From 0981dfee7d413ec6f30f00ddb109e3959c05bebd Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Fri, 6 Jul 2018 22:23:25 +0200
Subject: [PATCH] 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>
(cherry picked from commit 3a2d21bc5f97aa0161db3ae731fc2732be6108b8)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavformat/movenc.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index efddaaf7200..ef76c6a5a58 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -5215,6 +5215,11 @@ 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) &&
--
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