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From 0f6eec5ca124baf1372fb4edeacd11a002378f5e Mon Sep 17 00:00:00 2001
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From: Matthew Garrett <matthew.garrett@nebula.com>
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Date: Fri, 9 Aug 2013 17:58:15 -0400
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Subject: [PATCH 01/20] Add secure_modules() call
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Provide a single call to allow kernel code to determine whether the system
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has been configured to either disable module loading entirely or to load
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only modules signed with a trusted key.
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Bugzilla: N/A
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Upstream-status: Fedora mustard. Replaced by securelevels, but that was nak'd
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Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
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---
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include/linux/module.h | 6 ++++++
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kernel/module.c | 10 ++++++++++
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2 files changed, 16 insertions(+)
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diff --git a/include/linux/module.h b/include/linux/module.h
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index 3daf2b3..082298a 100644
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--- a/include/linux/module.h
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+++ b/include/linux/module.h
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@@ -655,6 +655,8 @@ static inline bool is_livepatch_module(struct module *mod)
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}
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#endif /* CONFIG_LIVEPATCH */
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+extern bool secure_modules(void);
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+
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#else /* !CONFIG_MODULES... */
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/* Given an address, look for it in the exception tables. */
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@@ -771,6 +773,10 @@ static inline bool module_requested_async_probing(struct module *module)
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return false;
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}
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+static inline bool secure_modules(void)
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+{
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+ return false;
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+}
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#endif /* CONFIG_MODULES */
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#ifdef CONFIG_SYSFS
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diff --git a/kernel/module.c b/kernel/module.c
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index 5f71aa6..3c38496 100644
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--- a/kernel/module.c
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+++ b/kernel/module.c
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@@ -4199,3 +4199,13 @@ void module_layout(struct module *mod,
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}
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EXPORT_SYMBOL(module_layout);
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#endif
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+
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+bool secure_modules(void)
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+{
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+#ifdef CONFIG_MODULE_SIG
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+ return (sig_enforce || modules_disabled);
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+#else
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+ return modules_disabled;
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+#endif
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+}
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+EXPORT_SYMBOL(secure_modules);
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--
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2.5.5
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