From 81c1657a593b1c0f8e46fca00ead1d30ee1cd418 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 2 Aug 2014 01:15:37 +0200 Subject: [PATCH] avcodec/dvdsub_parser: Check buf_size before reading 32bit packet size Signed-off-by: Michael Niedermayer --- libavcodec/dvdsub_parser.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavcodec/dvdsub_parser.c b/libavcodec/dvdsub_parser.c index 9a6457e8b4..07ed4f72fc 100644 --- a/libavcodec/dvdsub_parser.c +++ b/libavcodec/dvdsub_parser.c @@ -45,8 +45,9 @@ static int dvdsub_parse(AVCodecParserContext *s, DVDSubParseContext *pc = s->priv_data; if (pc->packet_index == 0) { - if (buf_size < 2) + if (buf_size < 2 || AV_RB16(buf) && buf_size < 6) { return buf_size; + } pc->packet_len = AV_RB16(buf); if (pc->packet_len == 0) /* HD-DVD subpicture packet */ pc->packet_len = AV_RB32(buf+2);