vm: enable session keyrings in both guest kernels - #36
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A sandbox test executed inside actiond starts its bundled minijail binary, but the guest kernel does not implement the key management system calls: ```text libminijail[10]: keyctl(KEYCTL_JOIN_SESSION_KEYRING) failed: Function not implemented libminijail[9]: child process 10 received signal 6 ``` Enable Linux key retention support in both guest kernel configurations. Minijail's existing `-w` option can then create its isolated anonymous session keyring without requiring any additional runtime packages. The exact failure was reproduced by a real remote execution of `//project/oai_sandbox:pytest -k test_seccomp_default_action`, after enabling Landlock and providing the consumer's source-built `libcap.so.2`. Both independent fragments were resolved through the repository's actual Linux 6.18.2 Kconfig parser in `allnoconfig` mode, verifying `CONFIG_KEYS=y` and its automatically selected `CONFIG_ASSOCIATIVE_ARRAY=y` on ARM64 and x86_64.
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A sandbox test executed inside actiond starts its bundled minijail binary,
but the guest kernel does not implement the key management system calls:
Enable Linux key retention support in both guest kernel configurations.
Minijail's existing
-woption can then create its isolated anonymous sessionkeyring without requiring any additional runtime packages.
The exact failure was reproduced by a real remote execution of
//project/oai_sandbox:pytest -k test_seccomp_default_action, after enablingLandlock and providing the consumer's source-built
libcap.so.2.Both independent fragments were resolved through the repository's actual Linux
6.18.2 Kconfig parser in
allnoconfigmode, verifyingCONFIG_KEYS=yand itsautomatically selected
CONFIG_ASSOCIATIVE_ARRAY=yon ARM64 and x86_64.