From 31a87d75f15c7acd9470fab9ceb129c0a255871f Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <sezeroz@gmail.com>
Date: Tue, 30 Jul 2019 21:30:24 +0300
Subject: [PATCH] Fixed bug 4538 - validate image size when loading BMP files

---
 src/video/SDL_bmp.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/video/SDL_bmp.c b/src/video/SDL_bmp.c
index 758d4bbc4..6cadc8a55 100644
--- a/src/video/SDL_bmp.c
+++ b/src/video/SDL_bmp.c
@@ -143,6 +143,11 @@ SDL_Surface * SDL_LoadBMP_RW (SDL_RWops *src, int freesrc)
 	(void) biYPelsPerMeter;
 	(void) biClrImportant;
 
+	if (biWidth <= 0 || biHeight == 0) {
+		SDL_SetError("BMP file with bad dimensions (%dx%d)", biWidth, biHeight);
+		was_error = SDL_TRUE;
+		goto done;
+	}
 	if (biHeight < 0) {
 		topDown = SDL_TRUE;
 		biHeight = -biHeight;