linux-hardening - [RFC][PATCH v2 15/29] mm/init-mm: Annotate static information into Kmemdump

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Message-ID: <20250724135512.518487-16-eugen.hristev@linaro.org>
Date: Thu, 24 Jul 2025 16:54:58 +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 15/29] mm/init-mm: Annotate static information into Kmemdump

Annotate vital static information into kmemdump:
 - init_mm
 - init_mm.pgd

Information on these variables is stored into dedicated kmemdump section.

Signed-off-by: Eugen Hristev <eugen.hristev@...aro.org>
---
 mm/init-mm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mm/init-mm.c b/mm/init-mm.c
index 4600e7605cab..2dbbaf640cf4 100644
--- a/mm/init-mm.c
+++ b/mm/init-mm.c
@@ -7,6 +7,7 @@
 #include <linux/cpumask.h>
 #include <linux/mman.h>
 #include <linux/pgtable.h>
+#include <linux/kmemdump.h>
 
 #include <linux/atomic.h>
 #include <linux/user_namespace.h>
@@ -48,6 +49,9 @@ struct mm_struct init_mm = {
 	INIT_MM_CONTEXT(init_mm)
 };
 
+KMEMDUMP_VAR_CORE(init_mm, sizeof(init_mm));
+KMEMDUMP_VAR_CORE_NAMED(init_mm_pgd, init_mm.pgd, sizeof(*init_mm.pgd));
+
 void setup_initial_init_mm(void *start_code, void *end_code,
 			   void *end_data, void *brk)
 {
-- 
2.43.0