am a1a22b57: am e67b5848: am 4956c0fe: am 5b85b1d4: libutils: fix overflow in String8::allocFromUTF8

* commit 'a1a22b5736d5ad71531fd07d5c4103585e8e8977':
  libutils: fix overflow in String8::allocFromUTF8

libutils/String8.cpp

diff --git a/libutils/String8.cpp b/libutils/String8.cpp
index 9092cbc..5741653 100644
--- a/libutils/String8.cpp
+++ b/libutils/String8.cpp
@@ -78,6 +78,9 @@
 static char* allocFromUTF8(const char* in, size_t len)
 {
     if (len > 0) {
+        if (len == SIZE_MAX) {
+            return NULL;
+        }
         SharedBuffer* buf = SharedBuffer::alloc(len+1);
         ALOG_ASSERT(buf, "Unable to allocate shared buffer");
         if (buf) {