From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f176.google.com (mail-pf1-f176.google.com [209.85.210.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 818C62F6937 for ; Mon, 10 Nov 2025 16:37:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.176 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762792623; cv=none; b=ta2TRwmAJoGvB4micS3lJN/xTCVVUGX37i2wPW6BdXX7xHUzwqjeDq0hI1iO4/TvjrJk9CS18NKkCrb7u+yW2Yg1wWtO0sMHuX2rj9OErPYW4wS4yfUBH+jUmyujh4JfHwxIZl6H0mfuaMtBv02LghLbFfND13dCSjnlXooEcqg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762792623; c=relaxed/simple; bh=PyR/1C/G7IpUGl4mLUfLzY/550ANKp9vcF1hQ7PDNTc=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=EvF2PGUAMPEMasQ0X6MvHMtlN8bq0wZE/AQuYUD58i30bQ3r8El+U3Y3KxXFh1xnMJJzO/hTMN23brbu/qMjacwf8Oa2WLKH1+4YMAuvo31gTINlxSlTS2dVikYNW/xaj46OJGSEukVza0ygr52yqj36QBJEKHq99oJcgVojitc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=cJ7QzKd4; arc=none smtp.client-ip=209.85.210.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="cJ7QzKd4" Received: by mail-pf1-f176.google.com with SMTP id d2e1a72fcca58-7833765433cso3654300b3a.0 for ; Mon, 10 Nov 2025 08:37:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1762792619; x=1763397419; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=3XURKXnAmZnyauprzc95LAi6JcC8IVZIZCwVkARWD9E=; b=cJ7QzKd4JpyYdNppBQQ/Kfo20vq4KOUASijWOu5m3zhCssi7oiv05+C+KpocyAj3kj DT2MsdJTrf+iMWfcyDVIt4KgaLX566n0d3AZwko9CK3/IIxZ+PNgOw+jrvBBIu/dhhn7 FVJULocjMpt2tbiFVaZOsE3jHwzUYHYtO8GamBsfbj0n8fPmly/nyCDWM8k/4EtWvi8z tfztH5SWLsI/pBvb5z6Lw/uO013/7SdWvWbjVPJ7z/15bV4s55zgOYwxQgQ2bR3H2+Eq Q14BS03/i/8J4e+QweERGzkXfOJ1b/CtslKoAP3HBJRKgFnSXbHVl71Q0x0qecldIq2B 0n4A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762792619; x=1763397419; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=3XURKXnAmZnyauprzc95LAi6JcC8IVZIZCwVkARWD9E=; b=Qzzk+yWzQREXmRX/6JFALCum1Ywlfg4gHgiiLpF1b29SKIp0EG1YUkkaHpyH2GYRCV Rk8aNZ33CTyXfSDy2samp8CkfSGyIeOcFjRpddaszJJic1GYGdMToioR6Sga7N6F/cui 5IsOsOsgswQC9/zEh1SPIEM+tMfN3RqpvbS2FUq4NJbV/1CVM0O1vuk9FvkNFb2D0MG8 1RwCZaNriO2YXtnxr+X04UyhBQwnIMPm2s4lFu+czAiyrjSMyFH6QNjEE9Kf9B7IZn63 jz5DpfJDqihlVDnWkUFRw5oEmcpFbUkwexQ/O/oOnKBJ/xJ+RD4QwdYrBrDX6vYkIdDq oIoQ== X-Forwarded-Encrypted: i=1; AJvYcCU6BHAUIsy5hiT7zV7REzWGlMypUy6bFamlw9NyzykV7Yq2EOK97tL6wwa1ovTfDAuBCwxoFn5LIC/0rSMgFkrO@vger.kernel.org X-Gm-Message-State: AOJu0Yw3BSrhGBiRNgGNFiVdBlKUNRzkDT/D/S4YjdL19tBefMPDqGZ4 AOqvS1UcDzSis2OANxDTPbVu2C5uSGDhvUCLupqvGWs7Fb6nvaEExIMq X-Gm-Gg: ASbGncsMAvuqyPwBs6OH1IFhg4k9qnM9hqbQFihX2xFAVJhW32WjWa7HatGdLq53f+z cvdSayOuFCpinLs+/WNNTDQgRsi1Tm2hd4bJVLvHXyjBY5L0WZxFF6tGyymYbWvh/7ifLh8oh8Y 4mXwCNAacXlKD6EW9QRQV6703fubnUu5BReJ3pohwWwB/o+3pZD2yrkA/H6UicVHJm3uLjYcAkb hXxC6686Yosl13wtjQ+Weu1yC1MGc2C0cC3XEYhmYt9aELHz9kvTOPBMI1D7yNyxiiitWm1mcyH OgAFWlMXSGIWEbcQCDZIArFY8cp1q8PHdDvpA8y+DG95y7dxphqLNAgE3zv5Yqo33ihVL1STK3s XaMjjLyJke4NKGFGgVqwjdGitVl0p7QVyHysNlgL1uSrO5BVMSU+8sZZY4ljZ/SWbVFixSjIf0K 7JbAMTlbkl0xiPAy1vk/CvHQ== X-Google-Smtp-Source: AGHT+IE4ra3aOU6AC3VY9Gg6aAiRBbZVp1TeJobqAmTS20aSxV2gTSQJIElDd/SxyV53Mq4DKRR9AA== X-Received: by 2002:a05:6a21:681:b0:334:97a6:17f2 with SMTP id adf61e73a8af0-353a18b7968mr11417885637.14.1762792619356; Mon, 10 Nov 2025 08:36:59 -0800 (PST) Received: from localhost ([103.88.46.62]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-ba900eab130sm13106983a12.25.2025.11.10.08.36.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); 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> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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