------------[ cut here ]------------
WARNING: CPU: 1 PID: 5791 at fs/inode.c:389 inc_nlink+0x128/0x154 fs/inode.c:389
Modules linked in:
CPU: 1 PID: 5791 Comm: syz.0.197 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 : ffff8000211b7050
x29: ffff8000211b7050 x28: ffff0000f6313540 x27: 0000000000000004
x26: fffffc000330bd00 x25: dfff800000000000 x24: ffff8000211b7260
x23: 1fffe0001ec62595 x22: dfff800000000000 x21: 0000000000004000
x20: ffff0000f6312c60 x19: ffff0000f6312ca8 x18: ffff800011a5bd40
x17: ffff800018184000 x16: ffff8000082e9244 x15: 0000000000000002
x14: 0000000000006000 x13: 00000000202fbf00 x12: 0000000000080000
x11: 0000000000010fc9 x10: ffff8000222da000 x9 : ffff8000089fe30c
x8 : 0000000000010fca x7 : 00000000202fbf00 x6 : 000000000000003e
x5 : ffff0000f6313d88 x4 : ffff0000f6313d48 x3 : ffff80000a28f394
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 inc_nlink+0x128/0x154 fs/inode.c:389
 f2fs_i_links_write fs/f2fs/f2fs.h:3047 [inline]
 f2fs_update_parent_metadata+0xa8/0x2a4 fs/f2fs/dir.c:666
 f2fs_add_inline_entry+0x488/0x628 fs/f2fs/inline.c:675
 f2fs_add_dentry fs/f2fs/dir.c:843 [inline]
 f2fs_do_add_link+0x250/0x4d4 fs/f2fs/dir.c:886
 f2fs_add_link fs/f2fs/f2fs.h:3537 [inline]
 f2fs_mkdir+0x28c/0x4d4 fs/f2fs/namei.c:711
 vfs_mkdir+0x314/0x4d4 fs/namei.c:4114
 ovl_do_mkdir fs/overlayfs/overlayfs.h:186 [inline]
 ovl_mkdir_real+0xa8/0x200 fs/overlayfs/dir.c:146
 ovl_workdir_create+0x2a4/0x634 fs/overlayfs/super.c:799
 ovl_make_workdir fs/overlayfs/super.c:1389 [inline]
 ovl_get_workdir+0x2fc/0x1068 fs/overlayfs/super.c:1539
 ovl_fill_super+0x139c/0x2294 fs/overlayfs/super.c:2095
 mount_nodev+0x68/0x104 fs/super.c:1489
 ovl_mount+0x3c/0x50 fs/overlayfs/super.c:2186
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632
 vfs_get_tree+0x90/0x274 fs/super.c:1573
 do_new_mount+0x228/0x810 fs/namespace.c:3078
 path_mount+0x5b4/0xe78 fs/namespace.c:3408
 do_mount fs/namespace.c:3421 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount fs/namespace.c:3606 [inline]
 __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3606
 __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: 363822
hardirqs last  enabled at (363821): [<ffff80000892886c>] folio_memcg_lock+0xe8/0x1fc mm/memcontrol.c:2113
hardirqs last disabled at (363822): [<ffff8000118fa220>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (363500): [<ffff8000080309e0>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (363498): [<ffff8000080309ac>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
overlayfs: conflicting lowerdir path