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Tue, 09 Sep 2025 22:24:58 -0700 (PDT) From: Jinchao Wang To: Andrew Morton , Masami Hiramatsu , Peter Zijlstra , Mike Rapoport , "Naveen N . Rao" , Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , kasan-dev@googlegroups.com, "David S. Miller" , Steven Rostedt , Mathieu Desnoyers , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , "Liang, Kan" , Thomas Gleixner , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Jinchao Wang Subject: [PATCH v3 03/19] mm/ksw: add build system support Date: Wed, 10 Sep 2025 13:23:12 +0800 Message-ID: <20250910052335.1151048-4-wangjinchao600@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250910052335.1151048-1-wangjinchao600@gmail.com> References: <20250910052335.1151048-1-wangjinchao600@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 57E79160002 X-Stat-Signature: pcc8bw67euqdqsrhb7ye1emhiamxfbg9 X-HE-Tag: 1757481900-654261 X-HE-Meta: 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 bbEhB6mT 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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