------------[ cut here ]------------
warn && !folio_test_uptodate(folio)
WARNING: mm/page-writeback.c:2666 at __folio_mark_dirty+0x202/0xe40 mm/page-writeback.c:2666, CPU#0: syz.0.0/5322
Modules linked in:
CPU: 0 UID: 0 PID: 5322 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 04/01/2014
RIP: 0010:__folio_mark_dirty+0x202/0xe40 mm/page-writeback.c:2666
Code: 3c 20 00 74 08 48 89 df e8 0b 4b 2c 00 4c 8b 33 4c 89 f6 48 83 e6 08 31 ff e8 4a 83 c0 ff 49 83 e6 08 75 20 e8 5f 7e c0 ff 90 <0f> 0b 90 eb 1a e8 54 7e c0 ff 48 8b 2c 24 e9 56 07 00 00 e8 46 7e
RSP: 0018:ffffc9000dedf818 EFLAGS: 00010093
RAX: ffffffff82052ac1 RBX: ffffea00011ad640 RCX: ffff8880354e8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888047296e40 R08: ffffea00011ad647 R09: 1ffffd4000235ac8
R10: dffffc0000000000 R11: fffff94000235ac9 R12: dffffc0000000000
R13: ffff888047296e48 R14: 0000000000000000 R15: 0000000000000001
FS:  000055558ef90540(0000) GS:ffff88808ca58000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8516ab9ee0 CR3: 000000003da26000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 block_dirty_folio+0x17a/0x1d0 fs/buffer.c:751
 ext4_block_page_mkwrite fs/ext4/inode.c:6582 [inline]
 ext4_page_mkwrite+0xf18/0x11a0 fs/ext4/inode.c:6679
 do_page_mkwrite+0x14d/0x310 mm/memory.c:3589
 wp_page_shared mm/memory.c:3990 [inline]
 do_wp_page+0x1a4b/0x5a00 mm/memory.c:4209
 handle_pte_fault mm/memory.c:6332 [inline]
 __handle_mm_fault mm/memory.c:6454 [inline]
 handle_mm_fault+0x1520/0x3310 mm/memory.c:6623
 do_user_addr_fault+0xa73/0x1340 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: 0033:0x7f871f16cdc8
Code: 66 89 74 17 02 88 0f c3 c5 fa 6f 06 c5 fa 6f 4c 16 f0 c5 fa 7f 07 c5 fa 7f 4c 17 f0 c3 0f 1f 44 00 00 48 8b 4c 16 f8 48 8b 36 <48> 89 37 48 89 4c 17 f8 c3 62 e1 fe 28 6f 54 16 ff 62 e1 fe 28 6f
RSP: 002b:00007ffdeeebe138 EFLAGS: 00010202
RAX: 0000200000000040 RBX: 0000000000000004 RCX: 0030626c6c756e2f
RDX: 000000000000000c RSI: 6c756e2f7665642f RDI: 0000200000000040
RBP: fffffffffffffffe R08: 00007f871efff030 R09: 0000000000000001
R10: 7ffffffffffffff3 R11: 0000000000000009 R12: 00007ffdeeebe260
R13: 00007f871f41609c R14: 0000000000014fde R15: 00007ffdeeebe240
 </TASK>