diff --git a/[refs] b/[refs]
index f72db4cd9453..0b16dab20023 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d1c7d97ad58836affde6e39980b96527510b572e
+refs/heads/master: aed976475bff939672b0e21595839c445dcec0fa
diff --git a/trunk/fs/file.c b/trunk/fs/file.c
index 0f1bda4bebfa..d3b5fa80b71b 100644
--- a/trunk/fs/file.c
+++ b/trunk/fs/file.c
@@ -922,6 +922,9 @@ SYSCALL_DEFINE3(dup3, unsigned int, oldfd, unsigned int, newfd, int, flags)
 	if ((flags & ~O_CLOEXEC) != 0)
 		return -EINVAL;
 
+	if (unlikely(oldfd == newfd))
+		return -EINVAL;
+
 	if (newfd >= rlimit(RLIMIT_NOFILE))
 		return -EMFILE;