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 | 6 ++++++ kernel/module.c | 10 ++++++++++ 2 files changed, 16 insertions(+) diff --git a/include/linux/module.h b/include/linux/module.h index 7ffe0851d244..3da68fd1f657 100644 --- a/include/linux/module.h +++ b/include/linux/module.h @@ -515,6 +515,8 @@ static inline bool module_requested_async_probing(struct module *module) return module && module->async_probe_requested; } +extern bool secure_modules(void); + #else /* !CONFIG_MODULES... */ /* Given an address, look for it in the exception tables. */ @@ -631,6 +633,10 @@ static inline bool module_requested_async_probing(struct module *module) return false; } +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 f80a97f7da1f..5d3e6c6191fa 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -3925,3 +3925,13 @@ 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);