From nobody Thu Oct 2 20:27:32 2025 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 6A3632E283E for ; Fri, 12 Sep 2025 10:13:28 +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=1757672009; cv=none; b=RxLJruAR3D+OrP0WC8z52U8NjycbLV6GKq+j2cg80m2xEuz+N4egIQjj2G1Oscx/hLkIbGswJLkqOwbW4Jz29DtNGdMUyy8tk3VCpEu2Jo6YUcT/0VZhqOb08e/ETx3Ydyn69V5Fi8F/KfMpBGqtYNYzqHgHAxjrlLZM80rANKI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757672009; c=relaxed/simple; bh=k6timgyy8B4GPUl9IUPi95Oa04aVieHJCexEN+DVT5A=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DD2nzuGLpBKEUuU3E8C6bi9JQhj9wglYGWpcjLmuPLa3XN9HSTbeJ+KJ0MQLxdOWGMZ/JVA2qbM5G2Q67eldRMrFsPi8Qz4rk/bAy8M39jA3faYG0Fgk5QsbMGasqH0jb+4kPDFHFXmdSRFWyHFgJQ9G1PTcGVOoZL7RKH1vCe4= 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=MwL2Tz0X; 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="MwL2Tz0X" Received: by mail-pl1-f182.google.com with SMTP id d9443c01a7336-24458272c00so18783795ad.3 for ; Fri, 12 Sep 2025 03:13:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1757672008; x=1758276808; 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=C5u/a2s8j5yqiSFbkPas+Re9l+zCPojPRf0oLtuMcdk=; b=MwL2Tz0XVsS+r5ozTCrIlMb06yMsEs8UVob0h1JVcrLV+Z3G355tyMmhBvyDldpfwO gn8PhuE70WA82Rrf4h+uTDiOkgIWnz+qN9b/HBSlPHHODyImOSkbwI8dMr7G6Z/iojfn hDKzeJLbX2gJ/Rmk59EpxX5GRVhwBdoqmH8OpjlNd7GyliXwnoeXtnl8MWvA/n9VCiHX GTovlx31S0rHMtYXf/Za7qkPTd091638SUjb7coZoMWdvCv2h8PJm867sYRfE2+uL7xN yUfme2a6ytDj7+yW4s1GG4ZDlEa92fHzLZPjEPvVTJMXE/lKW2GqRv2d+iZufspPfZYF Jwjg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757672008; x=1758276808; 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=C5u/a2s8j5yqiSFbkPas+Re9l+zCPojPRf0oLtuMcdk=; b=l79270Um7k3x1KF6mbq3EeXVroQ0pnwT9x074yuWMO5iamAAsAovQt/d1atzGPsCeK 5WG9QczHz3x2CbnpECtfap6h+CUInEF8pQFKd0jrT39mFcO+koZVg7/QmXtfcwtW4N8I 6gTej/hJaWtw0Nh6gXuWL/+6d2GSKqvDTgYrdIAKF44MkMAWFAcfu0ork9JWA9sm7TEk XL2Av7GYmdZk6QHZPwZKDLhOzgzkuCkjWkSpxBzNM3MH2hgtsD5sdwNC7KaqdmG0UVUl gZLPqIc4ZgrXlIJYVpIyWFPlJJ7qqHdRNV+hwJNnCl+p+rvrGgDBJDX17hMITvxELCaS jA/g== X-Forwarded-Encrypted: i=1; AJvYcCWWwb6SnJKQl0TLdCJ6cgrabwIhOKvbGjtCG2QGFnGii0OJ80MV4gOGkHViSudMAQojfNIqMoCYraKLP4Y=@vger.kernel.org X-Gm-Message-State: AOJu0YzC+0QcF9zkk06hEL4/Lx3VIEmvLBML46mt83BLv3LQaCoHNf7b OlLc1dyywoQCiMhtauLqtgyWffCslJsNCkZgd3Ko6A3WOzQH9lsgN8Y8 X-Gm-Gg: ASbGncsvYmuFfn6rVFQEhTAVcihGKtqvurOdVQG5OnpFRvzwElYpPxG3yfDJvceiEnH JO35I3wmXPQZH/8D0lPHvLKOlEGRpuzGgm1zuNxtXicCYQlWfVc8oeH20O5y5IsNv0h8K2ZjQg1 T4KWyCtgZiiIRxVwI3HTN+G/tP1wMfuIy8TTfJdhkhMKN9W48m/Ojn6TDRKq6Ke4wge3+JzkNcO nhWI0+Nn8zCBmk1Id7i5q7WJgoUe1klt+Http8Bk1xmnxdxITCH1A4MGVKDPpPmAu4Dv9w7lwGH Iuapy5V4F3p/miEyrjYj2fZZjwfGFvQFGRYHBjhV9ZXvFcW2vElMWgwTIMr72RdNw6rsGfaC28q Q3TKp5ilEMsmyf4b3iqqpjhbfUKnUsrITdBw= X-Google-Smtp-Source: AGHT+IHfq4U4MFqDIc6ZxO6yNatWwL7n6+/zPGuAMGcOfOLtnumo4rnkiu74aB1UWkUMdayihYaGMA== X-Received: by 2002:a17:902:ebc2:b0:24a:ceea:b96f with SMTP id d9443c01a7336-25d24e9dc1dmr34403925ad.24.1757672007735; Fri, 12 Sep 2025 03:13:27 -0700 (PDT) Received: from localhost ([185.49.34.62]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-32dd9509002sm5179465a91.0.2025.09.12.03.13.