From ad1d72df6fc140999c3ca31e6b138fd7d1498728 Mon Sep 17 00:00:00 2001
From: Niklas Hauser <121870655+niklaut@users.noreply.github.com>
Date: Thu, 7 Sep 2023 20:22:58 +0200
Subject: [PATCH] uORB: fix hardfault in uORB calloc implementation

When running out-of-memory, the malloc returns NULL and the memset then tries to write to address 0 which results in a hardfault.
---
 platforms/common/uORB/uORBDeviceNode.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/platforms/common/uORB/uORBDeviceNode.cpp b/platforms/common/uORB/uORBDeviceNode.cpp
index 7cc5c9bd3e..112170de6b 100644
--- a/platforms/common/uORB/uORBDeviceNode.cpp
+++ b/platforms/common/uORB/uORBDeviceNode.cpp
@@ -188,7 +188,10 @@ uORB::DeviceNode::write(cdev::file_t *filp, const char *buffer, size_t buflen)
 			if (nullptr == _data) {
 				const size_t data_size = _meta->o_size * _queue_size;
 				_data = (uint8_t *) px4_cache_aligned_alloc(data_size);
-				memset(_data, 0, data_size);
+
+				if (_data) {
+					memset(_data, 0, data_size);
+				}
 			}
 
 			unlock();