podman: Build with `--mount=type=bind` can't access the mounted folder

Is this a BUG REPORT or FEATURE REQUEST? (leave only one on its own line)

/kind bug

Description

I’m trying to make my Dockerfile more compatible with podman and seeing an error when I mount the current directory with RUN --mount=type=bind. This works with docker. I couldn’t find much in the docs about this and the paramenters supported by bind.

With a Dockerfile with a step like this:

RUN --mount=type=bind,target=/tmp/files/ ls -la /tmp; cp -a /tmp/files/some_file /

(I’ve added the ls -la for debug)

Steps to reproduce the issue:

1. podman build -f Dockerfile .

Describe the results you received:

total 4
drwxr-xr-t.  3 root root   19 Aug 23 01:31 .
dr-xr-xr-x.  1 root root   61 Aug 23 01:31 ..
drwx------. 13 root root 4096 Aug 23 01:31 files
cp: cannot stat '/tmp/files/some_file': Permission denied

Describe the results you expected:

I wouldn’t expect any errors and that the file is copied to the root folder /

This is the output from the ls -la with docker, so maybe it’s mounted with the wrong permissions? But I’m assuming this runs as root so it should be able to access the directory anyway

#16 0.209 total 16
#16 0.209 drwxrwxrwt  1 root root 4096 Aug 23 01:43 .
#16 0.209 drwxr-xr-x  1 root root 4096 Aug 23 01:43 ..
#16 0.209 drwxr-xr-x 13 root root 4096 Aug 23 01:43 files

Additional information you deem important (e.g. issue happens only occasionally):

Output of podman version:

❯ podman version
Client:       Podman Engine
Version:      4.2.0
API Version:  4.2.0
Go Version:   go1.18.5
Built:        Wed Aug 10 13:46:05 2022
OS/Arch:      darwin/arm64

Server:       Podman Engine
Version:      4.2.0
API Version:  4.2.0
Go Version:   go1.18.4
Built:        Thu Aug 11 07:43:11 2022
OS/Arch:      linux/arm64

Output of podman info:

❯ podman info
host:
  arch: arm64
  buildahVersion: 1.27.0
  cgroupControllers:
  - cpu
  - io
  - memory
  - pids
  cgroupManager: systemd
  cgroupVersion: v2
  conmon:
    package: conmon-2.1.0-2.fc36.aarch64
    path: /usr/bin/conmon
    version: 'conmon version 2.1.0, commit: '
  cpuUtilization:
    idlePercent: 96.82
    systemPercent: 1.85
    userPercent: 1.33
  cpus: 1
  distribution:
    distribution: fedora
    variant: coreos
    version: "36"
  eventLogger: journald
  hostname: localhost.localdomain
  idMappings:
    gidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 1000000
    uidmap:
    - container_id: 0
      host_id: 502
      size: 1
    - container_id: 1
      host_id: 100000
      size: 1000000
  kernel: 5.18.18-200.fc36.aarch64
  linkmode: dynamic
  logDriver: journald
  memFree: 1124417536
  memTotal: 2051829760
  networkBackend: netavark
  ociRuntime:
    name: crun
    package: crun-1.5-1.fc36.aarch64
    path: /usr/bin/crun
    version: |-
      crun version 1.5
      commit: 54ebb8ca8bf7e6ddae2eb919f5b82d1d96863dea
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +CRIU +YAJL
  os: linux
  remoteSocket:
    exists: true
    path: /run/user/502/podman/podman.sock
  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: /usr/share/containers/seccomp.json
    selinuxEnabled: true
  serviceIsRemote: true
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.2.0-0.2.beta.0.fc36.aarch64
    version: |-
      slirp4netns version 1.2.0-beta.0
      commit: 477db14a24ff1a3de3a705e51ca2c4c1fe3dda64
      libslirp: 4.6.1
      SLIRP_CONFIG_VERSION_MAX: 3
      libseccomp: 2.5.3
  swapFree: 0
  swapTotal: 0
  uptime: 0h 21m 25.00s
plugins:
  authorization: null
  log:
  - k8s-file
  - none
  - passthrough
  - journald
  network:
  - bridge
  - macvlan
  volume:
  - local
registries:
  search:
  - docker.io
store:
  configFile: /var/home/core/.config/containers/storage.conf
  containerStore:
    number: 0
    paused: 0
    running: 0
    stopped: 0
  graphDriverName: overlay
  graphOptions: {}
  graphRoot: /var/home/core/.local/share/containers/storage
  graphRootAllocated: 106825756672
  graphRootUsed: 2427838464
  graphStatus:
    Backing Filesystem: xfs
    Native Overlay Diff: "true"
    Supports d_type: "true"
    Using metacopy: "false"
  imageCopyTmpDir: /var/tmp
  imageStore:
    number: 11
  runRoot: /run/user/502/containers
  volumePath: /var/home/core/.local/share/containers/storage/volumes
version:
  APIVersion: 4.2.0
  Built: 1660228991
  BuiltTime: Thu Aug 11 07:43:11 2022
  GitCommit: ""
  GoVersion: go1.18.4
  Os: linux
  OsArch: linux/arm64
  Version: 4.2.0

Package info (e.g. output of rpm -q podman or apt list podman):

❯ brew info podman
podman: stable 4.2.0 (bottled), HEAD
Tool for managing OCI containers and pods
https://podman.io/
/opt/homebrew/Cellar/podman/4.2.0 (178 files, 48MB) *
  Poured from bottle on 2022-08-11 at 18:04:03
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/podman.rb
License: Apache-2.0
==> Dependencies
Build: go-md2man ✘, go@1.18 ✘
Required: qemu ✔
==> Options
--HEAD
	Install HEAD version
==> Caveats
zsh completions have been installed to:
  /opt/homebrew/share/zsh/site-functions
==> Analytics
install: 20,983 (30 days), 57,715 (90 days), 194,460 (365 days)
install-on-request: 20,594 (30 days), 56,984 (90 days), 193,671 (365 days)
build-error: 40 (30 days)

Have you tested with the latest version of Podman and have you checked the Podman Troubleshooting Guide? (https://github.com/containers/podman/blob/main/troubleshooting.md)

Yes