F2FS-fs (loop3): Found nat_bits in checkpoint
F2FS-fs (loop3): Mounted with checkpoint version = 48b305e4
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4578 at fs/inode.c:389 inc_nlink+0x128/0x150 fs/inode.c:389
Modules linked in:
CPU: 1 PID: 4578 Comm: syz.3.28 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : inc_nlink+0x128/0x150 fs/inode.c:389
lr : inc_nlink+0x128/0x150 fs/inode.c:389
sp : ffff800021087870
x29: ffff800021087870 x28: ffff0000f64a4840 x27: 0000000000000004
x26: fffffc0003d6d1c0 x25: dfff800000000000 x24: ffff800021087a80
x23: 1fffe0001ec947f0 x22: dfff800000000000 x21: 0000000000000000
x20: ffff0000f64a3f38 x19: ffff0000f64a3f80 x18: 000000006e1067c4
x17: ffff80001836c000 x16: ffff8000082ef09c x15: 0000000000000002
x14: 0000000000000001 x13: 1fffff80007ada3e x12: 0000000000080000
x11: 000000000000dd37 x10: ffff80002a9c0000 x9 : ffff800008a0e4f8
x8 : 000000000000dd38 x7 : 00000000202fbf00 x6 : 0000000000000024
x5 : ffff0000f64a50a8 x4 : ffff0000f64a5068 x3 : ffff80000a2cea08
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 inc_nlink+0x128/0x150 fs/inode.c:389
 f2fs_i_links_write fs/f2fs/f2fs.h:3051 [inline]
 f2fs_update_parent_metadata+0xa8/0x29c fs/f2fs/dir.c:666
 f2fs_add_inline_entry+0x488/0x630 fs/f2fs/inline.c:675
 f2fs_add_dentry fs/f2fs/dir.c:843 [inline]
 f2fs_do_add_link+0x264/0x4f0 fs/f2fs/dir.c:886
 f2fs_add_link fs/f2fs/f2fs.h:3542 [inline]
 f2fs_mkdir+0x28c/0x4cc fs/f2fs/namei.c:711
 vfs_mkdir+0x314/0x4d4 fs/namei.c:4114
 do_mkdirat+0x1b8/0x3ec fs/namei.c:4139
 __do_sys_mkdirat fs/namei.c:4154 [inline]
 __se_sys_mkdirat fs/namei.c:4152 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 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: 374124
hardirqs last  enabled at (374123): [<ffff8000089379ec>] folio_memcg_lock+0xe8/0x1f4 mm/memcontrol.c:2113
hardirqs last disabled at (374124): [<ffff800011a41dec>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (373980): [<ffff800008030954>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (373978): [<ffff800008030920>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---