1 files changed, 4 insertions, 1 deletions
diff --git a/libgo/go/syscall/sockcmsg_linux.go b/libgo/go/syscall/sockcmsg_linux.go
index a2e26a1f47..4cb9075ba8 100644
--- a/libgo/go/syscall/sockcmsg_linux.go
+++ b/libgo/go/syscall/sockcmsg_linux.go
@@ -1,4 +1,4 @@
-// Copyright 2011 The Go Authors.  All rights reserved.
+// Copyright 2011 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
@@ -31,6 +31,9 @@ func ParseUnixCredentials(m *SocketControlMessage) (*Ucred, error) {
 	if m.Header.Type != SCM_CREDENTIALS {
 		return nil, EINVAL
 	}
+	if uintptr(len(m.Data)) < unsafe.Sizeof(Ucred{}) {
+		return nil, EINVAL
+	}
 	ucred := *(*Ucred)(unsafe.Pointer(&m.Data[0]))
 	return &ucred, nil
 }