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 E548323816D for ; Tue, 30 Sep 2025 02:44:35 +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=1759200277; cv=none; b=oU8150WuDj8KC4vtL7LrfCLvUWkshdZp831WnPaLKTqxZa77VtWHc3p6BiCHlN2Ky504HeaS0mHe6cW4OLnHSt/vEb4Uplb52cqZxKCXjcyA/9OjOjhkDfuwLbVwx9l8oM/R+lqk5oBOQ5W3ikzT9dZyanfSXnRWB3DW/lpA59A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759200277; c=relaxed/simple; bh=boxEQn+lY/C6jkvJZFjK01G2rW6t0U2zmcOwIq1YIoI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NPZgej8XCILJMdgHxUVzYeGXueWqYOBfdgEaADdAX6Ru40tfYA2nJKfovZnPLwFaWT9vrjrot1CpdIxsXpAAZMPOLpS9BXZ5Eri7iSNJTJt4fGeHhRhS03oS8brv8/V0t8Ygd8t03XcGpSaYsAM9ZayScZfTGg6Nb5ezDZfjEOI= 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=bC2DSGZK; 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="bC2DSGZK" Received: by mail-pf1-f176.google.com with SMTP id d2e1a72fcca58-77f7da24397so4519170b3a.2 for ; Mon, 29 Sep 2025 19:44:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1759200275; x=1759805075; 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=DLL9szq8LgdVljgQmrpuYN0dKjRbhwJ4oBDbEm6eF/Y=; b=bC2DSGZK64bV0V4VwYrPhZ87NyeXrn4N1/gDgu1QEAOXxYyoDSWwqTIgW99eX8D002 ebw+gg2ofPjgYVxo6cmu0TKU6yEwfgV6lPJUNynSobkRUUfzwwH/jWcXpZME4rEhNruv o1ENNjwOKRbZttzLmaSAspqTNbeUqc6p72F57f2qpAf7P0cbk1FqS+NYLJTlNdOBS42z dGsJDosoIATTiqmpD5NerWCnQSqE8nhPEHMW2fJS+GsNInj7jmXDr2KT6wgyWqvptTbR O37aE88YOo/Q3Ul9XUCYjzzosK7dAjZPiauwMt9Nwsowbb8VAP6KJR/yjsHTeUzR56mc 9gMg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1759200275; x=1759805075; 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=DLL9szq8LgdVljgQmrpuYN0dKjRbhwJ4oBDbEm6eF/Y=; b=o84vyJGP0OqsromuhQl1XpAJpkM751viUWJ5YLo6YBYgyA/W+pBxx4NS98/z2XP6Py uPLshEBkhFkn2dy/y3n6MGiZfKkdDCwHBVJ2rC1M+gCEdbuBcWZcMl1VNG/GKdNUgdqe HM1Z+XRAQ+xU7Txu0XARWll+2Swg2H7VDGx8r81JweDVCRyspsRdksWQPZebtkAOKbkJ 8/H+A++Jdeln16Yh6bD/r9xJauSpRTEYBJ08YTeiZGZgqbRopYxObzVAq8SkEzyI7cMJ 6C31rLCe+4qz+oFr6x80PTxjykSlguGABCzJnTzqVDlMAAKEDEkcAcz/IiU39j0yr5Am NeaA== X-Forwarded-Encrypted: i=1; AJvYcCWLSsPuIn01Zvg9oKwctEK+on6wSEYjnogykUNOg+DJQhwVdvxz7ciKA/LzodTCjh1wU1eB7WlrRkc=@vger.kernel.org X-Gm-Message-State: AOJu0YxKdSEIfxt5wKjzLNrvKuVPk+e14sapRGUPnu0HWHLKmUa6lijE WxdhhUpGKRkqqbSNuHYi/NBZta/fYVNlQvnvKjFMV+O/jkKmvxKvO3Zl X-Gm-Gg: ASbGncuXdwp50gpUvGpwJ7fN8VOQSz9VSnWYt8CPEC5lQDlidir9h8AnmlrbiDteoWN QrmrJ2r9uVkW/GFRj6ihRW37fr3zUAeXnfy7qrBP3C9vM9hy5I4he9qQ4kMttqMX89fWm/1jmXG cWgFw2Di1SjOhyMYlPDyWUEoE1Mvw25JDQKdCjfY0drbav/kmahMdsD/hRVKaBGchZ1iTm8Rsje F6+d0v67LuJ6iVlVRrUyfqNp00PGrTDSHQl1LyqAoPiztYe+f0HwW8pjFGaAvCtFp1cckbGY0Xi r3gJRFyt+ZaClnaFBg3QGtImof3zeTOiulCupVkV/ymOkkH0lTlROr2Q+qK0vY4DfPpPRAeIXta FkiusovIwp6S8b7y3oGja7Piqj53OzGO4OMr8ckAkKQ89vTtYM4liAyo+2TnkTzkd89NAwF14T6 bK X-Google-Smtp-Source: AGHT+IFKAUJd50skyQZezOIyRCzitP2KYWlsYqho8uHybu50MFOQdhfyrcEbVkIiLwip8Qb7gZ0ySg== X-Received: by 2002:a05:6a00:4b46:b0:77f:416e:de8e with SMTP id d2e1a72fcca58-780fceb5040mr19851033b3a.26.1759200274983; Mon, 29 Sep 2025 19:44:34 -0700 (PDT) Received: from localhost ([45.142.167.196]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7810238f11esm12449091b3a.19.2025.09.29.19.44.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Sep 2025 19:44:34 -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 v6 04/23] mm/ksw: add build system support Date: Tue, 30 Sep 2025 10:43:25 +0800 Message-ID: <20250930024402.1043776-5-wangjinchao600@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250930024402.1043776-1-wangjinchao600@gmail.com> References: <20250930024402.1043776-1-wangjinchao600@gmail.com> Precedence: bulk X-Mailing-List: linux-doc@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 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..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