[FFmpeg-cvslog] avformat/avidec: dv does not support palettes

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Mon Nov  9 21:48:31 2020 +0100| [1b373b41d940e3058cdfb3d17703e23ed665353c] | committer: Michael Niedermayer

avformat/avidec: dv does not support palettes

Fixes: memleak
Fixes: 26937/clusterfuzz-testcase-minimized-ffmpeg_dem_AVI_fuzzer-5763003338981376

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1b373b41d940e3058cdfb3d17703e23ed665353c
---

 libavformat/avidec.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index 57dc54452b..e92a449969 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -1446,6 +1446,7 @@ resync:
     if (avi->stream_index >= 0) {
         AVStream *st   = s->streams[avi->stream_index];
         AVIStream *ast = st->priv_data;
+        int dv_demux = CONFIG_DV_DEMUXER && avi->dv_demux;
         int size, err;
 
         if (get_subtitle_pkt(s, st, pkt))
@@ -1468,7 +1469,7 @@ resync:
             return err;
         size = err;
 
-        if (ast->has_pal && pkt->size < (unsigned)INT_MAX / 2) {
+        if (ast->has_pal && pkt->size < (unsigned)INT_MAX / 2 && !dv_demux) {
             uint8_t *pal;
             pal = av_packet_new_side_data(pkt,
                                           AV_PKT_DATA_PALETTE,
@@ -1482,7 +1483,7 @@ resync:
             }
         }
 
-        if (CONFIG_DV_DEMUXER && avi->dv_demux) {
+        if (dv_demux) {
             AVBufferRef *avbuf = pkt->buf;
             size = avpriv_dv_produce_packet(avi->dv_demux, pkt,
                                             pkt->data, pkt->size, pkt->pos);