From patchwork Wed Dec 18 17:03:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Donnefort X-Patchwork-Id: 851910 Received: from mail-wm1-f74.google.com (mail-wm1-f74.google.com [209.85.128.74]) (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 4568D1E9B33 for ; Wed, 18 Dec 2024 17:03:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734541423; cv=none; b=CJPr8Yiiygy9d6f42efRWsRLS+AXQdzAFMHPtTIPTJ/3gPQuQ0Kck/KGVFAX5frfrwSu8pGjp5pHdTMvFs+sgqZ3JREp6uPk3qOZeyrItvxHrBUy7ZkW17kC0dOba6Igxuv48LRLX9YBE6W59GUUQMofoqQ7n0IxrQrQw0+UReg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734541423; c=relaxed/simple; bh=iO9isvWf752YGak7VS4cPUz+0yRT5dyL5xaBhozN1yQ=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=KRknZlZ2StxMUT0TDWkbqap2lO5g73qRkjv58gRowU9rBepcH1PE4w5VyW5NAq6uWfu6S2oFPKdX3HPPpcpxKSkvnYkEFgazD+rJiNbO2j16TFfsT6s18ttHJ0gcH9c8NIbvIXme9N6EgYkhht5eaNXOqDhOgZpPs5DVRa60Yr4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=FuCKBR/o; arc=none smtp.client-ip=209.85.128.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="FuCKBR/o" Received: by mail-wm1-f74.google.com with SMTP id 5b1f17b1804b1-436248d1240so37000355e9.0 for ; Wed, 18 Dec 2024 09:03:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1734541420; x=1735146220; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=VfjgK2SOmknIlUUHDKQAA0R+8BaX7+ocU830dMMDKHw=; b=FuCKBR/oHhyYJAj5ovZdtiu7G+6Oz2i0J7T6dPawgJsj1V3OB6OYBvXSK3Z2SaV/MD 3ZZKWcZkf+tAvMW7IuLwQxZUYqL05ipxvP90o8RVdFIi+0w4yu2wi5CFCN13S3Ik2yIK WkPIDRwLmRY0UuZHoivghcWEEZPiv5DjRRB1eUAcG3rA5b0/25he5WKSjiRrpwGtnW30 l58yUO7neGxy9nLR1t+YWj9DwViVufdnaC1O/ErxaQkDYv8PtSNJf9LJbeIuNlcw8Qfm Os73a5Y+3dYpKMFnx760JcYYEQUNvd3UIUf8lYwYHArNthf00naMHZRAeEHCIK/lsBH+ +6+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1734541420; x=1735146220; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=VfjgK2SOmknIlUUHDKQAA0R+8BaX7+ocU830dMMDKHw=; b=scGVLjcNUqevrNEEPTgCG3rwUxxInpBALihmGuWqG7eYas3G8cI/7Q7R407Tghogwq wR8OjEQdaDz9OR37TJr8kbapIb7YGRZCuDnyFncIayySeQunz84PsYnuKtjPUplol565 8AGvXpzHEBdphZZr3ZoCPHYkai1ShM1A3yWV10gZGF/s9mDFR1+cem9APy2bFkGJ3eEK 0KoXKwa7HGKkEe4JHw9hy4pPnZZf4VJrHya4U15F6pSEXQDOoDik9HZ2EJGrLXIVdjGB gNf5BFFWk4iMYPiXYSiK75Qdv52T7eYXN/txLmnc/GwzF4CYQarbA4gUiAZXMXC/ykTh 5qCQ== X-Forwarded-Encrypted: i=1; AJvYcCW229uvef2hyeLi1tIaN0J6xyKO2WIjSE0j597jCEHFhG8dCWmKcHDNo4VJcHhreYjrIEavbWh4g0XOYVHPj6o=@vger.kernel.org X-Gm-Message-State: AOJu0YxOzUtrASWR6cYIINy3Ii+WGqlensGiBk1CgI+QHbJrbJONBtA/ ggCZBFrythCrPfKEPc3YZWzLUm5kPfM5Ar0dD8R2Ch7T42/jolWidSoDzRk1F9CBI1A2cc0e+X6 Cmk/plYMa6w7Obyszpg== X-Google-Smtp-Source: AGHT+IHam9G7o+Bp47zHT8wI+vFS0i5PkVHHYzHjKDxZPXVx54N8saOP/ifSLAMey8jYcZc34wHD0NmTuZLSmZEr X-Received: from wmqc10.prod.google.com ([2002:a05:600c:a4a:b0:434:f0d4:cbaf]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:3596:b0:434:f739:7ce3 with SMTP id 5b1f17b1804b1-4365535f498mr32760275e9.8.1734541419771; Wed, 18 Dec 2024 09:03:39 -0800 (PST) Date: Wed, 18 Dec 2024 17:03:18 +0000 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.47.1.613.gc27f4b7a9f-goog Message-ID: <20241218170318.2814991-1-vdonnefort@google.com> Subject: [PATCH] selftests/ring-buffer: Add test for out-of-bound pgoff mapping From: Vincent Donnefort To: rostedt@goodmis.org Cc: mhiramat@kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, kernel-team@android.com, aha310510@gmail.com, eadavis@qq.com, Vincent Donnefort , Shuah Khan , linux-kselftest@vger.kernel.org Extend the ring-buffer mapping test coverage by checking an out-of-bound pgoff which has proven to be problematic in the past. Cc: Shuah Khan Cc: linux-kselftest@vger.kernel.org Signed-off-by: Vincent Donnefort base-commit: 61baee2dc5341c936e7fa7b1ca33c5607868de69 diff --git a/tools/testing/selftests/ring-buffer/map_test.c b/tools/testing/selftests/ring-buffer/map_test.c index d10a847130fb..a58f520f2f41 100644 --- a/tools/testing/selftests/ring-buffer/map_test.c +++ b/tools/testing/selftests/ring-buffer/map_test.c @@ -233,12 +233,18 @@ TEST_F(map, data_mmap) ASSERT_NE(data, MAP_FAILED); munmap(data, data_len); - /* Overflow the available subbufs by 1 */ + /* Offset within ring-buffer bounds, mapping size overflow */ meta_len += desc->meta->subbuf_size * 2; data = mmap(NULL, data_len, PROT_READ, MAP_SHARED, desc->cpu_fd, meta_len); ASSERT_EQ(data, MAP_FAILED); + /* Offset outside ring-buffer bounds */ + data_len = desc->meta->subbuf_size * desc->meta->nr_subbufs; + data = mmap(NULL, data_len, PROT_READ, MAP_SHARED, + desc->cpu_fd, data_len + (desc->meta->subbuf_size * 2)); + ASSERT_EQ(data, MAP_FAILED); + /* Verify meta-page padding */ if (desc->meta->meta_page_size > getpagesize()) { data_len = desc->meta->meta_page_size;