[FFmpeg-cvslog] avpacket: Error out when creating 0-sized side data

[Vittorio Giovara]

ffmpeg | branch: master | Vittorio Giovara <vittorio.giovara at gmail.com> | Thu Jun  9 18:35:03 2016 -0400| [05a4bacbf7ece618553d339afe1d0b57bc87aea8] | committer: Vittorio Giovara

avpacket: Error out when creating 0-sized side data

This mimics the behaviour of other av_*_new_side_data().
This is not caught by the malloc check, since padding
is always added to the allocated size.

Signed-off-by: Vittorio Giovara <vittorio.giovara at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=05a4bacbf7ece618553d339afe1d0b57bc87aea8
---

 libavcodec/avpacket.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c
index 04d6244..76fc4eb 100644
--- a/libavcodec/avpacket.c
+++ b/libavcodec/avpacket.c
@@ -265,7 +265,7 @@ uint8_t *av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
     int ret;
     uint8_t *data;
 
-    if ((unsigned)size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
+    if (!size || (unsigned)size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
         return NULL;
     data = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
     if (!data)