linux-hardening - [RFC][PATCH v2 09/29] genirq/irqdesc: Annotate static information into Kmemdump

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Message-ID: <20250724135512.518487-10-eugen.hristev@linaro.org>
Date: Thu, 24 Jul 2025 16:54:52 +0300
From: Eugen Hristev <eugen.hristev@...aro.org>
To: linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	linux-arch@...r.kernel.org,
	linux-mm@...ck.org,
	tglx@...utronix.de,
	andersson@...nel.org,
	pmladek@...e.com
Cc: linux-arm-kernel@...ts.infradead.org,
	linux-hardening@...r.kernel.org,
	eugen.hristev@...aro.org,
	corbet@....net,
	mojha@....qualcomm.com,
	rostedt@...dmis.org,
	jonechou@...gle.com,
	tudor.ambarus@...aro.org
Subject: [RFC][PATCH v2 09/29] genirq/irqdesc: Annotate static information into Kmemdump

Annotate vital static information into kmemdump:
 - nr_irqs

Information on these variables is stored into dedicated kmemdump section.

Signed-off-by: Eugen Hristev <eugen.hristev@...aro.org>
---
 kernel/irq/irqdesc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index b64c57b44c20..6d11b85be2b3 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -12,6 +12,7 @@
 #include <linux/export.h>
 #include <linux/interrupt.h>
 #include <linux/kernel_stat.h>
+#include <linux/kmemdump.h>
 #include <linux/maple_tree.h>
 #include <linux/irqdomain.h>
 #include <linux/sysfs.h>
@@ -140,6 +141,7 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node,
 }
 
 static unsigned int nr_irqs = NR_IRQS;
+KMEMDUMP_VAR_CORE(nr_irqs, sizeof(nr_irqs));
 
 /**
  * irq_get_nr_irqs() - Number of interrupts supported by the system.
-- 
2.43.0