From patchwork Wed Feb 8 22:56:16 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Bauer X-Patchwork-Id: 9563759 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 4CF106020F for ; Wed, 8 Feb 2017 23:18:31 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 041602852B for ; Wed, 8 Feb 2017 23:18:31 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EB22028532; Wed, 8 Feb 2017 23:18:30 +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=ham 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 4F4232852B for ; Wed, 8 Feb 2017 23:18:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751153AbdBHXS3 (ORCPT ); Wed, 8 Feb 2017 18:18:29 -0500 Received: from mga09.intel.com ([134.134.136.24]:31738 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751149AbdBHXS2 (ORCPT ); Wed, 8 Feb 2017 18:18:28 -0500 Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga102.jf.intel.com with ESMTP; 08 Feb 2017 15:05:44 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.35,348,1484035200"; d="scan'208";a="223015675" Received: from sbauer-z170x-ud5.lm.intel.com ([10.232.112.157]) by fmsmga004.fm.intel.com with ESMTP; 08 Feb 2017 15:05:43 -0800 From: Scott Bauer To: linux-nvme@lists.infradead.org Cc: 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] Move stack parameters for sed_ioctl to prevent oversized stack with CONFIG_KASAN Date: Wed, 8 Feb 2017 15:56:16 -0700 Message-Id: <1486594576-1621-1-git-send-email-scott.bauer@intel.com> X-Mailer: git-send-email 2.7.4 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 to a static union to prevent oversized stack frame size. Fixes: 455a7b238cd6 ("block: Add Sed-opal library") Reported-by: Arnd Bergmann Signed-off-by: Scott Bauer --- block/sed-opal.c | 187 ++++++++++++++++++++++++++++++------------------------- 1 file changed, 102 insertions(+), 85 deletions(-) diff --git a/block/sed-opal.c b/block/sed-opal.c index bf1406e..b88867d 100644 --- a/block/sed-opal.c +++ b/block/sed-opal.c @@ -2344,8 +2344,21 @@ bool opal_unlock_from_suspend(struct opal_dev *dev) } EXPORT_SYMBOL(opal_unlock_from_suspend); +static union { + struct opal_lock_unlock lk_unlk; + struct opal_key opal_key; + struct opal_lr_act opal_lr_act; + struct opal_new_pw opal_pw; + struct opal_session_info session; + struct opal_user_lr_setup lrs; + struct opal_mbr_data mbr; +} u; + +DEFINE_MUTEX(ioctl_lock); + int sed_ioctl(struct opal_dev *dev, unsigned int cmd, unsigned long ptr) { + int ret = -ENOTTY; void __user *arg = (void __user *)ptr; if (!capable(CAP_SYS_ADMIN)) @@ -2355,94 +2368,98 @@ int sed_ioctl(struct opal_dev *dev, unsigned int cmd, unsigned long ptr) return -ENOTSUPP; } + mutex_lock(&ioctl_lock); 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); - } - 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); - } + case IOC_OPAL_SAVE: + if (copy_from_user(&u.lk_unlk, arg, sizeof(u.lk_unlk))) { + ret = -EFAULT; + goto out; + } + ret = opal_save(dev, &u.lk_unlk); + break; + case IOC_OPAL_LOCK_UNLOCK: + if (copy_from_user(&u.lk_unlk, arg, sizeof(u.lk_unlk))) { + ret = -EFAULT; + goto out; + } + ret = opal_lock_unlock(dev, &u.lk_unlk); + break; + case IOC_OPAL_TAKE_OWNERSHIP: + if (copy_from_user(&u.opal_key, arg, sizeof(u.opal_key))) { + ret = -EFAULT; + goto out; + } + ret = opal_take_ownership(dev, &u.opal_key); + break; + case IOC_OPAL_ACTIVATE_LSP: + if (copy_from_user(&u.opal_lr_act, arg, sizeof(u.opal_lr_act))) { + ret = -EFAULT; + goto out; + } + ret = opal_activate_lsp(dev, &u.opal_lr_act); + break; + case IOC_OPAL_SET_PW: + if (copy_from_user(&u.opal_pw, arg, sizeof(u.opal_pw))) { + ret = -EFAULT; + goto out; + } + ret = opal_set_new_pw(dev, &u.opal_pw); + break; + case IOC_OPAL_ACTIVATE_USR: + if (copy_from_user(&u.session, arg, sizeof(u.session))) { + ret = -EFAULT; + goto out; + } + ret = opal_activate_user(dev, &u.session); + break; + case IOC_OPAL_REVERT_TPR: + if (copy_from_user(&u.opal_key, arg, sizeof(u.opal_key))) { + ret = -EFAULT; + goto out; + } + ret = opal_reverttper(dev, &u.opal_key); + break; + case IOC_OPAL_LR_SETUP: + if (copy_from_user(&u.lrs, arg, sizeof(u.lrs))) { + ret = -EFAULT; + goto out; + } + ret = opal_setup_locking_range(dev, &u.lrs); + break; + case IOC_OPAL_ADD_USR_TO_LR: + if (copy_from_user(&u.lk_unlk, arg, sizeof(u.lk_unlk))) { + ret = -EFAULT; + goto out; + } + ret = opal_add_user_to_lr(dev, &u.lk_unlk); + break; + case IOC_OPAL_ENABLE_DISABLE_MBR: + if (copy_from_user(&u.mbr, arg, sizeof(u.mbr))) { + ret = -EFAULT; + goto out; + } + ret = opal_enable_disable_shadow_mbr(dev, &u.mbr); + break; + case IOC_OPAL_ERASE_LR: + if (copy_from_user(&u.session, arg, sizeof(u.session))) { + ret = -EFAULT; + goto out; + } + ret = opal_erase_locking_range(dev, &u.session); + break; + case IOC_OPAL_SECURE_ERASE_LR: + if (copy_from_user(&u.session, arg, sizeof(u.session))) { + ret = -EFAULT; + goto out; + } + ret = opal_secure_erase_locking_range(dev, &u.session); + break; default: pr_warn("No such Opal Ioctl %u\n", cmd); } - return -ENOTTY; + + out: + mutex_unlock(&ioctl_lock); + return ret; } EXPORT_SYMBOL_GPL(sed_ioctl);