podman build with --userns=keep-id results in faccessat keep-id: no such file or directory

[Hi-Angel]

Issue Description

Attempting to use --userns=keep-id to make sure the mounted directory is accessible for non-root user results in faccessat keep-id: no such file or directory error.

Steps to reproduce the issue

Steps to reproduce the issue (in terms of terminal commands)

λ cat Dockerfile
FROM docker.io/library/fedora:41
λ podman build -f Dockerfile -v $(pwd):/mnt --userns=keep-id -t test
Error: checking user namespace: faccessat keep-id: no such file or directory

Describe the results you received

Error: checking user namespace: faccessat keep-id: no such file or directory

Describe the results you expected

Build finishes successfully.

podman info output

<details>
    <summary>Details</summary>


╰─λ podman info                                                                                                                                                                                                                                                          125 ↵
host:
  arch: amd64
  buildahVersion: 1.38.0
  cgroupControllers:
  - cpu
  - memory
  - pids
  cgroupManager: systemd
  cgroupVersion: v2
  conmon:
    package: conmon-1:2.1.12-1
    path: /usr/bin/conmon
    version: 'conmon version 2.1.12, commit: e8896631295ccb0bfdda4284f1751be19b483264'
  cpuUtilization:
    idlePercent: 95.34
    systemPercent: 1.46
    userPercent: 3.2
  cpus: 12
  databaseBackend: boltdb
  distribution:
    distribution: arch
    version: unknown
  eventLogger: journald
  freeLocks: 2046
  hostname: dell-g15
  idMappings:
    gidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
    uidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
  kernel: 6.12.9-arch1-1
  linkmode: dynamic
  logDriver: none
  memFree: 1198178304
  memTotal: 16402022400
  networkBackend: netavark
  networkBackendInfo:
    backend: netavark
    dns:
      package: aardvark-dns-1.13.1-1
      path: /usr/lib/podman/aardvark-dns
      version: aardvark-dns 1.13.1
    package: netavark-1.13.1-1
    path: /usr/lib/podman/netavark
    version: netavark 1.13.1
  ociRuntime:
    name: crun
    package: crun-1.19.1-2
    path: /usr/bin/crun
    version: |-
      crun version 1.19.1
      commit: 3e32a70c93f5aa5fea69b50256cca7fd4aa23c80
      rundir: /run/user/1000/crun
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +CRIU +YAJL
  os: linux
  pasta:
    executable: /usr/bin/pasta
    package: passt-2024_12_11.09478d5-1
    version: |
      pasta 2024_12_11.09478d5
      Copyright Red Hat
      GNU General Public License, version 2 or later
        <https://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
      This is free software: you are free to change and redistribute it.
      There is NO WARRANTY, to the extent permitted by law.
  remoteSocket:
    exists: true
    path: /run/user/1000/podman/podman.sock
  rootlessNetworkCmd: pasta
  security:
    apparmorEnabled: false
    capabilities: CAP_CHOWN,CAP_DAC_OVERRIDE,CAP_FOWNER,CAP_FSETID,CAP_KILL,CAP_NET_BIND_SERVICE,CAP_SETFCAP,CAP_SETGID,CAP_SETPCAP,CAP_SETUID,CAP_SYS_CHROOT
    rootless: true
    seccompEnabled: true
    seccompProfilePath: /etc/containers/seccomp.json
    selinuxEnabled: false
  serviceIsRemote: false
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.3.1-1
    version: |-
      slirp4netns version 1.3.1
      commit: e5e368c4f5db6ae75c2fce786e31eef9da6bf236
      libslirp: 4.8.0
      SLIRP_CONFIG_VERSION_MAX: 5
      libseccomp: 2.5.5
  swapFree: 5414334464
  swapTotal: 8589930496
  uptime: 87h 51m 28.00s (Approximately 3.62 days)
  variant: ""
plugins:
  authorization: null
  log:
  - k8s-file
  - none
  - passthrough
  - journald
  network:
  - bridge
  - macvlan
  - ipvlan
  volume:
  - local
registries: {}
store:
  configFile: /home/constantine/.config/containers/storage.conf
  containerStore:
    number: 2
    paused: 0
    running: 1
    stopped: 1
  graphDriverName: overlay
  graphOptions: {}
  graphRoot: /home/constantine/.local/share/containers/storage
  graphRootAllocated: 494011416576
  graphRootUsed: 428585119744
  graphStatus:
    Backing Filesystem: btrfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Supports shifting: "true"
    Supports volatile: "true"
    Using metacopy: "false"
  imageCopyTmpDir: /var/tmp
  imageStore:
    number: 98
  runRoot: /run/user/1000/containers
  transientStore: false
  volumePath: /home/constantine/.local/share/containers/storage/volumes
version:
  APIVersion: 5.3.1
  Built: 1732225906
  BuiltTime: Fri Nov 22 00:51:46 2024
  GitCommit: 4cbdfde5d862dcdbe450c0f1d76ad75360f67a3c
  GoVersion: go1.23.3
  Os: linux
  OsArch: linux/amd64
  Version: 5.3.1

</details>

Podman in a container

No

Privileged Or Rootless

Rootless

Upstream Latest Release

Yes

Additional environment details

No response

Additional information

No response