commit 46456ace160dab6e4e6de5cfe89fdb7546f2feb3
author Haihua Hu <jared.hu@nxp.com> Thu Nov 30 17:43:20 2017 +0800
committer Lyon Wang <lyon.wang@nxp.com> Wed Dec 19 10:50:31 2018 +0800
tree b050b7099d8809acd047a5d73e8eb157a5e122d9
parent 10eb88d00ee82269a3748716d79be54b0c9418a3

basetextoverlay: need avoid idx exceed memory block number

when check whether video buffer is read only, the gst_buffer_get_memory call
should make sure idx don't exceed the total memory block number

upstream status: i.mx specific

Signed-off-by: Haihua Hu <jared.hu@nxp.com>

ext/pango/gstbasetextoverlay.c

diff --git a/ext/pango/gstbasetextoverlay.c b/ext/pango/gstbasetextoverlay.c
index f942fa3..80e0389 100755
--- a/ext/pango/gstbasetextoverlay.c
+++ b/ext/pango/gstbasetextoverlay.c
@@ -2369,7 +2369,9 @@
   gboolean mem_rdonly = FALSE;
   GstMemory *mem;
 
-  while (mem = gst_buffer_get_memory(video_frame, idx++)) {
+  gint n_mem = gst_buffer_n_memory (video_frame);
+
+  while (idx < n_mem && (mem = gst_buffer_get_memory(video_frame, idx++))) {
     if (GST_MEMORY_IS_READONLY(mem)) {
       gst_memory_unref (mem);
       mem_rdonly = TRUE;