linux-hardening - [RFC][PATCH v2 19/29] mm/mm_init: Annotate static information into Kmemdump

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Message-ID: <20250724135512.518487-20-eugen.hristev@linaro.org>
Date: Thu, 24 Jul 2025 16:55:02 +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 19/29] mm/mm_init: Annotate static information into Kmemdump

Annotate vital static information into kmemdump:
 - high_memory

Information on these variables is stored into dedicated kmemdump section.

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

diff --git a/mm/mm_init.c b/mm/mm_init.c
index 5c21b3af216b..fd577f988f79 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -32,6 +32,7 @@
 #include <linux/vmstat.h>
 #include <linux/kexec_handover.h>
 #include <linux/hugetlb.h>
+#include <linux/kmemdump.h>
 #include "internal.h"
 #include "slab.h"
 #include "shuffle.h"
@@ -52,6 +53,7 @@ EXPORT_SYMBOL(mem_map);
  */
 void *high_memory;
 EXPORT_SYMBOL(high_memory);
+KMEMDUMP_VAR_CORE(high_memory, sizeof(high_memory));
 
 #ifdef CONFIG_DEBUG_MEMORY_INIT
 int __meminitdata mminit_loglevel;
-- 
2.43.0