1 files changed, 8 insertions, 0 deletions
diff --git a/clang/lib/Analysis/UnsafeBufferUsage.cpp b/clang/lib/Analysis/UnsafeBufferUsage.cpp
index 40dff7e..f4ead3d 100644
--- a/clang/lib/Analysis/UnsafeBufferUsage.cpp
+++ b/clang/lib/Analysis/UnsafeBufferUsage.cpp
@@ -1986,6 +1986,14 @@ public:
     const auto *FD = dyn_cast<FunctionDecl>(CE->getDirectCallee());
     if (!FD)
       return false;
+
+    bool IsGlobalAndNotInAnyNamespace =
+        FD->isGlobal() && !FD->getEnclosingNamespaceContext()->isNamespace();
+
+    // A libc function must either be in the std:: namespace or a global
+    // function that is not in any namespace:
+    if (!FD->isInStdNamespace() && !IsGlobalAndNotInAnyNamespace)
+      return false;
     auto isSingleStringLiteralArg = false;
     if (CE->getNumArgs() == 1) {
       isSingleStringLiteralArg =