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: 3 UID: 0 PID: 6232 Comm: syz.1.112 Not tainted syzkaller #0 PREEMPT(full) 
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: 58 c5 ff 48 c7 c6 00 30 bd 8b 4c 89 ef e8 d9 3f 12 00 90 0f 0b e8 f1 57 c5 ff 48 c7 c6 60 30 bd 8b 4c 89 ef e8 c2 3f 12 00 90 <0f> 0b e8 da 57 c5 ff 90 0f 0b 90 e9 4b fe ff ff e8 cc 57 c5 ff 90
RSP: 0018:ffffc9000330f438 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000112cc0 RCX: 0000000000000000
RDX: ffff88803342c900 RSI: ffffffff825587c8 RDI: ffff88803342cd84
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 1ffff110059be9b2 R12: 0000000000000002
R13: ffffea0000880ac0 R14: 0000000000000000 R15: 1ffff92000661eb1
FS:  00005555796fd500(0000) GS:ffff8880d664a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ec63fff CR3: 00000000375ce000 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
 page_cache_sync_ra+0x6e0/0xb10 mm/readahead.c:629
 filemap_get_pages+0x6cf/0x2050 mm/filemap.c:2690
 filemap_splice_read+0x46e/0xc80 mm/filemap.c:3079
 do_splice_read fs/splice.c:980 [inline]
 do_splice_read+0x285/0x370 fs/splice.c:954
 splice_direct_to_actor+0x2a1/0xa30 fs/splice.c:1084
 do_splice_direct_actor fs/splice.c:1202 [inline]
 do_splice_direct+0x174/0x240 fs/splice.c:1228
 do_sendfile+0xadc/0xe20 fs/read_write.c:1372
 __do_sys_sendfile64 fs/read_write.c:1433 [inline]
 __se_sys_sendfile64 fs/read_write.c:1419 [inline]
 __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1419
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3037b9c629
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffaf388ff8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f3037e15fa0 RCX: 00007f3037b9c629
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 00007f3037c32b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000200000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3037e15fac R14: 00007f3037e15fa0 R15: 00007f3037e15fa0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__filemap_add_folio+0xfcf/0x1280 mm/filemap.c:858
Code: 58 c5 ff 48 c7 c6 00 30 bd 8b 4c 89 ef e8 d9 3f 12 00 90 0f 0b e8 f1 57 c5 ff 48 c7 c6 60 30 bd 8b 4c 89 ef e8 c2 3f 12 00 90 <0f> 0b e8 da 57 c5 ff 90 0f 0b 90 e9 4b fe ff ff e8 cc 57 c5 ff 90
RSP: 0018:ffffc9000330f438 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000112cc0 RCX: 0000000000000000
RDX: ffff88803342c900 RSI: ffffffff825587c8 RDI: ffff88803342cd84
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 1ffff110059be9b2 R12: 0000000000000002
R13: ffffea0000880ac0 R14: 0000000000000000 R15: 1ffff92000661eb1
FS:  00005555796fd500(0000) GS:ffff8880d664a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ec63fff CR3: 00000000375ce000 CR4: 0000000000352ef0