smpboot_thread_fn+0x3d3/0xaa0 kernel/smpboot.c:160
 kthread+0x370/0x450 kernel/kthread.c:467
 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
------------[ cut here ]------------
kernel BUG at mm/filemap.c:858!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 18539 Comm: syz.8.3532 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:__filemap_add_folio+0xfcf/0x1280 mm/filemap.c:858
Code: 56 c5 ff 48 c7 c6 00 30 bd 8b 4c 89 ef e8 b9 3f 12 00 90 0f 0b e8 31 56 c5 ff 48 c7 c6 60 30 bd 8b 4c 89 ef e8 a2 3f 12 00 90 <0f> 0b e8 1a 56 c5 ff 90 0f 0b 90 e9 4b fe ff ff e8 0c 56 c5 ff 90
RSP: 0018:ffffc90004ca7820 EFLAGS: 00010287
RAX: 000000000003a4c0 RBX: 0000000000112cc0 RCX: ffffc9000d253000
RDX: 0000000000080000 RSI: ffffffff82558608 RDI: ffff88803c200484
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002
R13: ffffea00013be000 R14: 0000000000000000 R15: 1ffff92000994f2e
FS:  00007f984d6906c0(0000) GS:ffff8880d6348000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c436934 CR3: 0000000039c46000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 filemap_add_folio+0x1d8/0x690 mm/filemap.c:966
 ra_alloc_folio mm/readahead.c:456 [inline]
 page_cache_ra_order+0x614/0xf30 mm/readahead.c:515
 do_sync_mmap_readahead mm/filemap.c:3400 [inline]
 filemap_fault+0x191a/0x2eb0 mm/filemap.c:3549
 __do_fault+0x10d/0x550 mm/memory.c:5363
 do_shared_fault mm/memory.c:5862 [inline]
 do_fault+0x2db/0x1950 mm/memory.c:5936
 do_pte_missing mm/memory.c:4477 [inline]
 handle_pte_fault mm/memory.c:6316 [inline]
 __handle_mm_fault+0x180f/0x2b60 mm/memory.c:6454
 handle_mm_fault+0x36d/0xa20 mm/memory.c:6623
 do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334
 handle_page_fault arch/x86/mm/fault.c:1474 [inline]
 exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f984c651a26
Code: a9 14 00 8b 75 00 ba 03 00 00 00 45 89 e0 49 89 45 00 41 b9 00 00 00 10 b9 01 80 00 00 31 ff c1 e6 06 e8 4d a9 14 00 8b 55 40 <49> 89 07 49 03 55 00 45 85 f6 74 1b 44 89 f3 31 c0 66 0f 1f 84 00
RSP: 002b:00007f984d68ffc0 EFLAGS: 00010207
RAX: 00007f984a8f7000 RBX: 00007f984ca15fa0 RCX: 00007f984c79c392
RDX: 0000000000080040 RSI: 0000000000100000 RDI: 0000000000000000
RBP: 0000200000010400 R08: 0000000000000004 R09: 0000000010000000
R10: 0000000000008001 R11: 0000000000000246 R12: 0000000000000004
R13: 0000200000010080 R14: 0000000000003685 R15: 0000200000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__filemap_add_folio+0xfcf/0x1280 mm/filemap.c:858
Code: 56 c5 ff 48 c7 c6 00 30 bd 8b 4c 89 ef e8 b9 3f 12 00 90 0f 0b e8 31 56 c5 ff 48 c7 c6 60 30 bd 8b 4c 89 ef e8 a2 3f 12 00 90 <0f> 0b e8 1a 56 c5 ff 90 0f 0b 90 e9 4b fe ff ff e8 0c 56 c5 ff 90
RSP: 0018:ffffc90004ca7820 EFLAGS: 00010287
RAX: 000000000003a4c0 RBX: 0000000000112cc0 RCX: ffffc9000d253000
RDX: 0000000000080000 RSI: ffffffff82558608 RDI: ffff88803c200484
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002
R13: ffffea00013be000 R14: 0000000000000000 R15: 1ffff92000994f2e
FS:  00007f984d6906c0(0000) GS:ffff8880d6348000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c436934 CR3: 0000000039c46000 CR4: 0000000000352ef0