------------[ cut here ]------------
WARNING: mm/page-writeback.c:2710 at __folio_mark_dirty+0x1fb/0xe00 mm/page-writeback.c:2710, CPU#1: syz.7.228/7523
Modules linked in:
CPU: 1 UID: 0 PID: 7523 Comm: syz.7.228 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__folio_mark_dirty+0x1fb/0xe00 mm/page-writeback.c:2710
Code: 3c 38 00 74 08 48 89 df e8 22 cf 26 00 4c 8b 33 4c 89 f6 48 83 e6 08 31 ff e8 71 9a c4 ff 49 83 e6 08 75 1c e8 06 95 c4 ff 90 <0f> 0b 90 eb 16 e8 fb 94 c4 ff e9 6e 07 00 00 e8 f1 94 c4 ff eb 05
RSP: 0018:ffffc9000492fa10 EFLAGS: 00010293
RAX: ffffffff81fb181a RBX: ffffea0001030c00 RCX: ffff88801c3e0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000206181 R12: ffff88805cec4118
R13: ffff88805cec4110 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000555556842500(0000) GS:ffff888126dee000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000001c0 CR3: 0000000035bba000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 block_dirty_folio+0x17a/0x1d0 fs/buffer.c:754
 fault_dirty_shared_page+0x103/0x550 mm/memory.c:3558
 wp_page_shared mm/memory.c:3945 [inline]
 do_wp_page+0x265e/0x4970 mm/memory.c:4148
 handle_pte_fault mm/memory.c:6289 [inline]
 __handle_mm_fault mm/memory.c:6411 [inline]
 handle_mm_fault+0x9f6/0x1330 mm/memory.c:6580
 do_user_addr_fault+0xa7c/0x1380 arch/x86/mm/fault.c:1336
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x71/0xd0 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f02200d7398
Code: fc 89 37 c3 c5 fa 6f 06 c5 fa 6f 4c 16 f0 c5 fa 7f 07 c5 fa 7f 4c 17 f0 c3 66 0f 1f 84 00 00 00 00 00 48 8b 4c 16 f8 48 8b 36 <48> 89 37 48 89 4c 17 f8 c3 c5 fe 6f 54 16 e0 c5 fe 6f 5c 16 c0 c5
RSP: 002b:00007ffc18a32588 EFLAGS: 00010246
RAX: 00002000000001c0 RBX: 0000000000000004 RCX: 0030656c69662f2e
RDX: 0000000000000008 RSI: 0030656c69662f2e RDI: 00002000000001c0
RBP: 00007f0220367da0 R08: 0000001b33520000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00007f022036609c
R13: 00007f0220366090 R14: fffffffffffffffe R15: 00007ffc18a326a0
 </TASK>