linux-hardening - [RFC][PATCH v2 10/29] panic: Annotate static information into Kmemdump

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Message-ID: <20250724135512.518487-11-eugen.hristev@linaro.org>
Date: Thu, 24 Jul 2025 16:54:53 +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 10/29] panic: Annotate static information into Kmemdump

Annotate vital static information into kmemdump:
 - tainted_mask
 - taint_flags

Information on these variables is stored into dedicated kmemdump section.

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

diff --git a/kernel/panic.c b/kernel/panic.c
index ccee04378d2e..fb561a2fdb59 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -39,6 +39,7 @@
 #include <linux/sys_info.h>
 #include <trace/events/error_report.h>
 #include <asm/sections.h>
+#include <linux/kmemdump.h>
 
 #define PANIC_TIMER_STEP 100
 #define PANIC_BLINK_SPD 18
@@ -56,6 +57,7 @@ static unsigned int __read_mostly sysctl_oops_all_cpu_backtrace;
 int panic_on_oops = CONFIG_PANIC_ON_OOPS_VALUE;
 static unsigned long tainted_mask =
 	IS_ENABLED(CONFIG_RANDSTRUCT) ? (1 << TAINT_RANDSTRUCT) : 0;
+KMEMDUMP_VAR_CORE(tainted_mask, sizeof(tainted_mask));
 static int pause_on_oops;
 static int pause_on_oops_flag;
 static DEFINE_SPINLOCK(pause_on_oops_lock);
@@ -601,6 +603,8 @@ const struct taint_flag taint_flags[TAINT_FLAGS_COUNT] = {
 	TAINT_FLAG(FWCTL,			'J', ' ', true),
 };
 
+KMEMDUMP_VAR_CORE(taint_flags, sizeof(taint_flags));
+
 #undef TAINT_FLAG
 
 static void print_tainted_seq(struct seq_buf *s, bool verbose)
-- 
2.43.0