F2FS-fs (loop7): Found nat_bits in checkpoint
F2FS-fs (loop7): Mounted with checkpoint version = 48b305e4
------------[ cut here ]------------
WARNING: CPU: 1 PID: 13177 at fs/inode.c:389 inc_nlink+0x128/0x150 fs/inode.c:389
Modules linked in:
CPU: 1 PID: 13177 Comm: syz.7.1910 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026
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 : ffff800020fa7870
x29: ffff800020fa7870 x28: ffff0000ef7a3f38 x27: 0000000000000004
x26: fffffc0003d47780 x25: dfff800000000000 x24: ffff800020fa7a80
x23: 1fffe0001def46cf x22: dfff800000000000 x21: 0000000000000000
x20: ffff0000ef7a3630 x19: ffff0000ef7a3678 x18: 0000000000000000
x17: ffff80001835a000 x16: ffff8000082eef80 x15: 0000000000000002
x14: 0000000000000001 x13: 1fffff80007a8ef6 x12: 0000000000080000
x11: 00000000000137cd x10: ffff8000359a6000 x9 : ffff800008a0e0b4
x8 : 00000000000137ce x7 : 000000000aba9500 x6 : 0000000000000211
x5 : ffff0000ef7a47a0 x4 : ffff0000ef7a4760 x3 : ffff80000a2cde8c
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: 279674
hardirqs last  enabled at (279673): [<ffff800008937630>] folio_memcg_lock+0xe8/0x1f4 mm/memcontrol.c:2113
hardirqs last disabled at (279674): [<ffff800011a33e5c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (279576): [<ffff800008030954>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (279574): [<ffff800008030920>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---