Check for len<1 in opus_packet_parse_impl()

Rather than read invalid memory

1 files changed, 1 insertions, 1 deletions

diff --git a/src/opus.c b/src/opus.c
index e9ce93b3..7eec8e8e 100644
--- a/src/opus.c
+++ b/src/opus.c
@@ -201,7 +201,7 @@ int opus_packet_parse_impl(const unsigned char *data, opus_int32 len,
    opus_int32 pad = 0;
    const unsigned char *data0 = data;
 
-   if (size==NULL)
+   if (size==NULL || len<1)
       return OPUS_BAD_ARG;
 
    framesize = opus_packet_get_samples_per_frame(data, 48000);