Docker "standard_init_linux: exec user process caused permission denied" in CI

When the runtime tries to exec the container entrypoint and the file lacks the executable bit (or a script has a bad interpreter line), the kernel returns EACCES and the container dies at startup with "exec user process caused: permission denied".

What this error means

A container exits immediately with standard_init_linux.go:228: exec user process caused: permission denied.

standard_init_linux.go:228: exec user process caused: permission denied

Common causes

The entrypoint file is not executable

A COPYed script or binary without the +x bit cannot be exec'd.

A script copied from a non-exec host file

Files copied from Windows or an archive often lose the executable bit.

A bad shebang on a wrapper script

A shebang pointing at an interpreter that is not present can surface as a permission/exec failure.

How to fix it

Set the executable bit during build

1. Use COPY --chmod (BuildKit) or a RUN chmod to make the entrypoint executable.

COPY --chmod=755 entrypoint.sh /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]

Fix the interpreter line for scripts

1. Ensure the shebang points at a shell present in the image.

#!/bin/sh
exec "$@"

How to prevent it

• Mark entrypoints executable at build time with --chmod or RUN chmod.
• Verify the shebang interpreter exists in the target base image.

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