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Mon, 10 Nov 2025 08:36:58 -0800 (PST) From: Jinchao Wang To: Andrew Morton , "Masami Hiramatsu (Google)" , Peter Zijlstra , Randy Dunlap , Marco Elver , Mike Rapoport , Alexander Potapenko , Adrian Hunter , Alexander Shishkin , Alice Ryhl , Andrey Konovalov , Andrey Ryabinin , Andrii Nakryiko , Ard Biesheuvel , Arnaldo Carvalho de Melo , Ben Segall , Bill Wendling , Borislav Petkov , Catalin Marinas , Dave Hansen , David Hildenbrand , David Kaplan , "David S. Miller" , Dietmar Eggemann , Dmitry Vyukov , "H. Peter Anvin" , Ian Rogers , Ingo Molnar , James Clark , Jinchao Wang , Jinjie Ruan , Jiri Olsa , Jonathan Corbet , Juri Lelli , Justin Stitt , kasan-dev@googlegroups.com, Kees Cook , "Liam R. Howlett" , "Liang Kan" , Linus Walleij , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-perf-users@vger.kernel.org, linux-trace-kernel@vger.kernel.org, llvm@lists.linux.dev, Lorenzo Stoakes , Mark Rutland , Masahiro Yamada , Mathieu Desnoyers , Mel Gorman , Michal Hocko , Miguel Ojeda , Nam Cao , Namhyung Kim , Nathan Chancellor , Naveen N Rao , Nick Desaulniers , Rong Xu , Sami Tolvanen , Steven Rostedt , Suren Baghdasaryan , Thomas Gleixner , =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= , Valentin Schneider , Vincent Guittot , Vincenzo Frascino , Vlastimil Babka , Will Deacon , workflows@vger.kernel.org, x86@kernel.org Subject: [PATCH v8 04/27] mm/ksw: add build system support Date: Tue, 11 Nov 2025 00:35:59 +0800 Message-ID: <20251110163634.3686676-5-wangjinchao600@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251110163634.3686676-1-wangjinchao600@gmail.com> References: <20251110163634.3686676-1-wangjinchao600@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: A46BF4000C X-Stat-Signature: spbps7rm6wfbpk9k7pn5c4traxoczuhp X-Rspam-User: X-HE-Tag: 1762792620-33806 X-HE-Meta: U2FsdGVkX1/PP+/2X0P9XFIGNiqUX4oPrDRW8Sv2Xo1umyCcR+EGIJiLrWE1DMM2svrLx2CCcf8GQvpY5PMIsALmKMphGQc+Q3C8IjE2OJRTFIB9Lu6RcgEOeilaLExIZUd/1JPiDMq9LYi3MssbPVapzIZP3S60UU10P9XcwPPOIHbV2cBCqQQOHo84eJP1yoZRXZviz6WS+4Xvy1+L8Fzxz1xa6ae8eSX/8QU/IrEx5wxdo46SQiXg9mQqplXa+VPjuSZa9BqbuvacusdS/uDsZGiUbtmHD78sFnXKMS0zt5lOhTfPC/EFvm31FU2qDBDVQIMdevgQVuiSud31e5aCj0uiFQ3sLe4pObZya2hD9T277BAotE1bxcPGzuNjugNuC6My2btBNCKImOPcUK/utKpvxLPLrsF6Zm5MW5GKymw2kPVBkUKcQBU4qnhzCnW7k5W3ODrauZckQ+hzbJpW1+kF2HzIGa0Fdtk3IsHiCh1y+7RHJwyxId4UBRQ1Sk0MkN8NCPsGg+j1WoL18Nn3xYtELRiYYCbAZxzJXVP6df8LZkRFAFyhMKohvDkv1TDEB0qTPyInnwRyBtgktYMFhiLreeO734J+UqtEkVdCPRxWQ2pX8fT9JeB+TTTyilFRSdXVmlnK7frLXbQiptsvr6TXow30EbBRTm02NkcZAF071RIXirEb95p7G+DqMHP33H5M4TPjgIHX1Ks+oaWLnBFQW5XD2SVgJcDyyt9dd1tsJL6FfoLabsUPa9LxBbymdT1txtcPwCgbTc2CWr0nXTgugC2s3ZbdmtJxckDRUKOhXAow9rg6HkIBvnHwKpoRrl+idw01YJocgvUJvELCFgufF2x1TxxSNl1B7X694qNXU9jAGaC5r64RVseGlD+Uyn4s04zISQzMuwL1c+67StWVietD04oabtRCtK+EmsmTKz3x76OALNXxy9LJrJEhYarj6Ee+1qqUPOV /FPG8v81 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Add Kconfig and Makefile infrastructure. The implementation is located under `mm/kstackwatch/`. Signed-off-by: Jinchao Wang --- 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 + +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