 worker_thread+0xa47/0xfb0
 kthread+0x38b/0x480
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
------------[ cut here ]------------
kernel BUG at mm/filemap.c:859!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 5643 Comm: syz.4.5261 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__filemap_add_folio+0x128c/0x1400
Code: ff 4c 89 f7 48 c7 c6 40 02 19 8c e8 be dc 1f ff 90 0f 0b e8 66 73 bf ff 48 8b 7c 24 20 48 c7 c6 00 f7 18 8c e8 a5 dc 1f ff 90 <0f> 0b e8 4d 73 bf ff 4c 89 f7 48 c7 c6 40 02 19 8c e8 8e dc 1f ff
RSP: 0018:ffffc900039975a0 EFLAGS: 00010246
RAX: ad6f279d81ca2e00 RBX: 0000000000000000 RCX: ffffffff9a9de501
RDX: 0000000000000001 RSI: ffffffff8e474924 RDI: 00000000ffffffff
RBP: ffffc90003997738 R08: ffffffff907a197f R09: 1ffffffff20f432f
R10: dffffc0000000000 R11: fffffbfff20f4330 R12: dffffc0000000000
R13: ffff88816c4108c0 R14: 0000000000000003 R15: ffff88816c4109d8
FS:  00007fd4712986c0(0000) GS:ffff88818d6d6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0334510440 CR3: 0000000112344000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 filemap_add_folio+0x251/0x4e0
 page_cache_ra_order+0x6d1/0xee0
 do_sync_mmap_readahead+0x75e/0x990
 filemap_fault+0x7d9/0x13b0
 __do_fault+0x138/0x2a0
 do_pte_missing+0x2215/0x34b0
 handle_mm_fault+0x1a53/0x3750
 do_user_addr_fault+0x746/0x1340
 exc_page_fault+0x6a/0xc0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7fd470389540
Code: 66 0f ef c0 66 0f ef c9 66 0f ef d2 66 0f ef db 48 89 f8 48 89 f9 48 81 e1 ff 0f 00 00 48 81 f9 cf 0f 00 00 77 74 48 83 e0 f0 <66> 0f 74 00 66 0f 74 48 10 66 0f 74 50 20 66 0f 74 58 30 66 0f d7
RSP: 002b:00007fd471296f48 EFLAGS: 00010206
RAX: 0000200000002000 RBX: 00007fd471297014 RCX: 0000000000000000
RDX: 0000200000002000 RSI: 000020000000200f RDI: 0000200000002000
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000002000 R11: 000020000000200f R12: 0000200000002000
R13: 00007fd471296fb0 R14: 00007fd470626270 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__filemap_add_folio+0x128c/0x1400
Code: ff 4c 89 f7 48 c7 c6 40 02 19 8c e8 be dc 1f ff 90 0f 0b e8 66 73 bf ff 48 8b 7c 24 20 48 c7 c6 00 f7 18 8c e8 a5 dc 1f ff 90 <0f> 0b e8 4d 73 bf ff 4c 89 f7 48 c7 c6 40 02 19 8c e8 8e dc 1f ff
RSP: 0018:ffffc900039975a0 EFLAGS: 00010246
RAX: ad6f279d81ca2e00 RBX: 0000000000000000 RCX: ffffffff9a9de501
RDX: 0000000000000001 RSI: ffffffff8e474924 RDI: 00000000ffffffff
RBP: ffffc90003997738 R08: ffffffff907a197f R09: 1ffffffff20f432f
R10: dffffc0000000000 R11: fffffbfff20f4330 R12: dffffc0000000000
R13: ffff88816c4108c0 R14: 0000000000000003 R15: ffff88816c4109d8
FS:  00007fd4712986c0(0000) GS:ffff88818d6d6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555799287e0 CR3: 0000000112344000 CR4: 00000000000006f0
