linux-kernel - [PATCH] scsi: mpt3sas: Fix invalid NUMA node index

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Message-ID: <20251230031416.55328-1-vulab@iscas.ac.cn>
Date: Tue, 30 Dec 2025 11:14:16 +0800
From: Haotian Zhang <vulab@...as.ac.cn>
To: Sathya Prakash <sathya.prakash@...adcom.com>,
	Sreekanth Reddy <sreekanth.reddy@...adcom.com>,
	Suganath Prabu Subramani <suganath-prabu.subramani@...adcom.com>,
	"James E . J . Bottomley" <James.Bottomley@...senPartnership.com>,
	"Martin K . Petersen" <martin.petersen@...cle.com>
Cc: MPT-FusionLinux.pdl@...adcom.com,
	linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Haotian Zhang <vulab@...as.ac.cn>
Subject: [PATCH] scsi: mpt3sas: Fix invalid NUMA node index

When dev_to_node() returns NUMA_NO_NODE (-1), passing it directly to
cpumask_of_node() causes an array index out-of-bounds access.

Check for NUMA_NO_NODE and fall back to node 0 if detected.

Fixes: fdb8ed13a772 ("scsi: mpt3sas: Use irq_set_affinity_and_hint()")
Signed-off-by: Haotian Zhang <vulab@...as.ac.cn>
---
 drivers/scsi/mpt3sas/mpt3sas_base.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 0d652db8fe24..3fe071e8490d 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -3238,7 +3238,11 @@ _base_assign_reply_queues(struct MPT3SAS_ADAPTER *ioc)
 		 * corresponding to high iops queues.
 		 */
 		if (ioc->high_iops_queues) {
-			mask = cpumask_of_node(dev_to_node(&ioc->pdev->dev));
+			int nid = dev_to_node(&ioc->pdev->dev);
+
+			if (nid == NUMA_NO_NODE)
+				nid = 0;
+			mask = cpumask_of_node(nid);
 			for (index = 0; index < ioc->high_iops_queues;
 			    index++) {
 				irq = pci_irq_vector(ioc->pdev, index);
-- 
2.43.0