From 4f51d32e9f14071e65c46f3f28e89304a809d3e1 Mon Sep 17 00:00:00 2001 From: Matthew Garrett Date: Fri, 9 Aug 2013 17:58:15 -0400 Subject: [PATCH] Add secure_modules() call Provide a single call to allow kernel code to determine whether the system has been configured to either disable module loading entirely or to load only modules signed with a trusted key. Bugzilla: N/A Upstream-status: Fedora mustard. Replaced by securelevels, but that was nak'd Signed-off-by: Matthew Garrett --- include/linux/module.h | 7 +++++++ kernel/module.c | 10 ++++++++++ 2 files changed, 17 insertions(+) diff --git a/include/linux/module.h b/include/linux/module.h index 71f282a4e307..341a73ecea2e 100644 --- a/include/linux/module.h +++ b/include/linux/module.h @@ -516,6 +516,8 @@ int unregister_module_notifier(struct notifier_block *nb); extern void print_modules(void); +extern bool secure_modules(void); + #else /* !CONFIG_MODULES... */ /* Given an address, look for it in the exception tables. */ @@ -626,6 +628,11 @@ static inline int unregister_module_notifier(struct notifier_block *nb) static inline void print_modules(void) { } + +static inline bool secure_modules(void) +{ + return false; +} #endif /* CONFIG_MODULES */ #ifdef CONFIG_SYSFS diff --git a/kernel/module.c b/kernel/module.c index 03214bd288e9..1f7b4664300e 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -3842,3 +3842,13 @@ void module_layout(struct module *mod, } EXPORT_SYMBOL(module_layout); #endif + +bool secure_modules(void) +{ +#ifdef CONFIG_MODULE_SIG + return (sig_enforce || modules_disabled); +#else + return modules_disabled; +#endif +} +EXPORT_SYMBOL(secure_modules); -- 1.9.3