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Automatic merge from submit-queue (batch tested with PRs 49651, 49707, 49662, 47019, 49747) Add support for `no_new_privs` via AllowPrivilegeEscalation **What this PR does / why we need it**: Implements kubernetes/community#639 Fixes #38417 Adds `AllowPrivilegeEscalation` and `DefaultAllowPrivilegeEscalation` to `PodSecurityPolicy`. Adds `AllowPrivilegeEscalation` to container `SecurityContext`. Adds the proposed behavior to `kuberuntime`, `dockershim`, and `rkt`. Adds a bunch of unit tests to ensure the desired default behavior and that when `DefaultAllowPrivilegeEscalation` is explicitly set. Tests pass locally with docker and rkt runtimes. There are also a few integration tests with a `setuid` binary for sanity. **Release note**: ```release-note Adds AllowPrivilegeEscalation to control whether a process can gain more privileges than it's parent process ``` |
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