From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 78B6E30275B for ; Fri, 21 Nov 2025 19:40:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763754029; cv=none; b=OMFEfcX6ufRVrdle892r4P3dCZudrBHzo/81JZ/VY5RJd/TH67P34DSyLHPs2i5sLi6marYtzoKY4lwoid58HZC93n+TmHP5k+mbRMaU7Y1LJpgXBHN6O91oC5Wwy+82QLMWBeY1IeCnx1LFVN71CF8gCzf+Dqnquxd8pN++n8k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763754029; c=relaxed/simple; bh=sY+GLnH/NB6QUi9wxr+aVON0cHdYrC+5LV2ZVdrO4kc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=JVg8QcyRlP7G9VEiZfkhp7Rn5ztGqY8FNt5iu3PmR/K4/3SWZQPhnbNYXeytJSM6qe5m8RGPoYf1xBoiFokw7KT+GRze5UqQ0vMM+zpJzjq63YinnL2RGRezUd3ZEMbDCyVpPCpA1f1rd15VhlMIKAOakX2OfKzlBxomQ/0mVTA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--morbo.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=C6wBoMQ5; arc=none smtp.client-ip=209.85.216.73 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--morbo.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="C6wBoMQ5" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-3436e9e3569so5126119a91.2 for ; Fri, 21 Nov 2025 11:40:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1763754027; x=1764358827; darn=lists.linux.dev; h=content-transfer-encoding:cc:to:from:subject:message-id:references :mime-version:in-reply-to:date:from:to:cc:subject:date:message-id :reply-to; bh=5ObV+Zk4UGl+OHKUlzzzuAGKm0snV0PrXsMvOzsuqro=; b=C6wBoMQ5wPgopvlSzWrhwr7d5SAnaZffda/zS/XpgNVk976BbXgV97HN21Sp1xS1H8 EC5FwWrCIV7TzAm/iUDYbXuoybG6myqcQv/LDM7C73rmfj6GIJMj4rQtjaiWBz9I0QxU /fBRwMo6QgGAQQe7RCmJ62bluGr6Hn9ALqbExACQ8sxOq9UU/PbCSZ1xqjDmndV68jBz 8VGiRYMa6dAl++iBQivKE5kgNxdlSdOuEFl8TwrxQjGUQN5SImiQI1G0otczsde6n+wi AuogWShY6QEWnrKpXzrfVHcl6nxoCklSMGi+ysUfTCUnEretMWxNhkr9KiN+J3kZUOH2 k2LA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763754027; x=1764358827; h=content-transfer-encoding:cc:to:from:subject:message-id:references :mime-version:in-reply-to:date:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to; bh=5ObV+Zk4UGl+OHKUlzzzuAGKm0snV0PrXsMvOzsuqro=; b=EDe696K2hhwQ9JizQBQpjt2HJrZWCf84/78NhZQfi7Ah/596qR2n8BAemLyHcasru2 qzUp/hmQHN3xFWmMCggTORd0xc4KJ/SLcnUeCqGjE9v2NKbfx7PGoEBgDFDUaSCPa9iW 7hFfKclLO4wVySqOrJgYfJfzp+MlQUPWTaO71XNEYTSJrMMRHNaMxyyJo+0AljGfgMwB aDya3IHj4Iz3+RT90PEJGSgYi6fP8Zur6vdlIAILC2QlzJ+6HJnzPQIM9fkTwI6iYKl8 YAngaE5PoBMSQFtcy+PlF0s9jgL9CYTZA/KIs2qTql/qQ9/RlF/v+A/0rQRQxHqNgnAW 4Ebg== X-Forwarded-Encrypted: i=1; AJvYcCV3+TSvbrczGFq6A55Knu/0WwY4WleCB3M5ai4nNlNTJHIr48Al1gI/H4/w+vXqQp4vnenV@lists.linux.dev X-Gm-Message-State: AOJu0YwoYyqVMkmB/v7cbgNNeyCiG1pxI4rZcRIp3SibBtoAynYAxSbi mktgHNkx0BOw9Q1LnIFevm3Jv99aQMmty9H0c3ydZhIK2bH2Lx6PzOCI+W7M6iXPBa/d4ekWlty l X-Google-Smtp-Source: AGHT+IHYGh5zV/fY6RILJsIKpbvv1F1nIeTXt6YbFfyOedqnc8pj8XMUszI38AOKmYkoqII6p7rKJtxK2Q== X-Received: from pjbch15.prod.google.com ([2002:a17:90a:f40f:b0:33b:9e06:6b9]) (user=morbo job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:274c:b0:32b:9506:1780 with SMTP id 98e67ed59e1d1-34733e60873mr4100051a91.9.1763754026636; Fri, 21 Nov 2025 11:40:26 -0800 (PST) Date: Fri, 21 Nov 2025 19:39:44 +0000 In-Reply-To: <20251121193957.1655580-1-morbo@google.com> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251121193957.1655580-1-morbo@google.com> X-Mailer: git-send-email 2.52.0.rc2.455.g230fcf2819-goog Message-ID: <20251121193957.1655580-3-morbo@google.com> Subject: [PATCH 2/2] memblock: annotate struct memblock_type with __counted_by_ptr From: Bill Wendling To: linux-kernel@vger.kernel.org Cc: Bill Wendling , Kees Cook , "Gustavo A. R. Silva" , Nathan Chancellor , Nick Desaulniers , Justin Stitt , Miguel Ojeda , Peter Zijlstra , Andrew Morton , Heiko Carstens , Marc Herbert , Uros Bizjak , Tejun Heo , Jeff Xu , "=?UTF-8?q?Michal=20Koutn=C3=BD?=" , Shakeel Butt , "=?UTF-8?q?Thomas=20Wei=C3=9Fschuh?=" , John Stultz , Christian Brauner , Randy Dunlap , Brian Gerst , Masahiro Yamada , Mike Rapoport , linux-mm@kvack.org, linux-hardening@vger.kernel.org, llvm@lists.linux.dev Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Add the '__counted_by_ptr' attribute to the 'regions' field of 'struct memblock_type'. The 'regions' field is an array of 'struct memblock_region' and its size is tracked by the 'max' field, which represents the total number of allocated regions. This annotation allows the Kernel Address Sanitizer (KASAN) to detect out-of-bounds accesses to the 'regions' array. Cc: Kees Cook Cc: "Gustavo A. R. Silva" Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Justin Stitt Cc: Miguel Ojeda Cc: Peter Zijlstra Cc: Andrew Morton Cc: Heiko Carstens Cc: Marc Herbert Cc: Uros Bizjak Cc: Tejun Heo Cc: Jeff Xu Cc: "Michal Koutn=C3=BD" Cc: Shakeel Butt Cc: "Thomas Wei=C3=9Fschuh" Cc: John Stultz Cc: Christian Brauner Cc: Randy Dunlap Cc: Brian Gerst Cc: Masahiro Yamada Cc: Mike Rapoport Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org Cc: linux-hardening@vger.kernel.org Cc: llvm@lists.linux.dev Signed-off-by: Bill Wendling --- include/linux/memblock.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/memblock.h b/include/linux/memblock.h index 221118b5a16e..ba7f7c999a45 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -91,7 +91,7 @@ struct memblock_type { unsigned long cnt; unsigned long max; phys_addr_t total_size; - struct memblock_region *regions; + struct memblock_region *regions __counted_by_ptr(max); char *name; }; =20 --=20 2.52.0.rc2.455.g230fcf2819-goog