linux-hardening - [RFC][PATCH v2 27/29] kallsyms: Annotate static information into Kmemdump

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Message-ID: <20250724135512.518487-28-eugen.hristev@linaro.org>
Date: Thu, 24 Jul 2025 16:55:10 +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 27/29] kallsyms: Annotate static information into Kmemdump

Annotate vital static information into kmemdump:
 - kallsysms_num_syms
 - kallsyms_relative_base
 - kallsysms_offsets
 - kallsysms_names
 - kallsyms_token_table
 - kallsyms_token_index
 - kallsyms_markers
 - kallsyms_seqs_of_names

Information on these variables is stored into dedicated kmemdump section.

Signed-off-by: Eugen Hristev <eugen.hristev@...aro.org>
---
 kernel/kallsyms.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index 1e7635864124..442dc13d00cf 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -31,9 +31,19 @@
 #include <linux/kernel.h>
 #include <linux/bsearch.h>
 #include <linux/btf_ids.h>
+#include <linux/kmemdump.h>
 
 #include "kallsyms_internal.h"
 
+KMEMDUMP_VAR_CORE(kallsyms_num_syms, sizeof(kallsyms_num_syms));
+KMEMDUMP_VAR_CORE(kallsyms_relative_base, sizeof(kallsyms_relative_base));
+KMEMDUMP_VAR_CORE(kallsyms_offsets, sizeof(&kallsyms_offsets));
+KMEMDUMP_VAR_CORE(kallsyms_names, sizeof(&kallsyms_names));
+KMEMDUMP_VAR_CORE(kallsyms_token_table, sizeof(&kallsyms_token_table));
+KMEMDUMP_VAR_CORE(kallsyms_token_index, sizeof(&kallsyms_token_index));
+KMEMDUMP_VAR_CORE(kallsyms_markers, sizeof(&kallsyms_markers));
+KMEMDUMP_VAR_CORE(kallsyms_seqs_of_names, sizeof(&kallsyms_seqs_of_names));
+
 /*
  * Expand a compressed symbol data into the resulting uncompressed string,
  * if uncompressed string is too long (>= maxlen), it will be truncated,
-- 
2.43.0