From 9db4f84856c859432a746f0c29ab29fc237e92e6 Mon Sep 17 00:00:00 2001
From: David Rohr <drohr@jwdt.org>
Date: Thu, 23 Apr 2026 10:19:34 +0200
Subject: [PATCH] GPU TPC Clusterizer: Fix out of bounds access

---
 GPU/GPUTracking/TPCClusterFinder/GPUTPCCFCheckPadBaseline.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/GPU/GPUTracking/TPCClusterFinder/GPUTPCCFCheckPadBaseline.cxx b/GPU/GPUTracking/TPCClusterFinder/GPUTPCCFCheckPadBaseline.cxx
index 204d9d6a8b81a..8ec09d9adba6b 100644
--- a/GPU/GPUTracking/TPCClusterFinder/GPUTPCCFCheckPadBaseline.cxx
+++ b/GPU/GPUTracking/TPCClusterFinder/GPUTPCCFCheckPadBaseline.cxx
@@ -108,7 +108,7 @@ GPUd() void GPUTPCCFCheckPadBaseline::CheckBaselineCPU(int32_t nBlocks, int32_t
   CfChargePos basePos(iBlock * PadsPerCacheline, 0);
 
   constexpr GPUTPCGeometry geo;
-  if (basePos.pad() >= geo.NPads(basePos.row())) {
+  if (basePos.row() >= geo.NROWS || basePos.pad() >= geo.NPads(basePos.row())) {
     return;
   }