linux-hardening - [RFC][PATCH v2 08/29] cpu: Annotate static information into Kmemdump

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250724135512.518487-9-eugen.hristev@linaro.org>
Date: Thu, 24 Jul 2025 16:54:51 +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 08/29] cpu: Annotate static information into Kmemdump

Annotate vital static information into kmemdump:
 - __cpu_present_mask
 - __cpu_online_mask
 - __cpu_possible_mask
 - __cpu_active_mask

Information on these variables is stored into dedicated kmemdump section.

Signed-off-by: Eugen Hristev <eugen.hristev@...aro.org>
---
 kernel/cpu.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index faf0f23fc5d8..d48e4dd979e9 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -38,6 +38,7 @@
 #include <linux/random.h>
 #include <linux/cc_platform.h>
 #include <linux/parser.h>
+#include <linux/kmemdump.h>
 
 #include <trace/events/power.h>
 #define CREATE_TRACE_POINTS
@@ -3092,18 +3093,22 @@ struct cpumask __cpu_possible_mask __ro_after_init
 struct cpumask __cpu_possible_mask __ro_after_init;
 #endif
 EXPORT_SYMBOL(__cpu_possible_mask);
+KMEMDUMP_VAR_CORE(__cpu_possible_mask, sizeof(__cpu_possible_mask));
 
 struct cpumask __cpu_online_mask __read_mostly;
 EXPORT_SYMBOL(__cpu_online_mask);
+KMEMDUMP_VAR_CORE(__cpu_online_mask, sizeof(__cpu_online_mask));
 
 struct cpumask __cpu_enabled_mask __read_mostly;
 EXPORT_SYMBOL(__cpu_enabled_mask);
 
 struct cpumask __cpu_present_mask __read_mostly;
 EXPORT_SYMBOL(__cpu_present_mask);
+KMEMDUMP_VAR_CORE(__cpu_present_mask, sizeof(__cpu_present_mask));
 
 struct cpumask __cpu_active_mask __read_mostly;
 EXPORT_SYMBOL(__cpu_active_mask);
+KMEMDUMP_VAR_CORE(__cpu_active_mask, sizeof(__cpu_active_mask));
 
 struct cpumask __cpu_dying_mask __read_mostly;
 EXPORT_SYMBOL(__cpu_dying_mask);
-- 
2.43.0