From c92f55847a3d9cd12db60bfcd0831ff7f089c37c Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 26 Oct 2016 00:11:52 +0200 Subject: [PATCH] avcodec/dvdsubdec: Fix off by 1 error Fixes out of array read Found-by: Thomas Garnier using libFuzzer Signed-off-by: Michael Niedermayer --- libavcodec/dvdsubdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/dvdsubdec.c b/libavcodec/dvdsubdec.c index 6cb612bb9540d..e91d63ea295c7 100644 --- a/libavcodec/dvdsubdec.c +++ b/libavcodec/dvdsubdec.c @@ -185,7 +185,7 @@ static void guess_palette(DVDSubContext* ctx, for(i = 0; i < 4; i++) { if (alpha[i] != 0) { if (!color_used[colormap[i]]) { - level = level_map[nb_opaque_colors][j]; + level = level_map[nb_opaque_colors - 1][j]; r = (((subtitle_color >> 16) & 0xff) * level) >> 8; g = (((subtitle_color >> 8) & 0xff) * level) >> 8; b = (((subtitle_color >> 0) & 0xff) * level) >> 8;