F2FS-fs (loop2): Found nat_bits in checkpoint
F2FS-fs (loop2): Mounted with checkpoint version = 48b305e4
xt_l2tp: v2 doesn't support IP mode
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4530 at fs/inode.c:389 inc_nlink+0x128/0x150 fs/inode.c:389
Modules linked in:
CPU: 1 PID: 4530 Comm: syz.2.26 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
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 : ffff8000210c78b0
x29: ffff8000210c78b0 x28: ffff700004218f2c x27: ffff8000210c7aa0
x26: 0000000000000004 x25: fffffc0003cf8480 x24: dfff800000000000
x23: 1fffe0001ea0f36c x22: dfff800000000000 x21: 0000000000000000
x20: ffff0000f5079b18 x19: ffff0000f5079b60 x18: 1fffe00033e7697e
x17: ffff80001537d000 x16: ffff8000082f2d40 x15: 0000000000000002
x14: 0000000000000001 x13: 1fffff800079f096 x12: 0000000000080000
x11: 00000000000111ea x10: ffff800026e39000 x9 : ffff800008a1c318
x8 : 00000000000111eb x7 : 0000000010b07600 x6 : 0000000000000025
x5 : ffff0000f507ac88 x4 : ffff0000f507ac48 x3 : ffff80000a35c858
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 inc_nlink+0x128/0x150 fs/inode.c:389
 f2fs_i_links_write fs/f2fs/f2fs.h:3056 [inline]
 f2fs_update_parent_metadata+0xa8/0x2a0 fs/f2fs/dir.c:666
 f2fs_add_inline_entry+0x4c4/0x68c fs/f2fs/inline.c:675
 f2fs_add_dentry fs/f2fs/dir.c:843 [inline]
 f2fs_do_add_link+0x264/0x4f8 fs/f2fs/dir.c:886
 f2fs_add_link fs/f2fs/f2fs.h:3547 [inline]
 f2fs_mkdir+0x290/0x4d0 fs/f2fs/namei.c:711
 vfs_mkdir+0x314/0x4d8 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+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 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: 281966
hardirqs last  enabled at (281965): [<ffff8000089451b4>] folio_memcg_lock+0xe8/0x1f8 mm/memcontrol.c:2113
hardirqs last disabled at (281966): [<ffff800011b8c2bc>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (281860): [<ffff800008031254>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (281858): [<ffff800008031220>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---