avcodec/ffv1dec: Check for 0 quant tables

[ffmpeg] / libavcodec / ffv1dec.c

diff --git a/libavcodec/ffv1dec.c b/libavcodec/ffv1dec.c
index d9e1e73fd632e29091b36b79ed61f26c478e1302..367d8c7b95b62fbb141b65f3d72a486a10ce38f9 100644 (file)
--- a/libavcodec/ffv1dec.c
+++ b/libavcodec/ffv1dec.c
@@ -569,7 +569,7 @@ static int read_extra_header(FFV1Context *f)
     }
 
     f->quant_table_count = get_symbol(c, state, 0);
-    if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES)
+    if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES || !f->quant_table_count)
         return AVERROR_INVALIDDATA;
 
     for (i = 0; i < f->quant_table_count; i++) {