Bug 1984457

Summary: SELinux is preventing bash from 'execute' accesses on the file install-toolchains.sh.
Product: [Fedora] Fedora Reporter: michael <michael>
Component: selinux-policyAssignee: Zdenek Pytela <zpytela>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 34CC: dwalsh, grepl.miroslav, lvrabec, mmalik, omosnace, vmojzis, zpytela
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard: abrt_hash:75ecfeccc39109e5eb6ff7f11147825644c837b9f20bbe46b53778d1f399200c;VARIANT_ID=workstation;
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-07-21 17:20:04 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description michael@mcdonnell.dk 2021-07-21 13:43:06 UTC 
Description of problem:
1. Open a terminal
2. Clone the Delta Chat Android client source code from https://github.com/deltachat/deltachat-android
3. Change the directory to the cloned source code
4. Build the image using the following command:
`
podman build --build-arg UID=$(id -u) --build-arg GID=$(id -g) . -t deltachat-android
`
5. Run the image using the following command:
`
podman run --userns=keep-id -it --name deltachat -v $(pwd):/home/app -w /home/app localhost/deltachat-android
`
6. Within the container, install the toolchain:
`
scripts/install-toolchains.sh
`
7. Notice that you get the error message "bash: scripts/install-toolchains.sh: Permission denied".
8. Notice that you get a notification from the SELinux Alert Browser.

You can exit the container with by typing `exit`.
SELinux is preventing bash from 'execute' accesses on the file install-toolchains.sh.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that bash should be allowed execute access on the install-toolchains.sh file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'bash' --raw | audit2allow -M my-bash
# semodule -X 300 -i my-bash.pp

Additional Information:
Source Context                system_u:system_r:container_t:s0:c458,c759
Target Context                unconfined_u:object_r:user_home_t:s0
Target Objects                install-toolchains.sh [ file ]
Source                        bash
Source Path                   bash
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
SELinux Policy RPM            selinux-policy-targeted-34.14-1.fc34.noarch
Local Policy RPM              selinux-policy-targeted-34.14-1.fc34.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 5.12.15-300.fc34.x86_64 #1 SMP Wed
                              Jul 7 19:46:50 UTC 2021 x86_64 x86_64
Alert Count                   1
First Seen                    2021-07-21 06:26:31 PDT
Last Seen                     2021-07-21 06:26:31 PDT
Local ID                      a8a1523e-457e-4f7b-af73-fcc28802d01e

Raw Audit Messages
type=AVC msg=audit(1626873991.765:820): avc:  denied  { execute } for  pid=6430 comm="bash" name="install-toolchains.sh" dev="sdc3" ino=378832 scontext=system_u:system_r:container_t:s0:c458,c759 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=0


Hash: bash,container_t,user_home_t,file,execute

Version-Release number of selected component:
selinux-policy-targeted-34.14-1.fc34.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.15.2
hashmarkername: setroubleshoot
kernel:         5.12.15-300.fc34.x86_64
type:           libreport
Comment 1 michael@mcdonnell.dk 2021-07-21 14:05:13 UTC 
I follow the instructions to create a local policy module but then I get a "read, open" error instead. I then created another local policy module but then got an "execute_no_trans" error instead. I added yet another module but then cat failed instead:

`
cat: jni/deltachat-core-rust/rust-toolchain: Permission denied
`

Which is where I finally gave up.
Comment 2 Ondrej Mosnacek 2021-07-21 14:29:17 UTC 
Accessing files from the host inside a container [confined by SELinux] requires that the files are first relabeled to container_file_t. In your case, using the "z" volume option when invoking `podman run` should take care of it automatically:

podman run --userns=keep-id -it --name deltachat -v $(pwd):/home/app:z -w /home/app localhost/deltachat-android
Comment 3 michael@mcdonnell.dk 2021-07-21 16:50:34 UTC 
Thank you very much Ondrej! That worked!