------------[ cut here ]------------
warn && !folio_test_uptodate(folio)
WARNING: mm/page-writeback.c:2710 at __folio_mark_dirty+0x1fb/0xde0 mm/page-writeback.c:2710, CPU#0: syz.6.321/8626
Modules linked in:
CPU: 0 UID: 0 PID: 8626 Comm: syz.6.321 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:__folio_mark_dirty+0x1fb/0xde0 mm/page-writeback.c:2710
Code: 3c 38 00 74 08 48 89 df e8 22 9f 27 00 4c 8b 33 4c 89 f6 48 83 e6 08 31 ff e8 a1 3c c3 ff 49 83 e6 08 75 1c e8 36 37 c3 ff 90 <0f> 0b 90 eb 16 e8 2b 37 c3 ff e9 60 07 00 00 e8 21 37 c3 ff eb 05
RSP: 0018:ffffc90005c77a18 EFLAGS: 00010293
RAX: ffffffff8200000a RBX: ffffea0001301040 RCX: ffff88802cf9bc80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000260209 R12: ffff88803cfe70b8
R13: ffff88803cfe70b0 R14: 0000000000000000 R15: dffffc0000000000
FS:  000055555c6a4500(0000) GS:ffff8881265c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcb1a9a7000 CR3: 00000000540b2000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 block_dirty_folio+0x17a/0x1d0 fs/buffer.c:754
 fault_dirty_shared_page+0x103/0x550 mm/memory.c:3561
 wp_page_shared mm/memory.c:3948 [inline]
 do_wp_page+0x1ab8/0x49e0 mm/memory.c:4151
 handle_pte_fault mm/memory.c:6292 [inline]
 __handle_mm_fault mm/memory.c:6414 [inline]
 handle_mm_fault+0x9f5/0x13c0 mm/memory.c:6583
 do_user_addr_fault+0xa73/0x1360 arch/x86/mm/fault.c:1334
 handle_page_fault arch/x86/mm/fault.c:1474 [inline]
 exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f7019859deb
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:00007ffdf83583f8 EFLAGS: 00010202
RAX: 0000200000000000 RBX: 0000000000000004 RCX: 0000000000746166
RDX: 0000000000000005 RSI: 0000000074616676 RDI: 0000200000000000
RBP: fffffffffffffffe R08: 0000001b2ee20000 R09: 0000000000000001
R10: 7ffffffffffffffa R11: 0000000000000009 R12: 00007ffdf8358520
R13: 00007f7019b05fac R14: 000000000005304d R15: 00007ffdf8358500
 </TASK>