From nobody Tue Dec 2 01:27:29 2025 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 78BF8302CA3 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=qkPzJWFIhoqfLWPqPeI7X/mEK4zjIE1FBjYrbyJJ/sL8u2T5vZuvx3ebvVlIkplXlwo9HvV0z2lNzcXM1+Ri/IB5WhA20lfWv+j47HjO6XQFI3oYH0cTXQPpTLCSqAOb0otVgrhe+GTjwmcZPhb6WbeLIlOG0nF3+Od5jySHQkM= 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=joCIlGjT; 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="joCIlGjT" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-3436e9e3569so5126124a91.2 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=vger.kernel.org; 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=joCIlGjTXlSM/zdKWkZ4/+N/IzZ02BQstIWwN/Nct5XHXa+dxswi+lYAGKavtoDFUb N60f824/ngrBybRPKaTVWF/Z0dnTqxul6cXgyjN/AMU8l9ta7wdXvYs8Jz81WqsE0wVl 01wnoUiDUEU5SQeGIZJ5TB30dcgSUEEwpNjMOy1rTh2f8VEB34+l+hiEh8CqazquAUJV uH6Rf5eLkyfgOYcOWGy4ukDeyXg2I37tDPDarANnTCQtcQOeXSsD19h+vcdmMEpt+ii6 JCGK/+I65BF9K43MuZNZuqIpeVIb8bPo4NYd8PpyfByRA4SKfZeZz5uG5z3/f+41lElv +fXw== 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=bRnYMus2gQPa5/8txiFolfStB1bT4HccnZwam2OQjVBwjI5cOQUc6IxkgMw3sQL7a/ ZLBCQPCUU6rkQIzWb39Dw+IBELwuFLXwDhlY/1d4rOXGLr2reiF7GdO/Vo76JA+lOrem zNfFfSbH9LK91mWwQIBvDN0jNCPzgStjAgSDnm46rcO+mhISvZ7fPUTf4TqallHsiUMA reO17kn/+1ZY0tW5SbjRiU2ND97bC56mdMkBcVW6hljK25f7qsVPw5oQIg/hU5rLWaWX L1AkR26lkELWqz5LSZF8sLZ75H1yYw9a2GOcKBdxXuDc9KvCtbJh3fbDRacElI/qSiyr ZRFw== X-Gm-Message-State: AOJu0Yx7PS7SnSRkQrg6EzFYO57JEGUg75jC7I7pl+MSWKPWGVOA+1at ENpkGq0Lf1YIju9Fb3kNvBCElazAjt59+yu1Yf1Pgp+A/9FNK8PzD/VByz9SiHVb6MtWK/0ae2E /psTEvuqn+alrE9LT+GEEuwVl3K90wXpqFwUacdXwEBoCEr4cw8OGCu1/WIuYPZjY3pxS999rty j/00NJnxRIP14tL3GCobLcZOWQYEWZmtF7QCt6hQ== 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: linux-kernel@vger.kernel.org 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-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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