From: Jia Zhang <zhang.jia@linux.alibaba.com>
To: jeyu@kernel.org
Cc: linux-kernel@vger.kernel.org, zhang.jia@linux.alibaba.com
Subject: [PATCH v3 0/3][RESEND] modsign enhancement
Date: Sat, 24 Mar 2018 10:59:46 +0800 [thread overview]
Message-ID: <1521860389-19262-1-git-send-email-zhang.jia@linux.alibaba.com> (raw)
This patch series allows to disable module validity enforcement
in runtime through the control switch located in securityfs.
In order to keep /sys/module/module/parameters/sig_enforce simple,
the disablement switch is located at
/sys/kernel/security/modsign/disable_enforce.
Assuming CONFIG_MODULE_SIG_FORCE=n, here are the instructions to
test this control switch.
# cat /sys/module/module/parameters/sig_enforce
N
# echo 1 > /sys/module/module/parameters/sig_enforce
# cat /sys/module/module/parameters/sig_enforce
Y
# echo -n 0 > no_sig_enforce
# openssl smime -sign -nocerts -noattr -binary -in no_sig_enforce \
-inkey <system_trusted_key> -signer <cert> -outform der \
-out /sys/kernel/security/modsign/disable_enforce
# cat /sys/module/module/parameters/sig_enforce
N
Changelog:
v3:
- The control switch now doesn't support showing the status of sig_enforce.
v2:
- Support to disable validity enforcement in runtime.
next reply other threads:[~2018-03-24 2:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-24 2:59 Jia Zhang [this message]
2018-03-24 2:59 ` [PATCH 1/3] module: Do not access sig_enforce directly Jia Zhang
2018-03-24 2:59 ` [PATCH 2/3] module: Create the entry point initialize_module() Jia Zhang
2018-03-24 2:59 ` [PATCH 3/3] module: Support to disable validity enforcement in runtime Jia Zhang
2018-03-27 22:11 ` [PATCH v3 0/3][RESEND] modsign enhancement Jessica Yu
2018-03-28 1:02 ` Jia Zhang
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