From f09e6e909b5afa22a5d7d395861004c3bbc14fd9 Mon Sep 17 00:00:00 2001
From: Niklas Eiling <niklas.eiling@eonerc.rwth-aachen.de>
Date: Tue, 31 Oct 2023 15:53:42 +0100
Subject: [PATCH] fix possible segfault due to non-functional range check with
 unsigned int

Signed-off-by: Niklas Eiling <niklas.eiling@eonerc.rwth-aachen.de>
---
 lib/node.cpp | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/node.cpp b/lib/node.cpp
index 483573e9a..f55789fe0 100644
--- a/lib/node.cpp
+++ b/lib/node.cpp
@@ -310,16 +310,17 @@ int Node::write(struct Sample *smps[], unsigned cnt) {
 
 #ifdef WITH_HOOKS
   // Run write hooks
-  cnt = out.hooks.process(smps, cnt);
-  if (cnt <= 0)
-    return cnt;
+  int hook_cnt = out.hooks.process(smps, cnt);
+  if (hook_cnt <= 0)
+    return hook_cnt;
+  cnt = hook_cnt;
 #endif // WITH_HOOKS
 
   vect = getFactory()->getVectorize();
   if (!vect)
     vect = cnt;
 
-  while (cnt - nsent > 0) {
+  while (cnt > static_cast<unsigned>(nsent)) {
     tosend = MIN(cnt - nsent, vect);
     sent = _write(&smps[nsent], tosend);
     if (sent < 0)