From 7a1d02083dcda0a6349f684d8dadd81fcdc546f2 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Mon, 2 Mar 2026 09:40:53 -0800
Subject: [PATCH] Added surface validation to SDL_DuplicateSurface()

(cherry picked from commit 73b13728de23accbecba03bdbf5966221d7d4456)
---
 src/video/SDL_surface.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/video/SDL_surface.c b/src/video/SDL_surface.c
index 33d76d2737..97b0381de5 100644
--- a/src/video/SDL_surface.c
+++ b/src/video/SDL_surface.c
@@ -2211,6 +2211,11 @@ SDL_Surface *SDL_RotateSurface(SDL_Surface *surface, float angle)
 
 SDL_Surface *SDL_DuplicateSurface(SDL_Surface *surface)
 {
+    CHECK_PARAM(!SDL_SurfaceValid(surface)) {
+        SDL_InvalidParamError("surface");
+        return NULL;
+    }
+
     return SDL_ConvertSurfaceAndColorspace(surface, surface->format, surface->palette, surface->colorspace, surface->props);
 }