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Sep 2025 03:13:27 -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 18/21] mm/ksw: add recursive stack corruption test Date: Fri, 12 Sep 2025 18:11:28 +0800 Message-ID: <20250912101145.465708-19-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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a test that triggers stack writes across recursive calls,verifying detection at specific recursion depths. Signed-off-by: Jinchao Wang --- mm/kstackwatch/test.c | 29 ++++++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/mm/kstackwatch/test.c b/mm/kstackwatch/test.c index 2b196f72ffd7..3e867d778e91 100644 --- a/mm/kstackwatch/test.c +++ b/mm/kstackwatch/test.c @@ -150,6 +150,27 @@ static void silent_corruption_test(void) silent_corruption_victim(i); } =20 +/* + * Test Case 3: Recursive Call Corruption + * Test corruption detection at specified recursion depth + */ +static void recursive_corruption_test(int depth) +{ + u64 buffer[BUFFER_SIZE]; + + pr_info("recursive call at depth %d\n", depth); + pr_info("buffer 0x%lx\n", (unsigned long)buffer); + if (depth <=3D MAX_DEPTH) + recursive_corruption_test(depth + 1); + + buffer[0] =3D depth; + + /* make sure the compiler do not drop assign action */ + barrier_data(buffer); + + pr_info("returning from depth %d\n", depth); +} + static ssize_t test_proc_write(struct file *file, const char __user *buffe= r, size_t count, loff_t *pos) { @@ -181,6 +202,11 @@ static ssize_t test_proc_write(struct file *file, cons= t char __user *buffer, pr_info("triggering silent corruption test\n"); silent_corruption_test(); break; + case 3: + pr_info("triggering recursive corruption test\n"); + /* depth start with 0 */ + recursive_corruption_test(0); + break; default: pr_err("Unknown test number %d\n", test_num); return -EINVAL; @@ -202,7 +228,8 @@ static ssize_t test_proc_read(struct file *file, char _= _user *buffer, "Usage:\n" " echo 'test0' > /proc/kstackwatch_test - Canary write test\n" " echo 'test1' > /proc/kstackwatch_test - Canary overflow test\n" - " echo 'test2' > /proc/kstackwatch_test - Silent corruption test\n"; + " echo 'test2' > /proc/kstackwatch_test - Silent corruption test\n" + " echo 'test3' > /proc/kstackwatch_test - Recursive corruption test\n"; =20 return simple_read_from_buffer(buffer, count, pos, usage, strlen(usage)); --=20 2.43.0