bdlsb_overflowmemoutstreambuf: fix ubsan (#4954)

bloomberg · Sep 16, 2024 · 01fbfc1 · 01fbfc1
1 parent 75a1143
commit 01fbfc1
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/groups/bdl/bdlsb/bdlsb_overflowmemoutstreambuf.cpp b/groups/bdl/bdlsb/bdlsb_overflowmemoutstreambuf.cpp
@@ -32,7 +32,7 @@ void OverflowMemOutStreamBuf::grow(bsl::size_t numBytes)
     char *newBuffer =
                     reinterpret_cast<char *>(d_allocator_p->allocate(newSize));
 
-    if (numBytes) {
+    if (numBytes && d_overflowBufferSize) {
         bsl::memcpy(newBuffer, d_overflowBuffer_p, d_overflowBufferSize);
     }
     d_allocator_p->deallocate(d_overflowBuffer_p);