avformat/movenc: Check input sample count

Fixes: division by 0 Fixes: fpe_movenc.c_199_1.wav Fixes: fpe_movenc.c_199_2.wav Fixes: fpe_movenc.c_199_3.wav Fixes: fpe_movenc.c_199_4.wav Fixes: fpe_movenc.c_199_5.wav Fixes: fpe_movenc.c_199_6.wav Fixes: fpe_movenc.c_199_7.wav Found-by: #CHEN HONGXU# <HCHEN017@e.ntu.edu.sg> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
7 years ago · 3a2d21bc5f
parent ee1e3ca5eb
commit 3a2d21bc5f
1 changed files with 5 additions and 0 deletions
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@ -5269,6 +5269,11 @@ int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt)
    else
        samples_in_chunk = 1;

+    if (samples_in_chunk < 1) {
+        av_log(s, AV_LOG_ERROR, "fatal error, input packet contains no samples\n");
+        return AVERROR_PATCHWELCOME;
+    }
+
    /* copy extradata if it exists */
    if (trk->vos_len == 0 && par->extradata_size > 0 &&
        !TAG_IS_AVCI(trk->tag) &&