------------[ cut here ]------------
WARNING: mm/page-writeback.c:2710 at __folio_mark_dirty+0x202/0xe10 mm/page-writeback.c:2710, CPU#1: syz.0.444/8140
Modules linked in:
CPU: 1 UID: 0 PID: 8140 Comm: syz.0.444 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__folio_mark_dirty+0x202/0xe10 mm/page-writeback.c:2710
Code: 3c 20 00 74 08 48 89 df e8 ab cc 2a 00 4c 8b 33 4c 89 f6 48 83 e6 08 31 ff e8 8a 87 c4 ff 49 83 e6 08 75 20 e8 9f 82 c4 ff 90 <0f> 0b 90 eb 1a e8 94 82 c4 ff 48 8b 2c 24 e9 5d 07 00 00 e8 86 82
RSP: 0000:ffffc90002f77968 EFLAGS: 00010093
RAX: ffffffff81fcdd71 RBX: ffffea0001b081c0 RCX: ffff888034051e80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880544334d8 R08: ffffea0001b081c7 R09: 1ffffd4000361038
R10: dffffc0000000000 R11: fffff94000361039 R12: dffffc0000000000
R13: ffff8880544334e0 R14: 0000000000000000 R15: 0000000000000001
FS:  000055558a6b3500(0000) GS:ffff888126184000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000040 CR3: 000000004f8d7000 CR4: 0000000000350ef0
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+0x26ec/0x5810 mm/memory.c:4148
 handle_pte_fault mm/memory.c:6289 [inline]
 __handle_mm_fault mm/memory.c:6411 [inline]
 handle_mm_fault+0x14c5/0x32b0 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: 0033:0x7f351ee556b1
Code: 48 8b 54 24 08 48 85 d2 74 17 8b 44 24 18 0f c8 89 c0 48 89 44 24 18 48 83 fa 01 0f 85 b3 01 00 00 48 8b 44 24 10 8b 54 24 18 <89> 10 e9 15 fd ff ff 48 8b 44 24 10 8b 10 48 8b 44 24 08 48 85 c0
RSP: 002b:00007fff9de1b360 EFLAGS: 00010246
RAX: 0000200000000040 RBX: 0000000000000004 RCX: 0000000000000000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: 000055558a6b33c8
RBP: 00007fff9de1b468 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00007f351f1e609c
R13: 00007fff9de1b490 R14: fffffffffffffffe R15: 00007fff9de1b4b0
 </TASK>