------------[ cut here ]------------
WARNING: mm/page-writeback.c:2710 at __folio_mark_dirty+0x1fb/0xe00 mm/page-writeback.c:2710, CPU#0: syz.2.225/7543
Modules linked in:
CPU: 0 UID: 0 PID: 7543 Comm: syz.2.225 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 61 9b c4 ff 49 83 e6 08 75 1c e8 f6 95 c4 ff 90 <0f> 0b 90 eb 16 e8 eb 95 c4 ff e9 6e 07 00 00 e8 e1 95 c4 ff eb 05
RSP: 0000:ffffc90004157a10 EFLAGS: 00010293
RAX: ffffffff81fb163a RBX: ffffea0000fcda40 RCX: ffff888026543c80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff940001f9b49 R12: ffff88803bfef0b8
R13: ffff88803bfef0b0 R14: 0000000000000000 R15: dffffc0000000000
FS:  000055555b533500(0000) GS:ffff888126cef000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000c40 CR3: 000000005ebb6000 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: 0033:0x7f164131736b
Code: fa 10 73 2d 83 fa 08 73 46 83 fa 04 73 16 83 fa 01 7c 10 8a 0e 74 0a 0f b7 74 16 fe 66 89 74 17 fe 88 0f c3 8b 4c 16 fc 8b 36 <89> 4c 17 fc 89 37 c3 c5 fa 6f 06 c5 fa 6f 4c 16 f0 c5 fa 7f 07 c5
RSP: 002b:00007ffc83bf5608 EFLAGS: 00010246
RAX: 0000200000000c40 RBX: 0000000000000004 RCX: 0000000000666475
RDX: 0000000000000004 RSI: 0000000000666475 RDI: 0000200000000c40
RBP: 00007f16415a7da0 R08: 0000001b2e520000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00007f16415a609c
R13: 00007f16415a6090 R14: fffffffffffffffe R15: 00007ffc83bf5720
 </TASK>