avformat/hnm: check chunk_size == 0

Fixes potential infinite loop Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
11 years ago · 5c4aa72b75
parent bd8d28e2d2
commit 5c4aa72b75
1 changed files with 1 additions and 1 deletions
--- a/libavformat/hnm.c
+++ b/libavformat/hnm.c
@ -148,7 +148,7 @@ static int hnm_read_packet(AVFormatContext *s, AVPacket *pkt)
    chunk_id = avio_rl16(pb);
    avio_skip(pb, 2);

-    if (chunk_size > hnm->superchunk_remaining) {
+    if (chunk_size > hnm->superchunk_remaining || !chunk_size) {
        av_log(s, AV_LOG_ERROR, "invalid chunk size: %u, offset: %u\n",
               chunk_size, (int) avio_tell(pb));
        avio_skip(pb, hnm->superchunk_remaining - 8);