podman: exec not signaling child processes upon receiving termination signal

[agorgl]

Issue Description

Processes inside a container spawned by podman exec invocations are not killed when the podman exec invocation in the host that spawned them receives a kill signal itself

Steps to reproduce the issue

Steps to reproduce the issue

1. Run a simple container using podman run --rm -it --name alpine alpine
2. Watch the processes in the container using watch -n 1 ps aux
3. Exec a command from the host using podman exec -it alpine /bin/sh -c 'sleep 1000'
4. Find the podman exec pid in the host using ps aux | grep podman | grep sleep and kill it using kill <pid>

Describe the results you received

Watch as the podman exec invocation gets killed in the host, but the process inside the container is not signaled and keeps running.

Describe the results you expected

For the process execed by podman exec to be signaled to terminate upon killing the podman exec process itself

podman info output

❯ podman version                                                                                                                                                                 1m 13s
Client:       Podman Engine
Version:      5.0.2
API Version:  5.0.2
Go Version:   go1.22.2
Git Commit:   3304dd95b8978a8346b96b7d43134990609b3b29-dirty
Built:        Thu Apr 18 14:13:19 2024
OS/Arch:      linux/amd64

Podman in a container

No

Privileged Or Rootless

Rootless

Upstream Latest Release

Yes

Additional environment details

No response

Additional information

No response

[Luap99]

Duplicate of #19486