aufs - linux 6.9-6.10

[yodayox]

mkdir uno
mkdir duo
mkdir tre
mount -t aufs -o dirs=uno=rw:duo=ro none tre
mount: /root/tre: filesystem was mounted, but any subsequent operation failed: Operation not permitted.

and dmesg output related to

[  388.157411] aufs 6.6-20231106
[  388.158824] ------------[ cut here ]------------
[  388.158840] WARNING: CPU: 1 PID: 2910 at vfs_getattr+0x3f/0x50
[  388.158859] Modules linked in: aufs snd_usb_audio snd_usbmidi_lib snd_ump snd_rawmidi mc bnep af_packet intel_rapl_msr intel_rapl_common crc32_pclmul crc32c_intel polyval_clmulni polyval_generic gf128mul ghash_clmulni_intel sha512_ssse3 sha256_ssse3 sha1_ssse3 sha1_generic aesni_intel crypto_simd cryptd rapl psmouse sg sr_mod i2c_piix4 vboxguest cdrom serio_raw e1000 snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec snd_hda_core snd_hwdep snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm binfmt_misc crypto_user firewire_ohci firewire_sbp2 firewire_core crc_itu_t efivarfs video wmi evdev joydev snd_seq snd_seq_device snd_timer snd soundcore vhost_vsock vmw_vsock_virtio_transport_common vsock vhost_net tap vhost vhost_iotlb hci_vhci bluetooth ecdh_generic ecc vfio_iommu_type1 vfio dm_mod uinput userio ppp_generic slhc tun loop cuse fuse nvmet_rdma nvme_loop nvme_fcloop nvmet_fc nvmet nvme_rdma rdma_cm iw_cm ib_cm ib_core ipv6 crc_ccitt configfs pata_acpi atkbd vivaldi_fmap vmwgfx drm_ttm_helper ttm
[  388.159064]  drm_kms_helper drm
[  388.159072] CPU: 1 PID: 2910 Comm: mount Not tainted 6.6.10-pclos1 #1
[  388.159077] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[  388.159080] RIP: 0010:vfs_getattr+0x3f/0x50
[  388.159086] Code: e8 c6 1b 21 00 85 c0 74 0b 5b 5d 41 5c 41 5d c3 cc cc cc cc 89 d9 44 89 ea 5b 4c 89 e6 48 89 ef 5d 41 5c 41 5d e9 f1 fe ff ff <0f> 0b b8 ff ff ff ff c3 cc cc cc cc 0f 1f 44 00 00 90 90 90 90 90
[  388.159090] RSP: 0018:ffffb7dc85397da8 EFLAGS: 00010286
[  388.159095] RAX: ffff981c02488180 RBX: 0000000000000000 RCX: 0000000080000000
[  388.159099] RDX: 0000000000001000 RSI: ffffb7dc85397e60 RDI: ffffb7dc85397dc8
[  388.159102] RBP: ffffb7dc85397e00 R08: 0000000000000000 R09: ffffb7dc85397e18
[  388.159105] R10: 0000000000001000 R11: 0000000000000001 R12: ffffb7dc85397e60
[  388.159108] R13: ffff981d005e2180 R14: ffff981c4188add8 R15: ffff981c02b9c800
[  388.159111] FS:  00007fc935a36740(0000) GS:ffff981d1bd00000(0000) knlGS:0000000000000000
[  388.159117] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  388.159120] CR2: 00000000015ff068 CR3: 0000000043b54001 CR4: 00000000000706e0
[  388.159124] Call Trace:
[  388.159135]  <TASK>
[  388.159210]  ? __warn+0x6b/0xd0
[  388.159221]  ? vfs_getattr+0x3f/0x50
[  388.159226]  ? report_bug+0x11a/0x150
[  388.159236]  ? handle_bug+0x3c/0x70
[  388.159242]  ? exc_invalid_op+0x13/0x60
[  388.159247]  ? asm_exc_invalid_op+0x16/0x20
[  388.159253]  ? vfs_getattr+0x3f/0x50
[  388.159259]  aufs_getattr+0xd9/0x1c0 [aufs]
[  388.159293]  vfs_statx+0x9b/0x140
[  388.159296]  do_statx+0x2e/0x60
[  388.159300]  __x64_sys_statx+0x5d/0x80
[  388.159303]  do_syscall_64+0x3a/0x90
[  388.159309]  entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[  388.159312] RIP: 0033:0x7fc935b80f1a
[  388.159314] Code: 64 48 8b 14 25 00 00 00 00 48 8b 05 f0 4e 0d 00 c7 04 02 16 00 00 00 b8 ff ff ff ff c3 0f 1f 00 41 89 ca b8 4c 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 2e 89 c1 85 c0 74 19 64 4c 8b 0c 25 00 00 00
[  388.159316] RSP: 002b:00007ffc079ca818 EFLAGS: 00000206 ORIG_RAX: 000000000000014c
[  388.159319] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc935b80f1a
[  388.159321] RDX: 0000000000001000 RSI: 00007fc935ca93a5 RDI: 0000000000000004
[  388.159322] RBP: 0000000000ac5600 R08: 00007ffc079ca820 R09: 0000000000000000
[  388.159324] R10: 0000000000001000 R11: 0000000000000206 R12: 0000000000ac67c0
[  388.159325] R13: 00007fc935cbf4e0 R14: 0000000000000004 R15: 00007fc935cc0fcc
[  388.159328]  </TASK>
[  388.159329] ---[ end trace 0000000000000000 ]---

any ideea ? thx!