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Fri, 12 Sep 2025 03:12:17 -0700 (PDT) From: Jinchao Wang To: Andrew Morton , Masami Hiramatsu , Peter Zijlstra , Mike Rapoport , Alexander Potapenko , 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 v4 04/21] mm/ksw: add build system support Date: Fri, 12 Sep 2025 18:11:14 +0800 Message-ID: <20250912101145.465708-5-wangjinchao600@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250912101145.465708-1-wangjinchao600@gmail.com> References: <20250912101145.465708-1-wangjinchao600@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 12A251A000D X-Stat-Signature: pd3b9z6ox8gkc91xm8t7hyejxo3duezj X-HE-Tag: 1757671938-941820 X-HE-Meta: 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 XipuGKna 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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 | 11 +++++++++++ mm/Makefile | 1 + mm/kstackwatch/Makefile | 2 ++ mm/kstackwatch/kernel.c | 22 ++++++++++++++++++++++ mm/kstackwatch/kstackwatch.h | 5 +++++ mm/kstackwatch/stack.c | 1 + mm/kstackwatch/watch.c | 1 + 7 files changed, 43 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..fdfc6e6d0dec 100644 --- a/mm/Kconfig.debug +++ b/mm/Kconfig.debug @@ -309,3 +309,14 @@ config PER_VMA_LOCK_STATS overhead in the page fault path. If in doubt, say N. + +config KSTACK_WATCH + tristate "Kernel Stack Watch" + depends on HAVE_HW_BREAKPOINT && KPROBES && FPROBE + select HAVE_REINSTALL_HW_BREAKPOINT + help + A lightweight real-time debugging tool to detect stack corruption. + It can watch either the canary or local variable and tracks + the recursive depth of the monitored function. + + If unsure, say N. diff --git a/mm/Makefile b/mm/Makefile index ef54aa615d9d..665c9f2bf987 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..40aa7e9ff513 --- /dev/null +++ b/mm/kstackwatch/kernel.c @@ -0,0 +1,22 @@ +// SPDX-License-Identifier: GPL-2.0 +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include + +MODULE_AUTHOR("Jinchao Wang"); +MODULE_DESCRIPTION("Kernel Stack Watch"); +MODULE_LICENSE("GPL"); + +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); 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