F2FS-fs (loop5): Found nat_bits in checkpoint
F2FS-fs (loop5): Mounted with checkpoint version = 48b305e4
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5916 at fs/inode.c:389 inc_nlink+0x128/0x154 fs/inode.c:389
Modules linked in:
CPU: 1 PID: 5916 Comm: syz.5.280 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : inc_nlink+0x128/0x154 fs/inode.c:389
lr : inc_nlink+0x128/0x154 fs/inode.c:389
sp : ffff800021d37780
x29: ffff800021d37780 x28: 0000000000000000 x27: ffff0000d7603e20
x26: ffff0000d4bde076 x25: ffff0000d7606a80 x24: 0000000000000a56
x23: 1fffe0001aec06b1 x22: dfff800000000000 x21: 0000000000000001
x20: ffff0000d7603540 x19: ffff0000d7603588 x18: ffff800011abbcc0
x17: ffff8000181fa000 x16: ffff8000082cdb18 x15: ffff800017cdafc0
x14: ffff0000d8bda658 x13: 1ffff00002a180b1 x12: 0000000000ff0100
x11: ff008000089fc748 x10: 0000000000000000 x9 : ffff8000089fc748
x8 : ffff0000d8bd9bc0 x7 : ffff80000a24b1b4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000082cdd0c
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 inc_nlink+0x128/0x154 fs/inode.c:389
 f2fs_i_links_write+0x2c/0x58 fs/f2fs/f2fs.h:3047
 f2fs_cross_rename fs/f2fs/namei.c:1190 [inline]
 f2fs_rename2+0xc24/0x1bd4 fs/f2fs/namei.c:1258
 vfs_rename+0x954/0xdcc fs/namei.c:4874
 do_renameat2+0x738/0xa54 fs/namei.c:5027
 __do_sys_renameat2 fs/namei.c:5060 [inline]
 __se_sys_renameat2 fs/namei.c:5057 [inline]
 __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5057
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 278118
hardirqs last  enabled at (278117): [<ffff8000083bf590>] seqcount_lockdep_reader_access include/linux/seqlock.h:104 [inline]
hardirqs last  enabled at (278117): [<ffff8000083bf590>] ktime_get_coarse_real_ts64+0x114/0x244 kernel/time/timekeeping.c:2261
hardirqs last disabled at (278118): [<ffff8000119576b0>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (277952): [<ffff80000803092c>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (277950): [<ffff8000080308f8>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---