1From 97fefd050976bbbfca9608499f6a7d9fb86e70db Mon Sep 17 00:00:00 2001
2From: Sam Lantinga <slouken@libsdl.org>
3Date: Tue, 30 Jul 2019 11:00:00 -0700
4Subject: [PATCH] Fixed bug 4538 - validate image size when loading BMP files
5---
6 src/video/SDL_bmp.c | 5 +++++
7 1 file changed, 5 insertions(+)
8
9diff --git a/src/video/SDL_bmp.c b/src/video/SDL_bmp.c
10index 8eadc5f..5b5e12c 100644
11--- a/src/video/SDL_bmp.c
12+++ b/src/video/SDL_bmp.c
13@@ -143,6 +143,11 @@ SDL_Surface * SDL_LoadBMP_RW (SDL_RWops *src, int freesrc)
14 	(void) biYPelsPerMeter;
15 	(void) biClrImportant;
16
17+        if (biWidth <= 0 || biHeight == 0) {
18+            SDL_SetError("BMP file with bad dimensions (%dx%d)", biWidth, biHeight);
19+            was_error = SDL_TRUE;
20+            goto done;
21+        }
22 	if (biHeight < 0) {
23 		topDown = SDL_TRUE;
24 		biHeight = -biHeight;
25--
262.25.1
27
28