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Subject[PATCH v2 0/4] modsign enhancement
This patch series allows to disable module validity enforcement
in runtime through /sys/kernel/security/modsign/enforce interface.

Assuming CONFIG_MODULE_SIG_FORCE=y, here are the instructions to
disable the validity enforcement.

# cat /sys/kernel/security/modsign/enforce
# echo -n 0 > data
# openssl smime -sign -nocerts -noattr -binary -in data \
-inkey <system_trusted_key> -signer <cert> -outform der \
-out /sys/kernel/security/modsign/enforce

Now enable enforcement again on demand.

# echo 1 > /sys/kernel/security/modsign/enforce

- Support to disable validity enforcement in runtime.

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