------------[ cut here ]------------
WARNING: mm/page-writeback.c:2710 at __folio_mark_dirty+0x202/0xe10 mm/page-writeback.c:2710, CPU#0: syz.0.0/5342
Modules linked in:
CPU: 0 UID: 0 PID: 5342 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__folio_mark_dirty+0x202/0xe10 mm/page-writeback.c:2710
Code: 3c 20 00 74 08 48 89 df e8 8b d8 2a 00 4c 8b 33 4c 89 f6 48 83 e6 08 31 ff e8 1a fc c2 ff 49 83 e6 08 75 20 e8 2f f7 c2 ff 90 <0f> 0b 90 eb 1a e8 24 f7 c2 ff 48 8b 2c 24 e9 5d 07 00 00 e8 16 f7
RSP: 0000:ffffc9000a127810 EFLAGS: 00010093
RAX: ffffffff81fec971 RBX: ffffea00007f6f40 RCX: ffff88801c4fa4c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880472aab38 R08: ffffea00007f6f47 R09: 1ffffd40000fede8
R10: dffffc0000000000 R11: fffff940000fede9 R12: dffffc0000000000
R13: ffff8880472aab40 R14: 0000000000000000 R15: 0000000000000001
FS:  0000555590936500(0000) GS:ffff88808d22a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000140 CR3: 0000000011186000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 block_dirty_folio+0x17a/0x1d0 fs/buffer.c:754
 ext4_block_page_mkwrite fs/ext4/inode.c:6634 [inline]
 ext4_page_mkwrite+0xf07/0x1190 fs/ext4/inode.c:6731
 do_page_mkwrite+0x14d/0x310 mm/memory.c:3528
 wp_page_shared mm/memory.c:3929 [inline]
 do_wp_page+0x2676/0x5810 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: 0033:0x7f3b544555f3
Code: 8b 44 24 08 48 85 c0 74 17 48 8b 54 24 18 48 0f ca 48 89 54 24 18 48 83 f8 01 0f 85 7a 02 00 00 48 8b 44 24 10 48 8b 54 24 18 <48> 89 10 e9 d2 fd ff ff 48 8b 44 24 10 0f b7 10 48 8b 44 24 08 48
RSP: 002b:00007ffc2ef6ec00 EFLAGS: 00010246
RAX: 0000200000000140 RBX: 0000000000000008 RCX: 0000000000000000
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 00005555909363c8
RBP: 00007ffc2ef6ed08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 00007f3b547e5fac
R13: 00007ffc2ef6ed30 R14: fffffffffffffffe R15: 00007ffc2ef6ed50
 </TASK>