module: printk message when module signature fail taints kernel.

Reported-by: Chris Samuel <chris@csamuel.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
git-mirror · Jan 21, 2013 · 64748a2 · 64748a2
1 parent 9a92841
commit 64748a2
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/kernel/module.c b/kernel/module.c
@@ -3192,8 +3192,13 @@ static int load_module(struct load_info *info, const char __user *uargs,
 
 #ifdef CONFIG_MODULE_SIG
 	mod->sig_ok = info->sig_ok;
-	if (!mod->sig_ok)
+	if (!mod->sig_ok) {
+		printk_once(KERN_NOTICE
+			    "%s: module verification failed: signature and/or"
+			    " required key missing - tainting kernel\n",
+			    mod->name);
 		add_taint_module(mod, TAINT_FORCED_MODULE);
+	}
 #endif
 
 	/* Now module is in final location, initialize linked lists, etc. */