From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f182.google.com (mail-pl1-f182.google.com [209.85.214.182]) (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 0B55C2E0B77 for ; Thu, 9 Oct 2025 10:57:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760007445; cv=none; b=hScymeGrPM+/LWgDE0PwnW2TTONTnoj8HV3yqo1FvDdBCxEBhmENKgtUjzz/zKcU3iQ7nu6TcAjkat1mAtomUa4YlSaNOxKb5K+qNnWOUMC0r8szCoZDaafUnwkynufxE2e/vofcKrZOegVCZh01ta4QhUXgSvyAnjUcxSUWeJQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760007445; c=relaxed/simple; bh=Do3nnjeUWGWoTOUsDG3S1B+MUUsKTfHEQU/uiqiZ99Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UoaFwKaUP1fFV245y6AaP9UdjYFPE/pVqu3HO8MLUtECKLLmdOE80qHfDWtwYNGpOjnVwxt8HYJ+Vna4mAWhKhX1s+IIGof4owGk0PSb5wq1y/+yTue6AcO5NQA4DG5xqzyEG6OaNPZMRe+ylNVKJ8LXWY92GNix10zVIMlViQw= 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=K+xF2JDZ; arc=none smtp.client-ip=209.85.214.182 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="K+xF2JDZ" Received: by mail-pl1-f182.google.com with SMTP id d9443c01a7336-28832ad6f64so9171705ad.1 for ; Thu, 09 Oct 2025 03:57:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1760007443; x=1760612243; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=GIQpLOg8aMQquhlHBEOSk3mXNexjDr9DRSMTRRGj0hA=; b=K+xF2JDZqmN029K8yvAViYFeaZp78RAJNvwyWVErHepIxGIU/8oNZMYPgpQ8Dlb/h2 ujIAEl+0IdhqTB2LsAzP4PNKrhV/Fl2by8k+2O2+bxOQTw3+yWIeEpYBnxrGSCq6pv07 xa98GJHD85WGnob1tltKlu83Hm6sqi6uHrQzjs1SLkvEKwD3uHjW6MEHtSqQ/2x9W1Iy 8DjoGO65dQLRuyE+P1ARfIIUvp7JF9hJCFVYF1sP2oEzdBxyaTnUYslX9oU6bWn5ANeX RheP+AF7ss2kuTKTuqc/KlHJBboFmgTkeCaCDmNoaR2anQGZZB7pnyh+uwFMc+eMwX2q LXuA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760007443; x=1760612243; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=GIQpLOg8aMQquhlHBEOSk3mXNexjDr9DRSMTRRGj0hA=; b=NCxphosd8MaGOjt9UwnMShbLXAcOO20hsvOh6m/O7OUuWflQx9WqVNMekLQ3VEyiW0 FSho8gYOERjYbcbvB4c3N2Iaewcd5vyDq3Sqx8zkJVI2o1vt2pubzQGt2sdtQ9XhsxWf iOCAWvVo+UO+DmYXnKFvt2NevOLxLp6xU3zrfzWXUmnkKtq8VC86Ow4e/7bmB1tOoWh9 RX7SokUwt2OLm8r6v1zRYHiGB5mutR6LddHzo7q7wBd1DT26kDAiI6d3St7oEia0TMTf l7eAXFQ8LbOVc3K8I4iL5LkKnmRyKL+5F7Gj8uGwoUQknJDo71+r0ugGs1EWyGK5UGw2 +HyQ== X-Forwarded-Encrypted: i=1; AJvYcCWQ2GfadTfOwBz5mFG50SBOgXUm220Dmmr3mY0CqbSHwN0yIvtVWoIR4iBfcdEreZlhMM3T6gjGu/HgbXZrCZU8@vger.kernel.org X-Gm-Message-State: AOJu0Yzbpu3WvXXYvaVjTDN2EL78I5O8xIQovakMedz6bvPSkxwzv8bZ Lwf3qJZ4af/i9G1EL3FGA5pPYeBC4mwYsjEFksUXKVC639CmwBNXOwj1 X-Gm-Gg: ASbGnctf+fGWOlECqHlMMolbla9vxyf0TrawDNa3MSx0xLsbh3ZV/FHtYp1njcu9lWa +YW+SUjylRY4WoJ4UzvUR0jBU9jYhG06Ad3FnYEy9432X/hlkBET9v1ZDRsp3tHVUt0BUJbPFQd wZXmg7/NhGMsDg116GDYqY/SLGR5JXGvJpz0URSk0XX3puWh8vRWlcdN3mZMLAXpPt6fonQu1XI /ZeaiGFyswRXW5fHzGFHsCLW1Hukf7vVqFY00rR/NGsUzkxk3ykMQWdck+Qkv7CuiZufiRd5wcA weqgEgLu7OxsFpnEpsjizjXGgnLwgaKDdQI9SbOEDmscj1gHpepMmrMZHBZm8VGkfur05z5vo0a 5IojulJY3h5I67v13nG49wydoRB4LCOkkwDX8Ii9ZX7XHBAi4b0yd8MeM1ZsM X-Google-Smtp-Source: AGHT+IHPDBs2nQEEtOyd+SrR9P+qllZOyEoDd+ZmfNYqYrv5SYPcJPc74F2vXkjnYFPY0AXGIsqkQg== X-Received: by 2002:a17:903:9cb:b0:267:c984:8d9f with SMTP id d9443c01a7336-29027266982mr95235515ad.24.1760007443143; Thu, 09 Oct 2025 03:57:23 -0700 (PDT) Received: from localhost ([45.142.165.62]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-33b511135a3sm6722720a91.11.2025.10.09.03.57.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); 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> 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 --- 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