From 190f63854bae3b95e5ca0193c4086c662bc02a10 Mon Sep 17 00:00:00 2001
From: Stephan Seitz <stephan.seitz@fau.de>
Date: Mon, 5 Oct 2020 10:47:29 +0200
Subject: [PATCH] CustomMemoryBuffer: only memcpy when not `nullptr`
---
src/cuda/communication/CustomMemoryBuffer.impl.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/src/cuda/communication/CustomMemoryBuffer.impl.h b/src/cuda/communication/CustomMemoryBuffer.impl.h
index 377ba4bd3..5bf1ac8c1 100644
--- a/src/cuda/communication/CustomMemoryBuffer.impl.h
+++ b/src/cuda/communication/CustomMemoryBuffer.impl.h
@@ -83,7 +83,10 @@ namespace communication {
newBegin = reinterpret_cast<ElementType *>(Allocator::allocate( newSize ));
- Allocator::memcpy( newBegin, begin_, size_t(end_ - begin_) );
+ // memcpy: If either dest or src is an invalid or null pointer, the behavior is undefined, even if count is zero.
+ if(begin_) {
+ Allocator::memcpy( newBegin, begin_, size_t(end_ - begin_) );
+ }
std::swap( begin_, newBegin );
if( newBegin != nullptr )
--
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