diff --git a/llvm/lib/Support/Unix/Path.inc b/llvm/lib/Support/Unix/Path.inc
index e2aece49cbc52a545eb8d908dba07478ee7ed50f..7869dc086e969b01eb9e1d91d6e743d0922fc54e 100644
--- a/llvm/lib/Support/Unix/Path.inc
+++ b/llvm/lib/Support/Unix/Path.inc
@@ -1429,8 +1429,12 @@ static const char *getEnvTempDir() {
   // variable.
   const char *EnvironmentVariables[] = {"TMPDIR", "TMP", "TEMP", "TEMPDIR"};
   for (const char *Env : EnvironmentVariables) {
-    if (const char *Dir = std::getenv(Env))
+    if (const char *Dir = std::getenv(Env)) {
+      if(std::strlen(Dir) > NAME_MAX) {
+        continue;
+      }
       return Dir;
+    }
   }
 
   return nullptr;