From 937632ff39faa3d111144fc56cbc3bec62a5c46d Mon Sep 17 00:00:00 2001
From: Julien Esseiva <esseivaju@users.noreply.github.com>
Date: Thu, 7 Nov 2024 14:15:46 -0800
Subject: [PATCH] Fix dBVH memcpy size (#1490)

---
 src/geocel/vg/detail/VecgeomSetup.cu | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/geocel/vg/detail/VecgeomSetup.cu b/src/geocel/vg/detail/VecgeomSetup.cu
index dc0610b4e2..9b27014b3c 100644
--- a/src/geocel/vg/detail/VecgeomSetup.cu
+++ b/src/geocel/vg/detail/VecgeomSetup.cu
@@ -64,8 +64,11 @@ CudaPointers<vecgeom::cuda::BVH const> bvh_pointers_device()
     }
 
     // Copy from symbol using runtime API
-    CELER_CUDA_CALL(cudaMemcpyFromSymbol(
-        &result.symbol, vecgeom::cuda::dBVH, 1, 0, cudaMemcpyDeviceToHost));
+    CELER_CUDA_CALL(cudaMemcpyFromSymbol(&result.symbol,
+                                         vecgeom::cuda::dBVH,
+                                         sizeof(vecgeom::cuda::dBVH),
+                                         0,
+                                         cudaMemcpyDeviceToHost));
     CELER_CUDA_CALL(cudaDeviceSynchronize());
 
     return result;