diff -r 9ccaa3a0dfb6 -r a59bfe382008 IMG_bmp.c
--- a/IMG_bmp.c	Thu Jul 11 01:01:56 2019 +0300
+++ b/IMG_bmp.c	Tue Jul 30 21:29:15 2019 +0300
@@ -272,6 +272,11 @@
 		biClrUsed	= SDL_ReadLE32(src);
 		biClrImportant	= SDL_ReadLE32(src);
 	}
+	if (biWidth <= 0 || biHeight == 0) {
+		IMG_SetError("BMP file with bad dimensions (%dx%d)", biWidth, biHeight);
+		was_error = SDL_TRUE;
+		goto done;
+	}
 	if (biHeight < 0) {
 		topDown = SDL_TRUE;
 		biHeight = -biHeight;