From patchwork Thu Sep 28 07:35:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wenchao Hao X-Patchwork-Id: 727991 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 561E0CE7B0B for ; Thu, 28 Sep 2023 07:36:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230254AbjI1HgZ (ORCPT ); Thu, 28 Sep 2023 03:36:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38502 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229894AbjI1HgW (ORCPT ); Thu, 28 Sep 2023 03:36:22 -0400 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 134CA97; Thu, 28 Sep 2023 00:36:18 -0700 (PDT) Received: from kwepemm000012.china.huawei.com (unknown [172.30.72.57]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4Rx4tx5qBgzNntS; Thu, 28 Sep 2023 15:32:25 +0800 (CST) Received: from build.huawei.com (10.175.101.6) by kwepemm000012.china.huawei.com (7.193.23.142) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.31; Thu, 28 Sep 2023 15:36:15 +0800 From: Wenchao Hao To: "James E . J . Bottomley" , "Martin K . Petersen" , CC: , , Wenchao Hao Subject: [PATCH v2 3/4] scsi: scsi_error: Fix device reset is not triggered Date: Thu, 28 Sep 2023 15:35:42 +0800 Message-ID: <20230928073543.3496394-4-haowenchao2@huawei.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20230928073543.3496394-1-haowenchao2@huawei.com> References: <20230928073543.3496394-1-haowenchao2@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.101.6] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemm000012.china.huawei.com (7.193.23.142) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org shost_for_each_device() would skip devices which is in progress of removing, so scsi_try_bus_device_reset() for these devices would be skipped in scsi_eh_bus_device_reset() with following order: T1: T2:scsi_error_handle __scsi_remove_device scsi_device_set_state(sdev, SDEV_DEL) // would skip device with SDEV_DEL state shost_for_each_device() scsi_try_bus_device_reset flush all commands ... releasing and free scsi_device Some drivers like smartpqi only implement eh_device_reset_handler, if device reset is skipped, the commands which had been sent to firmware or devices hardware are not cleared. The error handle would flush all these commands in scsi_unjam_host(). When the commands are finished by hardware, use after free issue is triggered. Fix this issue by using shost_for_each_device_include_deleted() to iterate devices in scsi_eh_bus_device_reset(). Signed-off-by: Wenchao Hao --- drivers/scsi/scsi_error.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 2550f8cd182a..57e3cc556549 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -1568,7 +1568,7 @@ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost, struct scsi_device *sdev; enum scsi_disposition rtn; - shost_for_each_device(sdev, shost) { + shost_for_each_device_include_deleted(sdev, shost) { if (scsi_host_eh_past_deadline(shost)) { SCSI_LOG_ERROR_RECOVERY(3, sdev_printk(KERN_INFO, sdev,