------------[ cut here ]------------
WARNING: CPU: 0 PID: 4688 at fs/inode.c:389 inc_nlink+0x128/0x154 fs/inode.c:389
Modules linked in:
CPU: 0 PID: 4688 Comm: syz.3.34 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
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 : ffff800021287480
x29: ffff800021287480 x28: 0000000000000000 x27: ffff0000e1938000
x26: ffff0000d562a1d1 x25: ffff0000f664b540 x24: 0000000000000028
x23: 1fffe0001ecc96b1 x22: dfff800000000000 x21: 0000000000004001
x20: ffff0000f664b540 x19: ffff0000f664b588 x18: 0000000000000000
x17: ffff800018184000 x16: ffff8000082cf240 x15: ffff800017c65000
x14: ffff0000cdd74218 x13: 1ffff00002a0a0b1 x12: 0000000000080000
x11: 0000000000013f5b x10: ffff800025f3a000 x9 : ffff8000089fe30c
x8 : 0000000000013f5c x7 : ffff80000a24d2dc x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000082cf434
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:1209 [inline]
 f2fs_rename2+0xd64/0x1bd4 fs/f2fs/namei.c:1258
 vfs_rename+0x954/0xdcc fs/namei.c:4882
 ovl_do_rename+0x140/0x210 fs/overlayfs/overlayfs.h:297
 ovl_create_over_whiteout fs/overlayfs/dir.c:534 [inline]
 ovl_create_or_link+0xe24/0x114c fs/overlayfs/dir.c:625
 ovl_create_object+0x190/0x24c fs/overlayfs/dir.c:659
 ovl_mkdir+0x34/0x44 fs/overlayfs/dir.c:679
 vfs_mkdir+0x314/0x4d4 fs/namei.c:4114
 do_mkdirat+0x1b4/0x3e0 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+0x98/0x2bc 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: 364318
hardirqs last  enabled at (364317): [<ffff8000083c0b24>] seqcount_lockdep_reader_access include/linux/seqlock.h:104 [inline]
hardirqs last  enabled at (364317): [<ffff8000083c0b24>] ktime_get_coarse_real_ts64+0x114/0x244 kernel/time/timekeeping.c:2261
hardirqs last disabled at (364318): [<ffff8000118fa220>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (364142): [<ffff8000080309e0>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (364140): [<ffff8000080309ac>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---