audit: log module name on init_module

This adds a new auxiliary record MODULE_INIT to the SYSCALL event.

We get finit_module for free since it made most sense to hook this in to
load_module().

https://github.com/linux-audit/audit-kernel/issues/7
https://github.com/linux-audit/audit-kernel/wiki/RFE-Module-Load-Record-Format

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Acked-by: Jessica Yu <jeyu@redhat.com>
[PM: corrected links in the commit description]
Signed-off-by: Paul Moore <paul@paul-moore.com>
diff --git a/kernel/audit.h b/kernel/audit.h
index 431444c..144b7eb 100644
--- a/kernel/audit.h
+++ b/kernel/audit.h
@@ -199,6 +199,9 @@
 		struct {
 			int			argc;
 		} execve;
+		struct {
+			char			*name;
+		} module;
 	};
 	int fds[2];
 	struct audit_proctitle proctitle;