Wrong permissions on idmapped volumes created before starting the container when container-dir does not exist #22228
Description
Issue Description
Same as #21608:
This is basically the same issue as #16724:
podman still chowns the volume to the containers uid/gid though which causes the container to not be able to use it
The fix for said issue (#16739), only disable chowing if the volume does not exist, but if the volume is created prior to starting the container (e.g. with
podman volume create), the volume is chowned and the permissions are wrong.
Unfortunately, the fix (#21611) does not work if the container-dir does not exist in the container.
Steps to reproduce the issue
Steps to reproduce the issue
- Run
podman volume create test(asroot) - Run
podman run --rm --userns=auto -v test:/test:idmap archlinux touch /test/123(asroot)
Describe the results you received
The process is unable to create the file, due to wrong permissions.
touch: cannot touch '/test/123': Permission denied
Describe the results you expected
The process being able to create the file.
podman info output
host:
arch: amd64
buildahVersion: 1.35.1
cgroupControllers:
- cpuset
- cpu
- io
- memory
- hugetlb
- pids
- rdma
- misc
cgroupManager: systemd
cgroupVersion: v2
conmon:
package: /usr/bin/conmon is owned by conmon 1:2.1.10-1
path: /usr/bin/conmon
version: 'conmon version 2.1.10, commit: 2dcd736e46ded79a53339462bc251694b150f870'
cpuUtilization:
idlePercent: 87.44
systemPercent: 2.8
userPercent: 9.76
cpus: 8
databaseBackend: boltdb
distribution:
distribution: arch
version: unknown
eventLogger: journald
freeLocks: 2043
hostname: foo
idMappings:
gidmap: null
uidmap: null
kernel: 6.7.9-arch1-1
linkmode: dynamic
logDriver: journald
memFree: 2308268032
memTotal: 16627310592
networkBackend: netavark
networkBackendInfo:
backend: netavark
dns:
package: Unknown
package: /usr/lib/podman/netavark is owned by netavark 1.10.3-1
path: /usr/lib/podman/netavark
version: netavark 1.10.3
ociRuntime:
name: crun
package: /usr/bin/crun is owned by crun 1.14.4-1
path: /usr/bin/crun
version: |-
crun version 1.14.4
commit: a220ca661ce078f2c37b38c92e66cf66c012d9c1
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: /usr/bin/pasta is owned by passt 2024_03_26.4988e2b-1
version: |
pasta 2024_03_26.4988e2b
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: false
path: /run/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: false
seccompEnabled: true
seccompProfilePath: /etc/containers/seccomp.json
selinuxEnabled: false
serviceIsRemote: false
slirp4netns:
executable: /usr/bin/slirp4netns
package: /usr/bin/slirp4netns is owned by slirp4netns 1.2.3-1
version: |-
slirp4netns version 1.2.3
commit: c22fde291bb35b354e6ca44d13be181c76a0a432
libslirp: 4.7.0
SLIRP_CONFIG_VERSION_MAX: 4
libseccomp: 2.5.5
swapFree: 3983962112
swapTotal: 4294963200
uptime: 389h 8m 30.00s (Approximately 16.21 days)
variant: ""
plugins:
authorization: null
log:
- k8s-file
- none
- passthrough
- journald
network:
- bridge
- macvlan
- ipvlan
volume:
- local
registries: {}
store:
configFile: /etc/containers/storage.conf
containerStore:
number: 0
paused: 0
running: 0
stopped: 0
graphDriverName: overlay
graphOptions:
overlay.mountopt: nodev
graphRoot: /var/lib/containers/storage
graphRootAllocated: 157393113088
graphRootUsed: 146208415744
graphStatus:
Backing Filesystem: extfs
Native Overlay Diff: "false"
Supports d_type: "true"
Supports shifting: "true"
Supports volatile: "true"
Using metacopy: "true"
imageCopyTmpDir: /var/tmp
imageStore:
number: 2
runRoot: /run/containers/storage
transientStore: false
volumePath: /var/lib/containers/storage/volumes
version:
APIVersion: 5.0.0
Built: 1711060217
BuiltTime: Thu Mar 21 23:30:17 2024
GitCommit: e71ec6f1d94d2d97fb3afe08aae0d8adaf8bddf0-dirty
GoVersion: go1.22.1
Os: linux
OsArch: linux/amd64
Version: 5.0.0Podman in a container
No
Privileged Or Rootless
Privileged
Upstream Latest Release
Yes
Additional environment details
N/A
Additional information
I noticed this while trying to use the "new" :idmap option (as described in #16250) with gitlab-runner, which creates the volumes first and then uses them (and apparently the container-dir does not exist in the container).