------------[ cut here ]------------
WARNING: mm/page-writeback.c:2710 at __folio_mark_dirty+0x1fb/0xe00 mm/page-writeback.c:2710, CPU#0: syz.5.418/10761
Modules linked in:
CPU: 0 UID: 0 PID: 10761 Comm: syz.5.418 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 62 d2 26 00 4c 8b 33 4c 89 f6 48 83 e6 08 31 ff e8 01 6c c4 ff 49 83 e6 08 75 1c e8 96 66 c4 ff 90 <0f> 0b 90 eb 16 e8 8b 66 c4 ff e9 6e 07 00 00 e8 81 66 c4 ff eb 05
RSP: 0000:ffffc900051b7a10 EFLAGS: 00010293
RAX: ffffffff81fbfbfa RBX: ffffea00018a0700 RCX: ffff888027940000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff940003140e1 R12: ffff88803df158e8
R13: ffff88803df158e0 R14: 0000000000000000 R15: dffffc0000000000
FS:  00005555583f0500(0000) GS:ffff888126d03000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000040 CR3: 000000005c12e000 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+0x82/0x100 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f8095277398
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:00007ffe34332c98 EFLAGS: 00010202
RAX: 0000200000000040 RBX: 0000000000000004 RCX: 007070702f766564
RDX: 0000000000000009 RSI: 7070702f7665642f RDI: 0000200000000040
RBP: 00007f8095507da0 R08: 0000001b32d20000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00007f809550609c
R13: 00007ffe34332d90 R14: fffffffffffffffe R15: 00007ffe34332db0
 </TASK>