From patchwork Fri Feb 10 16:00:54 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Bauer X-Patchwork-Id: 9567035 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 4F94A60573 for ; Fri, 10 Feb 2017 16:12:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3E2A72858D for ; Fri, 10 Feb 2017 16:12:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 33249285AE; Fri, 10 Feb 2017 16:12:35 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A5F6B285A5 for ; Fri, 10 Feb 2017 16:12:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752442AbdBJQL7 (ORCPT ); Fri, 10 Feb 2017 11:11:59 -0500 Received: from mga05.intel.com ([192.55.52.43]:26722 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752186AbdBJQKy (ORCPT ); Fri, 10 Feb 2017 11:10:54 -0500 Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga105.fm.intel.com with ESMTP; 10 Feb 2017 08:10:21 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.35,142,1484035200"; d="scan'208";a="64237603" Received: from sbauer-z170x-ud5.lm.intel.com ([10.232.112.157]) by fmsmga006.fm.intel.com with ESMTP; 10 Feb 2017 08:10:21 -0800 From: Scott Bauer To: linux-nvme@lists.infradead.org Cc: David.Laight@ACULAB.COM, arnd@arndb.de, axboe@fb.com, keith.busch@intel.com, jonathan.derrick@intel.com, hch@infradead.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, Scott Bauer Subject: [PATCH V4 2/2] Move stack parameters for sed_ioctl to prevent oversized stack with CONFIG_KASAN Date: Fri, 10 Feb 2017 09:00:54 -0700 Message-Id: <1486742454-3254-3-git-send-email-scott.bauer@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1486742454-3254-1-git-send-email-scott.bauer@intel.com> References: <1486742454-3254-1-git-send-email-scott.bauer@intel.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When CONFIG_KASAN is enabled, compilation fails: block/sed-opal.c: In function 'sed_ioctl': block/sed-opal.c:2447:1: error: the frame size of 2256 bytes is larger than 2048 bytes [-Werror=frame-larger-than=] Moved all the ioctl structures off the stack and dynamically activate using _IOC_SIZE() Fixes: 455a7b238cd6 ("block: Add Sed-opal library") Reported-by: Arnd Bergmann Signed-off-by: Scott Bauer --- block/sed-opal.c | 132 ++++++++++++++++++++----------------------------------- 1 file changed, 48 insertions(+), 84 deletions(-) diff --git a/block/sed-opal.c b/block/sed-opal.c index bf1406e..d09a089 100644 --- a/block/sed-opal.c +++ b/block/sed-opal.c @@ -2346,7 +2346,10 @@ EXPORT_SYMBOL(opal_unlock_from_suspend); int sed_ioctl(struct opal_dev *dev, unsigned int cmd, unsigned long ptr) { + void *ioctl_ptr; + int ret = -ENOTTY; void __user *arg = (void __user *)ptr; + unsigned int cmd_size = _IOC_SIZE(cmd); if (!capable(CAP_SYS_ADMIN)) return -EACCES; @@ -2355,94 +2358,55 @@ int sed_ioctl(struct opal_dev *dev, unsigned int cmd, unsigned long ptr) return -ENOTSUPP; } - switch (cmd) { - case IOC_OPAL_SAVE: { - struct opal_lock_unlock lk_unlk; - - if (copy_from_user(&lk_unlk, arg, sizeof(lk_unlk))) - return -EFAULT; - return opal_save(dev, &lk_unlk); - } - case IOC_OPAL_LOCK_UNLOCK: { - struct opal_lock_unlock lk_unlk; - - if (copy_from_user(&lk_unlk, arg, sizeof(lk_unlk))) - return -EFAULT; - return