module,bug: Add TAINT_OOT_MODULE flag for modules not built in-tree

Use of the GPL or a compatible licence doesn't necessarily make the code
any good.  We already consider staging modules to be suspect, and this
should also be true for out-of-tree modules which may receive very
little review.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Reviewed-by: Dave Jones <davej@redhat.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (patched oops-tracing.txt)
diff --git a/kernel/module.c b/kernel/module.c
index 3c55096..ef8cb70 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2487,6 +2487,9 @@
 		return -ENOEXEC;
 	}
 
+	if (!get_modinfo(info, "intree"))
+		add_taint_module(mod, TAINT_OOT_MODULE);
+
 	if (get_modinfo(info, "staging")) {
 		add_taint_module(mod, TAINT_CRAP);
 		printk(KERN_WARNING "%s: module is from the staging directory,"
@@ -3255,6 +3258,8 @@
 		buf[bx++] = '(';
 		if (mod->taints & (1 << TAINT_PROPRIETARY_MODULE))
 			buf[bx++] = 'P';
+		else if (mod->taints & (1 << TAINT_OOT_MODULE))
+			buf[bx++] = 'O';
 		if (mod->taints & (1 << TAINT_FORCED_MODULE))
 			buf[bx++] = 'F';
 		if (mod->taints & (1 << TAINT_CRAP))