From patchwork Mon Mar 15 13:53:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 401323 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1344CC433E9 for ; Mon, 15 Mar 2021 14:04:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C899A64DAD for ; Mon, 15 Mar 2021 14:04:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234586AbhCOOE0 (ORCPT ); Mon, 15 Mar 2021 10:04:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:36788 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233076AbhCOOAh (ORCPT ); Mon, 15 Mar 2021 10:00:37 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 96C0E64F58; Mon, 15 Mar 2021 14:00:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1615816821; bh=S1BbKy6q2HCjd0Xn0FIRamlpdFxiUnCa3lPMMw2415k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LdqTdNZ5s6vAGeky+0RJ/r2YSdVAIoChHaZ5fug43HxbWxDA0pJ8rkowuGG3n3Yh3 800Sm0/40zRBM50+pO/Mf7vWlrOtvhsH3uFObGlGxQslc9tF95nXW9488+A1lblQEl JCft+6ndKRDHIIE2eWwigdPUC/FwUHRauFimWdA0= From: gregkh@linuxfoundation.org To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Avri Altman , Jaegeuk Kim , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 5.10 133/290] scsi: ufs: WB is only available on LUN #0 to #7 Date: Mon, 15 Mar 2021 14:53:46 +0100 Message-Id: <20210315135546.397380613@linuxfoundation.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210315135541.921894249@linuxfoundation.org> References: <20210315135541.921894249@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Greg Kroah-Hartman From: Jaegeuk Kim [ Upstream commit a2fca52ee640a04112ed9d9a137c940ea6ad288e ] Kernel stack violation when getting unit_descriptor/wb_buf_alloc_units from rpmb LUN. The reason is that the unit descriptor length is different per LU. The length of Normal LU is 45 while the one of rpmb LU is 35. int ufshcd_read_desc_param(struct ufs_hba *hba, ...) { param_offset=41; param_size=4; buff_len=45; ... buff_len=35 by rpmb LU; if (is_kmalloc) { /* Make sure we don't copy more data than available */ if (param_offset + param_size > buff_len) param_size = buff_len - param_offset; --> param_size = 250; memcpy(param_read_buf, &desc_buf[param_offset], param_size); --> memcpy(param_read_buf, desc_buf+41, 250); [ 141.868974][ T9174] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: wb_buf_alloc_units_show+0x11c/0x11c } } Link: https://lore.kernel.org/r/20210111095927.1830311-1-jaegeuk@kernel.org Reviewed-by: Avri Altman Signed-off-by: Jaegeuk Kim Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/ufs/ufs-sysfs.c | 3 ++- drivers/scsi/ufs/ufs.h | 6 ++++-- drivers/scsi/ufs/ufshcd.c | 2 +- 3 files changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c index bdcd27faa054..34b424ad96a2 100644 --- a/drivers/scsi/ufs/ufs-sysfs.c +++ b/drivers/scsi/ufs/ufs-sysfs.c @@ -785,7 +785,8 @@ static ssize_t _pname##_show(struct device *dev, \ struct scsi_device *sdev = to_scsi_device(dev); \ struct ufs_hba *hba = shost_priv(sdev->host); \ u8 lun = ufshcd_scsi_to_upiu_lun(sdev->lun); \ - if (!ufs_is_valid_unit_desc_lun(&hba->dev_info, lun)) \ + if (!ufs_is_valid_unit_desc_lun(&hba->dev_info, lun, \ + _duname##_DESC_PARAM##_puname)) \ return -EINVAL; \ return ufs_sysfs_read_desc_param(hba, QUERY_DESC_IDN_##_duname, \ lun, _duname##_DESC_PARAM##_puname, buf, _size); \ diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h index f8ab16f30fdc..07ca39008b84 100644 --- a/drivers/scsi/ufs/ufs.h +++ b/drivers/scsi/ufs/ufs.h @@ -551,13 +551,15 @@ struct ufs_dev_info { * @return: true if the lun has a matching unit descriptor, false otherwise */ static inline bool ufs_is_valid_unit_desc_lun(struct ufs_dev_info *dev_info, - u8 lun) + u8 lun, u8 param_offset) { if (!dev_info || !dev_info->max_lu_supported) { pr_err("Max General LU supported by UFS isn't initialized\n"); return false; } - + /* WB is available only for the logical unit from 0 to 7 */ + if (param_offset == UNIT_DESC_PARAM_WB_BUF_ALLOC_UNITS) + return lun < UFS_UPIU_MAX_WB_LUN_ID; return lun == UFS_UPIU_RPMB_WLUN || (lun < dev_info->max_lu_supported); } diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 5a7cc2e42ffd..97d9d5d99adc 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -3378,7 +3378,7 @@ static inline int ufshcd_read_unit_desc_param(struct ufs_hba *hba, * Unit descriptors are only available for general purpose LUs (LUN id * from 0 to 7) and RPMB Well known LU. */ - if (!ufs_is_valid_unit_desc_lun(&hba->dev_info, lun)) + if (!ufs_is_valid_unit_desc_lun(&hba->dev_info, lun, param_offset)) return -EOPNOTSUPP; return ufshcd_read_desc_param(hba, QUERY_DESC_IDN_UNIT, lun,