Cannot create subdirectory under a directory with 777 permission [closed]

I am unsure if this is related to docker or ubuntu. I got a docker image from coworker and working inside it. I created a container based on the image with volume mapping to host system like docker run -it -v /data/dira:/dira image_from_coworker, and tried to create new directory under /dira using command mkdir /dira/test, but it fails with permission denied message:

# inside the containerI have no name!@7aa44e2d4926:/dirk$ ls -ald /diradrwxrwxrwx+ 4 root root 4096 Jul 18 23:19 /diraI have no name!@7aa44e2d4926:/dirk$ mkdir /dira/testmkdir: cannot create directory '/dira/test': Permission deniedI have no name!@7aa44e2d4926:/dirk$ iduid=1000 gid=0(root) groups=0(root)

Since /dira has 777 permission, as my best knowledge, anyone can access and write something under the directory. But I couldn't do. It is so strange. I also noticed there is + symbol at /dira and inspected the ACL, but there looked no special things.

# I checked the ACL from host since the guest doesn't have getfacl command installed.(base) $ getfacl /data/dira/# file: data/dira/# owner: root# group: rootuser::rwxgroup::r-xgroup:sudo:rwxmask::rwxother::rwxdefault:user::rwxdefault:group::r-xdefault:group:sudo:rwxdefault:mask::rwxdefault:other::r-x

Could anyone help me out with resolving this?

About the host and guest systems.

# host(base) $ uname -r6.5.0-35-generic(base) $ lsb_release -aNo LSB modules are available.Distributor ID: UbuntuDescription:    Ubuntu 22.04.3 LTSRelease:        22.04Codename:       jammy# guestI have no name!@7aa44e2d4926:/dirk$ uname -r6.5.0-35-genericI have no name!@7aa44e2d4926:/dirk$ lsb_release -aNo LSB modules are available.Distributor ID: UbuntuDescription:    Ubuntu 20.04.5 LTSRelease:        20.04Codename:       focal

More about the /data: this directory is a hard drive mounted on the host system.

(base) $ df -hFilesystem                 Size  Used Avail Use% Mounted ontmpfs                       26G   11M   26G   1% /run/dev/mapper/vgubuntu-root  1.7T  1.4T  278G  84% /tmpfs                      126G     0  126G   0% /dev/shmtmpfs                      5.0M  4.0K  5.0M   1% /run/lockefivarfs                   128K   31K   93K  25% /sys/firmware/efi/efivars/dev/nvme0n1p1             511M  6.1M  505M   2% /boot/efi/dev/sda1                  7.0T  4.9T  1.8T  74% /data...

Thanks for your concerning!