------------[ cut here ]------------
ifs_is_fully_uptodate(folio, ifs) != folio_test_uptodate(folio)
WARNING: fs/iomap/buffered-io.c:264 at ifs_free+0x358/0x420 fs/iomap/buffered-io.c:263, CPU#0: kswapd1/79
Modules linked in:
CPU: 0 UID: 0 PID: 79 Comm: kswapd1 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:ifs_free+0x358/0x420 fs/iomap/buffered-io.c:263
Code: 41 5f 5d e9 aa f0 bd ff e8 d5 2e 5e ff 90 0f 0b 90 e9 d0 fe ff ff e8 c7 2e 5e ff 90 0f 0b 90 e9 0a ff ff ff e8 b9 2e 5e ff 90 <0f> 0b 90 eb c3 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 06 fe ff ff
RSP: 0018:ffffc90000d8ec08 EFLAGS: 00010293
RAX: ffffffff826795b7 RBX: 0000000000000008 RCX: ffff888030a8a4c0
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
RBP: 0000000082681001 R08: ffffea0001439587 R09: 1ffffd40002872b0
R10: dffffc0000000000 R11: fffff940002872b1 R12: ffff888012edf544
R13: ffff888012edf500 R14: ffffea0001439580 R15: 1ffffd40002872b1
FS:  0000000000000000(0000) GS:ffff88808ca49000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8f05f48d50 CR3: 0000000012e61000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 iomap_release_folio+0x25c/0x490 fs/iomap/buffered-io.c:742
 shrink_folio_list+0x2226/0x5290 mm/vmscan.c:1491
 evict_folios+0x4795/0x5880 mm/vmscan.c:4718
 try_to_shrink_lruvec+0xb62/0xfa0 mm/vmscan.c:4881
 shrink_one+0x25c/0x710 mm/vmscan.c:4926
 shrink_many mm/vmscan.c:4989 [inline]
 lru_gen_shrink_node mm/vmscan.c:5067 [inline]
 shrink_node+0x3197/0x3a90 mm/vmscan.c:6047
 kswapd_shrink_node mm/vmscan.c:6894 [inline]
 balance_pgdat mm/vmscan.c:7070 [inline]
 kswapd+0x1742/0x2e10 mm/vmscan.c:7343
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>