X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fhnm.c;h=47a1808afba11894b91a9486e4f4393c27ae94b6;hb=2b1922d9641012a01eee144a4410f5e94ccfbec7;hp=e3154141f50062516c5daf6caff5d6f035363182;hpb=0dd8e96b32b2bd757261e738a80c2987185125e8;p=ffmpeg

diff --git a/libavformat/hnm.c b/libavformat/hnm.c
index e3154141f50..47a1808afba 100644
--- 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);