avcodec/cbs: fix crash in sei_pic_timestamp

Signed-off-by: Aman Gupta <aman@tmm1.net>
6 years ago · b6c3a02740
parent 64c50c0e97
commit b6c3a02740
1 changed files with 6 additions and 0 deletions
--- a/libavcodec/cbs_h264_syntax_template.c
+++ b/libavcodec/cbs_h264_syntax_template.c
@ -584,6 +584,12 @@ static int FUNC(sei_pic_timestamp)(CodedBitstreamContext *ctx, RWContext *rw,
    }

    sps = h264->active_sps;
+    if (!sps) {
+        av_log(ctx->log_ctx, AV_LOG_ERROR,
+               "No active SPS for pic_timestamp.\n");
+        return AVERROR_INVALIDDATA;
+    }
+
    if (sps->vui.nal_hrd_parameters_present_flag)
        time_offset_length = sps->vui.nal_hrd_parameters.time_offset_length;
    else if (sps->vui.vcl_hrd_parameters_present_flag)