Synchronized file shares modifies file permissions

[Devon-Dickson]

Description

An automatically generated Synchronized file share was created for a volume that contains a private key managed by Teleport. Every time I run tsh login the key in the docker container is granted group and global read access. After deleting the file share in Docker Desktop settings, this undesired behavior no longer exists.

Reproduce

1. tsh login
2. Note that the private key on the host file system has just owner read/write permissions.
3. Start docker container
4. Note that the private key inside the docker container now also has group and global read permissions.

Expected behavior

The private key in the docker container should have the same permissions as on the host system.

docker version

Client:
Version: 27.2.0
API version: 1.47
Go version: go1.21.13
Git commit: 3ab4256
Built: Tue Aug 27 14:14:45 2024
OS/Arch: darwin/arm64
Context: desktop-linux

Server: Docker Desktop 4.34.3 (170107)
Engine:
Version: 27.2.0
API version: 1.47 (minimum version 1.24)
Go version: go1.21.13
Git commit: 3ab5c7d
Built: Tue Aug 27 14:15:41 2024
OS/Arch: linux/arm64
Experimental: false
containerd:
Version: 1.7.20
GitCommit: 8fc6bcff51318944179630522a095cc9dbf9f353
runc:
Version: 1.1.13
GitCommit: v1.1.13-0-g58aa920
docker-init:
Version: 0.19.0
GitCommit: de40ad0

docker info

Client:
Version: 27.2.0
Context: desktop-linux
Debug Mode: false
Plugins:
buildx: Docker Buildx (Docker Inc.)
Version: v0.16.2-desktop.1
Path: /Users/devon/.docker/cli-plugins/docker-buildx
compose: Docker Compose (Docker Inc.)
Version: v2.29.2-desktop.2
Path: /Users/devon/.docker/cli-plugins/docker-compose
debug: Get a shell into any image or container (Docker Inc.)
Version: 0.0.34
Path: /Users/devon/.docker/cli-plugins/docker-debug
desktop: Docker Desktop commands (Alpha) (Docker Inc.)
Version: v0.0.15
Path: /Users/devon/.docker/cli-plugins/docker-desktop
dev: Docker Dev Environments (Docker Inc.)
Version: v0.1.2
Path: /Users/devon/.docker/cli-plugins/docker-dev
extension: Manages Docker extensions (Docker Inc.)
Version: v0.2.25
Path: /Users/devon/.docker/cli-plugins/docker-extension
feedback: Provide feedback, right in your terminal! (Docker Inc.)
Version: v1.0.5
Path: /Users/devon/.docker/cli-plugins/docker-feedback
init: Creates Docker-related starter files for your project (Docker Inc.)
Version: v1.3.0
Path: /Users/devon/.docker/cli-plugins/docker-init
sbom: View the packaged-based Software Bill Of Materials (SBOM) for an image (Anchore Inc.)
Version: 0.6.0
Path: /Users/devon/.docker/cli-plugins/docker-sbom
scout: Docker Scout (Docker Inc.)
Version: v1.13.0
Path: /Users/devon/.docker/cli-plugins/docker-scout

Server:
Containers: 4
Running: 3
Paused: 0
Stopped: 1
Images: 4
Server Version: 27.2.0
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Using metacopy: false
Native Overlay Diff: true
userxattr: false
Logging Driver: json-file
Cgroup Driver: cgroupfs
Cgroup Version: 2
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
Swarm: inactive
Runtimes: io.containerd.runc.v2 runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 8fc6bcff51318944179630522a095cc9dbf9f353
runc version: v1.1.13-0-g58aa920
init version: de40ad0
Security Options:
seccomp
Profile: unconfined
cgroupns
Kernel Version: 6.10.4-linuxkit
Operating System: Docker Desktop
OSType: linux
Architecture: aarch64
CPUs: 10
Total Memory: 23.44GiB
Name: docker-desktop
ID: 2aa5cbfa-c768-45c3-bd1b-acb23acb6378
Docker Root Dir: /var/lib/docker
Debug Mode: false
HTTP Proxy: http.docker.internal:3128
HTTPS Proxy: http.docker.internal:3128
No Proxy: hubproxy.docker.internal
Labels:
com.docker.desktop.address=unix:///Users/devon/Library/Containers/com.docker.docker/Data/docker-cli.sock
Experimental: false
Insecure Registries:
hubproxy.docker.internal:5555
127.0.0.0/8
Live Restore Enabled: false

WARNING: daemon is not using the default seccomp profile

Diagnostics ID

0D0F959B-2A33-422D-A844-DE8D4F0FF6FC/20241009170442

Additional Info

No response