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Thu, 09 Oct 2025 03:57:22 -0700 (PDT) From: Jinchao Wang To: Andrew Morton , Masami Hiramatsu , Peter Zijlstra , Mike Rapoport , Alexander Potapenko , Randy Dunlap , Marco Elver , Jonathan Corbet , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , "Liang, Kan" , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Kees Cook , Alice Ryhl , Sami Tolvanen , Miguel Ojeda , Masahiro Yamada , Rong Xu , Naveen N Rao , David Kaplan , Andrii Nakryiko , Jinjie Ruan , Nam Cao , workflows@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-mm@kvack.org, llvm@lists.linux.dev, Andrey Ryabinin , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , kasan-dev@googlegroups.com, "David S. Miller" , Mathieu Desnoyers , linux-trace-kernel@vger.kernel.org Cc: Jinchao Wang Subject: [PATCH v7 04/23] mm/ksw: add build system support Date: Thu, 9 Oct 2025 18:55:40 +0800 Message-ID: <20251009105650.168917-5-wangjinchao600@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251009105650.168917-1-wangjinchao600@gmail.com> References: <20251009105650.168917-1-wangjinchao600@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam05 X-Stat-Signature: wko8hmsjcrbipjexy4k9ccytxgqszkyh X-Rspam-User: X-Rspamd-Queue-Id: 756C9100013 X-HE-Tag: 1760007444-987876 X-HE-Meta: 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 bxjV1MX4 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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 --- mm/Kconfig.debug | 8 ++++++++ mm/Makefile | 1 + mm/kstackwatch/Makefile | 2 ++ mm/kstackwatch/kernel.c | 23 +++++++++++++++++++++++ mm/kstackwatch/kstackwatch.h | 5 +++++ mm/kstackwatch/stack.c | 1 + mm/kstackwatch/watch.c | 1 + 7 files changed, 41 insertions(+) create mode 100644 mm/kstackwatch/Makefile create mode 100644 mm/kstackwatch/kernel.c create mode 100644 mm/kstackwatch/kstackwatch.h create mode 100644 mm/kstackwatch/stack.c create mode 100644 mm/kstackwatch/watch.c diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug index 32b65073d0cc..24f4c4254f01 100644 --- a/mm/Kconfig.debug +++ b/mm/Kconfig.debug @@ -309,3 +309,11 @@ config PER_VMA_LOCK_STATS overhead in the page fault path. If in doubt, say N. + +config KSTACK_WATCH + bool "Kernel Stack Watch" + depends on HAVE_HW_BREAKPOINT && KPROBES && FPROBE && STACKTRACE + help + A lightweight real-time debugging tool to detect stack corruption. + + If unsure, say N. diff --git a/mm/Makefile b/mm/Makefile index 21abb3353550..4d45fb69116c 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-$(CONFIG_KSTACK_WATCH) += kstackwatch/ obj-$(CONFIG_FAILSLAB) += failslab.o obj-$(CONFIG_FAIL_PAGE_ALLOC) += fail_page_alloc.o obj-$(CONFIG_MEMTEST) += memtest.o diff --git a/mm/kstackwatch/Makefile b/mm/kstackwatch/Makefile new file mode 100644 index 000000000000..84a46cb9a766 --- /dev/null +++ b/mm/kstackwatch/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_KSTACK_WATCH) += 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/kstackwatch.h b/mm/kstackwatch/kstackwatch.h new file mode 100644 index 000000000000..0273ef478a26 --- /dev/null +++ b/mm/kstackwatch/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/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