[Encode] VP9 Encode Fix file colums calculation

When picParam->log2_tile_columns is 0 and min_log2_tile_cols
is 1 then Vp9WriteUncompressHeader will crash will while loop.
col_data will be -1 and while loop will be huze and potentially
crash or unknow behaviour.

To avoid this added a boundary check to fix this issue.

Signed-off-by: sachin kumar <[email protected]>

Author: kumarsac

media_softlet/linux/common/codec/ddi/enc/media_libvpx_vp9_next.cpp

@@ -449,7 +449,15 @@ bool Vp9WriteUncompressHeader(encode::DDI_ENCODE_CONTEXT *ddiEncContext,
         min_log2_tile_cols = get_min_log2_tile_cols(sb_cols);
         max_log2_tile_cols = get_max_log2_tile_cols(sb_cols);
 
-        col_data = picParam->log2_tile_columns - min_log2_tile_cols;
+        if (picParam->log2_tile_columns < min_log2_tile_cols)
+        {
+            col_data = 0;
+        }
+        else
+        {
+            col_data = picParam->log2_tile_columns - min_log2_tile_cols;
+        }
+
         while (col_data--)
         {
             vp9_wb_write_bit(wb, 1);