [#1] PREEMPT SMP PTI
[lun sep 11 12:18:58 2023] CPU: 6 PID: 118 Comm: kswapd0 Tainted: P OE 6.2.0-32-generic #32~22.04.1-Ubuntu
[lun sep 11 12:18:58 2023] Hardware name: System manufacturer System Product Name/ROG STRIX Z370-E GAMING, BIOS 3005 09/30/2021
[lun sep 11 12:18:58 2023] RIP: 0010:down_read_trylock+0x16/0x80
[lun sep 11 12:18:58 2023] Code: 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 65 ff 05 5c 69 6b 50 48 b9 07 00 00 00 00 00 00 80 <48> 8b 07 48 85 c8 75 57 48 8d 90 00 01 00 00 f0 48 0f b1 17 75 ed
[lun sep 11 12:18:58 2023] RSP: 0018:ffffb6e3405539a8 EFLAGS: 00010282
[lun sep 11 12:18:58 2023] RAX: 0000000000000000 RBX: fffff2dbdbbc1080 RCX: 8000000000000007
[lun sep 11 12:18:58 2023] RDX: 0000000000000000 RSI: ffffb6e340553a58 RDI: 000000000000002b
[lun sep 11 12:18:58 2023] RBP: ffffb6e3405539d8 R08: 0000000000000000 R09: 0000000000000000
[lun sep 11 12:18:58 2023] R10: 0000000000000000 R11: 0000000000000000 R12: ffff94f60ffade38
[lun sep 11 12:18:58 2023] R13: ffff94f60ffade39 R14: ffffb6e340553a58 R15: 000000000000002b
[lun sep 11 12:18:58 2023] FS: 0000000000000000(0000) GS:ffff94fd16b80000(0000) knlGS:0000000000000000
[lun sep 11 12:18:58 2023] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[lun sep 11 12:18:58 2023] CR2: 000000000000002b CR3: 0000000330e10003 CR4: 00000000003706e0
[lun sep 11 12:18:58 2023] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[lun sep 11 12:18:58 2023] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[lun sep 11 12:18:58 2023] Call Trace:
[lun sep 11 12:18:58 2023] <TASK>
[lun sep 11 12:18:58 2023] ? show_regs+0x72/0x90
[lun sep 11 12:18:58 2023] ? __die+0x25/0x80
[lun sep 11 12:18:58 2023] ? page_fault_oops+0x79/0x190
[lun sep 11 12:18:58 2023] ? blk_mq_get_new_requests+0xf6/0x1a0
[lun sep 11 12:18:58 2023] ? do_user_addr_fault+0x30c/0x640
[lun sep 11 12:18:58 2023] ? exc_page_fault+0x81/0x1b0
[lun sep 11 12:18:58 2023] ? asm_exc_page_fault+0x27/0x30
[lun sep 11 12:18:58 2023] ? down_read_trylock+0x16/0x80
[lun sep 11 12:18:58 2023] ? folio_lock_anon_vma_read+0x76/0x190
[lun sep 11 12:18:58 2023] rmap_walk_anon+0x262/0x350
[lun sep 11 12:18:58 2023] folio_referenced+0x17d/0x240
[lun sep 11 12:18:58 2023] ? __pfx_folio_referenced_one+0x10/0x10
[lun sep 11 12:18:58 2023] ? __pfx_folio_lock_anon_vma_read+0x10/0x10
[lun sep 11 12:18:58 2023] shrink_folio_list+0x7ee/0xc20
[lun sep 11 12:18:58 2023] shrink_inactive_list+0x191/0x600
[lun sep 11 12:18:58 2023] ? shrink_active_list+0x2dd/0x470
[lun sep 11 12:18:58 2023] shrink_lruvec+0x2c4/0x400
[lun sep 11 12:18:58 2023] ? shrink_slab+0x112/0x120
[lun sep 11 12:18:58 2023] ? shrink_slab+0x112/0x120
[lun sep 11 12:18:58 2023] shrink_node_memcgs+0x187/0x1f0
[lun sep 11 12:18:58 2023] shrink_node+0xb9/0x330
[lun sep 11 12:18:58 2023] balance_pgdat+0x375/0x840
[lun sep 11 12:18:58 2023] kswapd+0x11a/0x1f0
[lun sep 11 12:18:58 2023] ? __pfx_kswapd+0x10/0x10
[lun sep 11 12:18:58 2023] kthread+0xeb/0x120
[lun sep 11 12:18:58 2023] ? __pfx_kthread+0x10/0x10
[lun sep 11 12:18:58 2023] ret_from_fork+0x29/0x50
[lun sep 11 12:18:58 2023] </TASK>