commit dbe5aaa51eafd2d10352924186fef7668e57591d
author Yaowu Xu <yaowu.google.com> Mon Apr 13 08:59:42 2020 -0700
committer Yaowu Xu <yaowu@google.com> Mon Apr 13 17:43:42 2020 +0000
tree 127f2eef900754d87279bda19e238b9d4ea207b0
parent 57247a80af619e849b11cddbaf46caad49457fc5

Avoid potential dereferencing of a null pointer

Change-Id: Ia9b219e06a12e5682f29895228884d8db70232c9

av1/decoder/decodeframe.c

diff --git a/av1/decoder/decodeframe.c b/av1/decoder/decodeframe.c
index a91c04b..addc261 100644
--- a/av1/decoder/decodeframe.c
+++ b/av1/decoder/decodeframe.c
@@ -3938,9 +3938,11 @@
     get_tile_buffers(pbi, data, data_end, tile_buffers, start_tile, end_tile);
 
   if (pbi->tile_data == NULL || n_tiles != pbi->allocated_tiles) {
-    for (int i = 0; i < pbi->allocated_tiles; i++) {
-      TileDataDec *const tile_data = pbi->tile_data + i;
-      av1_dec_row_mt_dealloc(&tile_data->dec_row_mt_sync);
+    if (pbi->tile_data != NULL) {
+      for (int i = 0; i < pbi->allocated_tiles; i++) {
+        TileDataDec *const tile_data = pbi->tile_data + i;
+        av1_dec_row_mt_dealloc(&tile_data->dec_row_mt_sync);
+      }
     }
     decoder_alloc_tile_data(pbi, n_tiles);
   }