Fix T91641: crash rendering with 16k environment map in Cycles

Protect against integer overflow.

1 files changed, 2 insertions, 2 deletions

diff --git a/intern/cycles/device/cuda/device_impl.cpp b/intern/cycles/device/cuda/device_impl.cpp
index 37fab8f8293..0f10119e24f 100644
--- a/intern/cycles/device/cuda/device_impl.cpp
+++ b/intern/cycles/device/cuda/device_impl.cpp
@@ -837,7 +837,7 @@ void CUDADevice::mem_copy_to(device_memory &mem)
   }
 }
 
-void CUDADevice::mem_copy_from(device_memory &mem, int y, int w, int h, int elem)
+void CUDADevice::mem_copy_from(device_memory &mem, size_t y, size_t w, size_t h, size_t elem)
 {
   if (mem.type == MEM_TEXTURE || mem.type == MEM_GLOBAL) {
     assert(!"mem_copy_from not supported for textures.");
@@ -891,7 +891,7 @@ void CUDADevice::mem_free(device_memory &mem)
   }
 }
 
-device_ptr CUDADevice::mem_alloc_sub_ptr(device_memory &mem, int offset, int /*size*/)
+device_ptr CUDADevice::mem_alloc_sub_ptr(device_memory &mem, size_t offset, size_t /*size*/)
 {
   return (device_ptr)(((char *)mem.device_pointer) + mem.memory_elements_size(offset));
 }