Fix T50888: Numeric overflow in split kernel state buffer size calculation

Overflow led to the state buffer being too small and the split kernel to
get stuck doing nothing forever.

2 files changed, 2 insertions, 2 deletions

diff --git a/intern/cycles/kernel/kernels/cuda/kernel_split.cu b/intern/cycles/kernel/kernels/cuda/kernel_split.cu
index 6c508c2cd79..fbdf79697d5 100644
--- a/intern/cycles/kernel/kernels/cuda/kernel_split.cu
+++ b/intern/cycles/kernel/kernels/cuda/kernel_split.cu
@@ -46,7 +46,7 @@
 /* kernels */
 extern "C" __global__ void
 CUDA_LAUNCH_BOUNDS(CUDA_THREADS_BLOCK_WIDTH, CUDA_KERNEL_MAX_REGISTERS)
-kernel_cuda_state_buffer_size(uint num_threads, uint *size)
+kernel_cuda_state_buffer_size(uint num_threads, uint64_t *size)
 {
 	*size = split_data_buffer_size(NULL, num_threads);
 }
diff --git a/intern/cycles/kernel/kernels/opencl/kernel_state_buffer_size.cl b/intern/cycles/kernel/kernels/opencl/kernel_state_buffer_size.cl
index 0a1843ff8bd..4c9bf63ef51 100644
--- a/intern/cycles/kernel/kernels/opencl/kernel_state_buffer_size.cl
+++ b/intern/cycles/kernel/kernels/opencl/kernel_state_buffer_size.cl
@@ -21,7 +21,7 @@ __kernel void kernel_ocl_path_trace_state_buffer_size(
         KernelGlobals *kg,
         ccl_constant KernelData *data,
         uint num_threads,
-        ccl_global uint *size)
+        ccl_global uint64_t *size)
 {
 	kg->data = data;
 	*size = split_data_buffer_size(kg, num_threads);