From patchwork Wed Feb 28 20:41:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 13575949 X-Patchwork-Delegate: kuba@kernel.org Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1E9BD70043; Wed, 28 Feb 2024 20:49:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.17 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709153389; cv=none; b=rLt5856WQuBj8mieEEjC43sLL244EwMtjO1Wx4B4+zHO5h29rCNQ8dVjJq6xVWuV2yGHevkYyd+miykkLWRb+xbUWeJ6XnHZHVmWenKjYtBIsC9uku3q4KFFfsBqJb39bR8UhBjDmrKkUKdrX/P6Ch7xXiYtiB4teQYeh/zfKlw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709153389; c=relaxed/simple; bh=F4b2geX9W5KhXMqEu52b1/d3qPI5zOp6cxLtiYLUnNE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SqnoIAWR5oJNPkQss2PxqD+CUoxEOce/LfejPiVyWmVzORnozwPwlYOEY+3Byfg8NANbcMN6D2Isf6Lf+JbKxGjWQ2S1RM6fPGHiWjbaYgDUNpfjG3ElsB8g4GB69Y6E9vkJUl8eufVGP1KYfTVJmXs/2YjwVFptJvm6gFs9W6g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=F/gkgw7Y; arc=none smtp.client-ip=192.198.163.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="F/gkgw7Y" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1709153387; x=1740689387; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=F4b2geX9W5KhXMqEu52b1/d3qPI5zOp6cxLtiYLUnNE=; b=F/gkgw7YM9B+7loM2W0xpqJ6jU57HuXvleaDALSY3xUIkht9c2Uqq2if 1aCwAGj6DK5nwW7qgwzqB/VqHjhle1XB9yMxqu3/x0eiADWoVNNu3rTpm sqoeXt2/sj8R2OYBn27EIOl0d0F4FRN4FPoIAzAPHYac+E89ShrkltgIU qsOAujLc7sR2VoDzzr82BeHQTz/SyFzcQ/lP+G4RAYwNP7P4w7NKvp/bO 4mmqY/mOZWHCxcaXViIKhC7OrKpdGUGCmoYE+V2Yy6ofYV+v+DyXCBKDF cQ8fJYmxhMjhrrUIzP1S5rmCy1JB/eiFzFT0FbhCv7wz0DJ7XGyPzEN2Y g==; X-IronPort-AV: E=McAfee;i="6600,9927,10998"; a="3428771" X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="3428771" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Feb 2024 12:49:46 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10998"; a="937034664" X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="937034664" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 28 Feb 2024 12:49:41 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 5F749631; Wed, 28 Feb 2024 22:49:34 +0200 (EET) From: Andy Shevchenko To: Vinod Koul , Linus Walleij , Jonathan Cameron , Andy Shevchenko , Mark Brown , Kees Cook , linux-arm-kernel@lists.infradead.org, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, linux-spi@vger.kernel.org, netdev@vger.kernel.org, linux-hardening@vger.kernel.org Cc: Jonathan Cameron , Lars-Peter Clausen , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "Gustavo A. R. Silva" Subject: [PATCH v4 7/8] net-device: Use new helpers from overflow.h in netdevice APIs Date: Wed, 28 Feb 2024 22:41:37 +0200 Message-ID: <20240228204919.3680786-8-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.43.0.rc1.1.gbec44491f096 In-Reply-To: <20240228204919.3680786-1-andriy.shevchenko@linux.intel.com> References: <20240228204919.3680786-1-andriy.shevchenko@linux.intel.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org We have two new helpers struct_size_with_data() and struct_data_pointer() that we can utilize in alloc_netdev_mqs() and netdev_priv(). Do it so. Signed-off-by: Andy Shevchenko --- include/linux/netdevice.h | 3 ++- net/core/dev.c | 10 +++++----- 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index c41019f34179..d046dca18854 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -25,6 +25,7 @@ #include #include #include +#include #include #include #include @@ -2668,7 +2669,7 @@ void dev_net_set(struct net_device *dev, struct net *net) */ static inline void *netdev_priv(const struct net_device *dev) { - return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); + return struct_data_pointer(dev, NETDEV_ALIGN); } /* Set the sysfs physical device reference for the network logical device diff --git a/net/core/dev.c b/net/core/dev.c index 69c3e3613372..80b765bb8ba2 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -10859,12 +10859,12 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, return NULL; } - alloc_size = sizeof(struct net_device); - if (sizeof_priv) { + if (sizeof_priv) /* ensure 32-byte alignment of private area */ - alloc_size = ALIGN(alloc_size, NETDEV_ALIGN); - alloc_size += sizeof_priv; - } + alloc_size = struct_size_with_data(p, NETDEV_ALIGN, sizeof_priv); + else + alloc_size = sizeof(struct net_device); + /* ensure 32-byte alignment of whole construct */ alloc_size += NETDEV_ALIGN - 1;