lavu/hwcontext_opencl: clear dangling pointers on map failure

libavutil/hwcontext_opencl.c

@@ -2152,6 +2152,7 @@ fail:
             clReleaseMemObject(mapping->frame.planes[p]);
     }
     av_free(mapping);
+    memset(dst->data, 0, sizeof(dst->data));
     return err;
 }
 
@@ -2329,6 +2330,7 @@ fail:
         if (desc->planes[p])
             clReleaseMemObject(desc->planes[p]);
     av_freep(&desc);
+    memset(dst->data, 0, sizeof(dst->data));
     return err;
 }
 
@@ -2419,6 +2421,7 @@ fail:
         0, NULL, &event);
     if (cle == CL_SUCCESS)
         opencl_wait_events(dst_fc, &event, 1);
+    memset(dst->data, 0, sizeof(dst->data));
     return err;
 }
 
@@ -2574,6 +2577,7 @@ fail:
         0, NULL, &event);
     if (cle == CL_SUCCESS)
         opencl_wait_events(dst_fc, &event, 1);
+    memset(dst->data, 0, sizeof(dst->data));
     return err;
 }
 
@@ -2805,6 +2809,7 @@ fail:
             clReleaseMemObject(mapping->object_buffers[i]);
     }
     av_free(mapping);
+    memset(dst->data, 0, sizeof(dst->data));
     return err;
 }