__fortify_realpath() should trap if PATH_MAX is not defined

This is currently done only if the pointer is non-NULL.

1 files changed, 4 insertions, 0 deletions

diff --git a/include/stdlib.h b/include/stdlib.h
index 2948b54..f3a5ccd 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -19,9 +19,13 @@ __fortify_realpath(const char *path, char *resolved)
         size_t bos;
 
         if (resolved) {
+#ifndef PATH_MAX
+                __builtin_trap();
+#else
                 bos = __builtin_object_size(resolved, 0);
                 if (PATH_MAX > bos)
                         __builtin_trap();
+#endif
         }
         return realpath(path, resolved);
 }