From: Rusty Russell <rusty@rustcorp.com.au>
Date: Mon, 21 Jan 2013 06:33:02 +0000 (+1030)
Subject: module: printk message when module signature fail taints kernel.
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=64748a2c9062da0c32b59c1b368a86fc4613b1e1;p=deliverable%2Flinux.git

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>
---

diff --git a/kernel/module.c b/kernel/module.c
index eab08274ec9b..e69a5a68766f 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -3192,8 +3192,13 @@ again:
 
 #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. */