opal_lock_unlock(dev, &lk_unlk); - } - case IOC_OPAL_TAKE_OWNERSHIP: { - struct opal_key opal_key; - - if (copy_from_user(&opal_key, arg, sizeof(opal_key))) - return -EFAULT; - return opal_take_ownership(dev, &opal_key); - } - case IOC_OPAL_ACTIVATE_LSP: { - struct opal_lr_act opal_lr_act; - - if (copy_from_user(&opal_lr_act, arg, sizeof(opal_lr_act))) - return -EFAULT; - return opal_activate_lsp(dev, &opal_lr_act); - } - case IOC_OPAL_SET_PW: { - struct opal_new_pw opal_pw; - - if (copy_from_user(&opal_pw, arg, sizeof(opal_pw))) - return -EFAULT; - return opal_set_new_pw(dev, &opal_pw); - } - case IOC_OPAL_ACTIVATE_USR: { - struct opal_session_info session; - - if (copy_from_user(&session, arg, sizeof(session))) - return -EFAULT; - return opal_activate_user(dev, &session); - } - case IOC_OPAL_REVERT_TPR: { - struct opal_key opal_key; - - if (copy_from_user(&opal_key, arg, sizeof(opal_key))) - return -EFAULT; - return opal_reverttper(dev, &opal_key); - } - case IOC_OPAL_LR_SETUP: { - struct opal_user_lr_setup lrs; - - if (copy_from_user(&lrs, arg, sizeof(lrs))) - return -EFAULT; - return opal_setup_locking_range(dev, &lrs); - } - case IOC_OPAL_ADD_USR_TO_LR: { - struct opal_lock_unlock lk_unlk; - - if (copy_from_user(&lk_unlk, arg, sizeof(lk_unlk))) - return -EFAULT; - return opal_add_user_to_lr(dev, &lk_unlk); - } - case IOC_OPAL_ENABLE_DISABLE_MBR: { - struct opal_mbr_data mbr; - - if (copy_from_user(&mbr, arg, sizeof(mbr))) - return -EFAULT; - return opal_enable_disable_shadow_mbr(dev, &mbr); - } - case IOC_OPAL_ERASE_LR: { - struct opal_session_info session; - - if (copy_from_user(&session, arg, sizeof(session))) - return -EFAULT; - return opal_erase_locking_range(dev, &session); + ioctl_ptr = memdup_user(arg, cmd_size); + if (IS_ERR_OR_NULL(ioctl_ptr)) { + ret = PTR_ERR(ioctl_ptr); + goto out; } - case IOC_OPAL_SECURE_ERASE_LR: { - struct opal_session_info session; - if (copy_from_user(&session, arg, sizeof(session))) - return -EFAULT; - return opal_secure_erase_locking_range(dev, &session); - } + switch (cmd) { + case IOC_OPAL_SAVE: + ret = opal_save(dev, ioctl_ptr); + break; + case IOC_OPAL_LOCK_UNLOCK: + ret = opal_lock_unlock(dev, ioctl_ptr); + break; + case IOC_OPAL_TAKE_OWNERSHIP: + ret = opal_take_ownership(dev, ioctl_ptr); + break; + case IOC_OPAL_ACTIVATE_LSP: + ret = opal_activate_lsp(dev, ioctl_ptr); + break; + case IOC_OPAL_SET_PW: + ret = opal_set_new_pw(dev, ioctl_ptr); + break; + case IOC_OPAL_ACTIVATE_USR: + ret = opal_activate_user(dev, ioctl_ptr); + break; + case IOC_OPAL_REVERT_TPR: + ret = opal_reverttper(dev, ioctl_ptr); + break; + case IOC_OPAL_LR_SETUP: + ret = opal_setup_locking_range(dev, ioctl_ptr); + break; + case IOC_OPAL_ADD_USR_TO_LR: + ret = opal_add_user_to_lr(dev, ioctl_ptr); + break; + case IOC_OPAL_ENABLE_DISABLE_MBR: + ret = opal_enable_disable_shadow_mbr(dev, ioctl_ptr); + break; + case IOC_OPAL_ERASE_LR: + ret = opal_erase_locking_range(dev, ioctl_ptr); + break; + case IOC_OPAL_SECURE_ERASE_LR: + ret = opal_secure_erase_locking_range(dev, ioctl_ptr); + break; default: pr_warn("No such Opal Ioctl %u\n", cmd); } - return -ENOTTY; + + out: + kfree(ioctl_ptr); + return ret; } EXPORT_SYMBOL_GPL(sed_ioctl);