------------[ cut here ]------------
WARNING: mm/page-writeback.c:2710 at __folio_mark_dirty+0x1fb/0xe00 mm/page-writeback.c:2710, CPU#0: syz.5.191/7290
Modules linked in:
CPU: 0 UID: 0 PID: 7290 Comm: syz.5.191 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 c2 d2 26 00 4c 8b 33 4c 89 f6 48 83 e6 08 31 ff e8 f1 66 c4 ff 49 83 e6 08 75 1c e8 86 61 c4 ff 90 <0f> 0b 90 eb 16 e8 7b 61 c4 ff e9 6e 07 00 00 e8 71 61 c4 ff eb 05
RSP: 0000:ffffc90005ac7a10 EFLAGS: 00010293
RAX: ffffffff81fc025a RBX: ffffea00019423c0 RCX: ffff888029909e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000328479 R12: ffff88804a24a948
R13: ffff88804a24a940 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000555559f67500(0000) GS:ffff888126d01000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000be0 CR3: 0000000057362000 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: 0033:0x7f560ade74c7
Code: ce 48 ff c7 48 01 fe 48 8d 54 11 80 0f 1f 80 00 00 00 00 c5 fe 6f 0e c5 fe 6f 56 20 c5 fe 6f 5e 40 c5 fe 6f 66 60 48 83 ee 80 <c5> fd 7f 0f c5 fd 7f 57 20 c5 fd 7f 5f 40 c5 fd 7f 67 60 48 83 ef
RSP: 002b:00007ffca6a71708 EFLAGS: 00010207
RAX: 0000200000000bc0 RBX: 0000000000000004 RCX: 0000200000000bc0
RDX: 0000200000000c41 RSI: 0000001b31c253cc RDI: 0000200000000be0
RBP: 00007f560b077da0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00007f560b07609c
R13: 00007f560b076090 R14: fffffffffffffffe R15: 00007ffca6a71820
 </TASK>