linux-kernel - [PATCH v8 04/27] mm/ksw: add build system support

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: <20251110163634.3686676-5-wangjinchao600@gmail.com>
Date: Tue, 11 Nov 2025 00:35:59 +0800
From: Jinchao Wang <wangjinchao600@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
	"Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Randy Dunlap <rdunlap@...radead.org>,
	Marco Elver <elver@...gle.com>,
	Mike Rapoport <rppt@...nel.org>,
	Alexander Potapenko <glider@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Andrey Konovalov <andreyknvl@...il.com>,
	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	Andrii Nakryiko <andrii@...nel.org>,
	Ard Biesheuvel <ardb@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ben Segall <bsegall@...gle.com>,
	Bill Wendling <morbo@...gle.com>,
	Borislav Petkov <bp@...en8.de>,
	Catalin Marinas <catalin.marinas@....com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	David Hildenbrand <david@...hat.com>,
	David Kaplan <david.kaplan@....com>,
	"David S. Miller" <davem@...emloft.net>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Ian Rogers <irogers@...gle.com>,
	Ingo Molnar <mingo@...hat.com>,
	James Clark <james.clark@...aro.org>,
	Jinchao Wang <wangjinchao600@...il.com>,
	Jinjie Ruan <ruanjinjie@...wei.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Jonathan Corbet <corbet@....net>,
	Juri Lelli <juri.lelli@...hat.com>,
	Justin Stitt <justinstitt@...gle.com>,
	kasan-dev@...glegroups.com,
	Kees Cook <kees@...nel.org>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>,
	"Liang Kan" <kan.liang@...ux.intel.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	linux-perf-users@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	llvm@...ts.linux.dev,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	Mark Rutland <mark.rutland@....com>,
	Masahiro Yamada <masahiroy@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Mel Gorman <mgorman@...e.de>,
	Michal Hocko <mhocko@...e.com>,
	Miguel Ojeda <ojeda@...nel.org>,
	Nam Cao <namcao@...utronix.de>,
	Namhyung Kim <namhyung@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Naveen N Rao <naveen@...nel.org>,
	Nick Desaulniers <nick.desaulniers+lkml@...il.com>,
	Rong Xu <xur@...gle.com>,
	Sami Tolvanen <samitolvanen@...gle.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Suren Baghdasaryan <surenb@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Thomas Weißschuh <thomas.weissschuh@...utronix.de>,
	Valentin Schneider <vschneid@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Vincenzo Frascino <vincenzo.frascino@....com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Will Deacon <will@...nel.org>,
	workflows@...r.kernel.org,
	x86@...nel.org
Subject: [PATCH v8 04/27] mm/ksw: add build system support

Add Kconfig and Makefile infrastructure.

The implementation is located under `mm/kstackwatch/`.

Signed-off-by: Jinchao Wang <wangjinchao600@...il.com>
---
 include/linux/kstackwatch.h |  5 +++++
 mm/Kconfig                  |  1 +
 mm/Makefile                 |  1 +
 mm/kstackwatch/Kconfig      | 14 ++++++++++++++
 mm/kstackwatch/Makefile     |  2 ++
 mm/kstackwatch/kernel.c     | 23 +++++++++++++++++++++++
 mm/kstackwatch/stack.c      |  1 +
 mm/kstackwatch/watch.c      |  1 +
 8 files changed, 48 insertions(+)
 create mode 100644 include/linux/kstackwatch.h
 create mode 100644 mm/kstackwatch/Kconfig
 create mode 100644 mm/kstackwatch/Makefile
 create mode 100644 mm/kstackwatch/kernel.c
 create mode 100644 mm/kstackwatch/stack.c
 create mode 100644 mm/kstackwatch/watch.c

diff --git a/include/linux/kstackwatch.h b/include/linux/kstackwatch.h
new file mode 100644
index 000000000000..0273ef478a26
--- /dev/null
+++ b/include/linux/kstackwatch.h
@@ -0,0 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _KSTACKWATCH_H
+#define _KSTACKWATCH_H
+
+#endif /* _KSTACKWATCH_H */
diff --git a/mm/Kconfig b/mm/Kconfig
index 0e26f4fc8717..61d4e6edadf2 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -1373,5 +1373,6 @@ config FIND_NORMAL_PAGE
 	def_bool n
 
 source "mm/damon/Kconfig"
+source "mm/kstackwatch/Kconfig"
 
 endmenu
diff --git a/mm/Makefile b/mm/Makefile
index 21abb3353550..efc101816f00 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -92,6 +92,7 @@ obj-$(CONFIG_PAGE_POISONING) += page_poison.o
 obj-$(CONFIG_KASAN)	+= kasan/
 obj-$(CONFIG_KFENCE) += kfence/
 obj-$(CONFIG_KMSAN)	+= kmsan/
+obj-$(CONFIG_KSTACKWATCH)	+= kstackwatch/
 obj-$(CONFIG_FAILSLAB) += failslab.o
 obj-$(CONFIG_FAIL_PAGE_ALLOC) += fail_page_alloc.o
 obj-$(CONFIG_MEMTEST)		+= memtest.o
diff --git a/mm/kstackwatch/Kconfig b/mm/kstackwatch/Kconfig
new file mode 100644
index 000000000000..496caf264f35
--- /dev/null
+++ b/mm/kstackwatch/Kconfig
@@ -0,0 +1,14 @@
+config KSTACKWATCH
+	bool "Kernel Stack Watch"
+	depends on HAVE_HW_BREAKPOINT && KPROBES && FPROBE && STACKTRACE
+	help
+	  A lightweight real-time debugging tool to detect stack corruption
+	  and abnormal stack usage patterns in the kernel. It monitors stack
+	  boundaries and detects overwrites in real time using hardware
+	  breakpoints and probe-based instrumentation.
+
+	  This feature is intended for kernel developers or advanced users
+	  diagnosing rare stack overflow or memory corruption bugs. It may
+	  introduce minor overhead during runtime monitoring.
+
+	  If unsure, say N.
diff --git a/mm/kstackwatch/Makefile b/mm/kstackwatch/Makefile
new file mode 100644
index 000000000000..c99c621eac02
--- /dev/null
+++ b/mm/kstackwatch/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_KSTACKWATCH)	+= kstackwatch.o
+kstackwatch-y := kernel.o stack.o watch.o
diff --git a/mm/kstackwatch/kernel.c b/mm/kstackwatch/kernel.c
new file mode 100644
index 000000000000..78f1d019225f
--- /dev/null
+++ b/mm/kstackwatch/kernel.c
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+
+static int __init kstackwatch_init(void)
+{
+	pr_info("module loaded\n");
+	return 0;
+}
+
+static void __exit kstackwatch_exit(void)
+{
+	pr_info("module unloaded\n");
+}
+
+module_init(kstackwatch_init);
+module_exit(kstackwatch_exit);
+
+MODULE_AUTHOR("Jinchao Wang");
+MODULE_DESCRIPTION("Kernel Stack Watch");
+MODULE_LICENSE("GPL");
+
diff --git a/mm/kstackwatch/stack.c b/mm/kstackwatch/stack.c
new file mode 100644
index 000000000000..cec594032515
--- /dev/null
+++ b/mm/kstackwatch/stack.c
@@ -0,0 +1 @@
+// SPDX-License-Identifier: GPL-2.0
diff --git a/mm/kstackwatch/watch.c b/mm/kstackwatch/watch.c
new file mode 100644
index 000000000000..cec594032515
--- /dev/null
+++ b/mm/kstackwatch/watch.c
@@ -0,0 +1 @@
+// SPDX-License-Identifier: GPL-2.0
-- 
2.43.0