------------[ cut here ]------------
WARNING: mm/page-writeback.c:2710 at __folio_mark_dirty+0x1fb/0xe00 mm/page-writeback.c:2710, CPU#1: syz.4.12/5975
Modules linked in:
CPU: 1 UID: 0 PID: 5975 Comm: syz.4.12 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 31 9d c4 ff 49 83 e6 08 75 1c e8 c6 97 c4 ff 90 <0f> 0b 90 eb 16 e8 bb 97 c4 ff e9 6e 07 00 00 e8 b1 97 c4 ff eb 05
RSP: 0000:ffffc9000622fa10 EFLAGS: 00010293
RAX: ffffffff81fb146a RBX: ffffea00018186c0 RCX: ffff88805b8ddac0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff940003030d9 R12: ffff88805e1a9178
R13: ffff88805e1a9170 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000555583e22500(0000) GS:ffff888126def000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000000c0 CR3: 000000002a01c000 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: 0033:0x7f90f08d55f3
Code: 8b 44 24 08 48 85 c0 74 17 48 8b 54 24 18 48 0f ca 48 89 54 24 18 48 83 f8 01 0f 85 7a 02 00 00 48 8b 44 24 10 48 8b 54 24 18 <48> 89 10 e9 d2 fd ff ff 48 8b 44 24 10 0f b7 10 48 8b 44 24 08 48
RSP: 002b:00007ffe2f1d6fa0 EFLAGS: 00010246
RAX: 00002000000000c0 RBX: 0000000000000008 RCX: 0000000000000000
RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000555583e223c8
RBP: 00007ffe2f1d70a8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00007f90f0c65fac
R13: 00007ffe2f1d70d0 R14: fffffffffffffffe R15: 00007ffe2f1d70f0
 </TASK>