1 files changed, 2 insertions, 1 deletions

diff --git a/include/compat/dirent_msvc.h b/include/compat/dirent_msvc.h
index 67f295f..e8a0956 100644
--- a/include/compat/dirent_msvc.h
+++ b/include/compat/dirent_msvc.h
@@ -165,7 +165,8 @@ _wopendir(const wchar_t *dirname)
                 n = GetFullPathNameW(dirname, 0, NULL, NULL);
 
                 /* Allocate room for absolute directory name and search pattern */
-                dirp->patt =(wchar_t*) malloc(sizeof(wchar_t) * n + 16);
+                if (n <= (SIZE_MAX - 16) / sizeof(wchar_t))
+                        dirp->patt =(wchar_t*) malloc(sizeof(wchar_t) * n + 16);
                 if (dirp->patt) {
 
                         /*