linux-kernel - [PATCH v2 0/4] modsign enhancement

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Message-Id: <1520483223-6596-1-git-send-email-zhang.jia@linux.alibaba.com>
Date:   Thu,  8 Mar 2018 12:26:59 +0800
From:   Jia Zhang <zhang.jia@...ux.alibaba.com>
To:     jeyu@...nel.org
Cc:     linux-kernel@...r.kernel.org, zhang.jia@...ux.alibaba.com
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

Changelog:
v2:
- Support to disable validity enforcement in runtime.