From mboxrd@z Thu Jan 1 00:00:00 1970 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 55F23C43603 for ; Mon, 16 Dec 2019 18:16:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 203F42082E for ; Mon, 16 Dec 2019 18:16:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576520171; bh=Ds3sX30r1NoxeJY4lwGPNSczYWtJPa3hIhgE/xYjZ74=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=yQhX0csgZVpAs95cR31Uq4I9Lk0HZ6WFMq+Vko5Dts9FOwqVg7/fjs0wQcB7BK3Df xal3yoU+B4BZpL8GllXcX5h2onwv7o5IR7tTlOm6CGkH0rQD/v88y+T6n+hjSknqFU qK11fxzcTTthvgNb2HcRYEvphq8SVWDiQVbpxegI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731311AbfLPSQK (ORCPT ); Mon, 16 Dec 2019 13:16:10 -0500 Received: from mail.kernel.org ([198.145.29.99]:38150 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731186AbfLPSQH (ORCPT ); Mon, 16 Dec 2019 13:16:07 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 25CB02082E; Mon, 16 Dec 2019 18:16:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576520166; bh=Ds3sX30r1NoxeJY4lwGPNSczYWtJPa3hIhgE/xYjZ74=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g0cmr8dBm6en0kfsiX9FHHZbxk/wrbE7r5l/GhclYDAKnQQFgeW0SfXIF3q3CpDLD SdgszUFjLFzcUrcCRambat9tzPAqaEQHmb08IFQTJuryI17fBN8yddcdPK9aY25Yo2 VPElSD7e2W0i6gUDEBceKkV9PJzrcvSpgYEeqDLw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dick Kennedy , James Smart , "Martin K. Petersen" Subject: [PATCH 5.4 005/177] scsi: lpfc: Fix bad ndlp ptr in xri aborted handling Date: Mon, 16 Dec 2019 18:47:41 +0100 Message-Id: <20191216174812.316462243@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191216174811.158424118@linuxfoundation.org> References: <20191216174811.158424118@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: James Smart commit 324e1c402069e8d277d2a2b18ce40bde1265b96a upstream. In cases where I/O may be aborted, such as driver unload or link bounces, the system will crash based on a bad ndlp pointer. Example: RIP: 0010:lpfc_sli4_abts_err_handler+0x15/0x140 [lpfc] ... lpfc_sli4_io_xri_aborted+0x20d/0x270 [lpfc] lpfc_sli4_sp_handle_abort_xri_wcqe.isra.54+0x84/0x170 [lpfc] lpfc_sli4_fp_handle_cqe+0xc2/0x480 [lpfc] __lpfc_sli4_process_cq+0xc6/0x230 [lpfc] __lpfc_sli4_hba_process_cq+0x29/0xc0 [lpfc] process_one_work+0x14c/0x390 Crash was caused by a bad ndlp address passed to I/O indicated by the XRI aborted CQE. The address was not NULL so the routine deferenced the ndlp ptr. The bad ndlp also caused the lpfc_sli4_io_xri_aborted to call an erroneous io handler. Root cause for the bad ndlp was an lpfc_ncmd that was aborted, put on the abort_io list, completed, taken off the abort_io list, sent to lpfc_release_nvme_buf where it was put back on the abort_io list because the lpfc_ncmd->flags setting LPFC_SBUF_XBUSY was not cleared on the final completion. Rework the exchange busy handling to ensure the flags are properly set for both scsi and nvme. Fixes: c490850a0947 ("scsi: lpfc: Adapt partitioned XRI lists to efficient sharing") Cc: # v5.1+ Link: https://lore.kernel.org/r/20191018211832.7917-6-jsmart2021@gmail.com Signed-off-by: Dick Kennedy Signed-off-by: James Smart Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/lpfc/lpfc_scsi.c | 11 +++++++---- drivers/scsi/lpfc/lpfc_sli.c | 5 ++++- drivers/scsi/lpfc/lpfc_sli.h | 3 +-- 3 files changed, 12 insertions(+), 7 deletions(-) --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -526,7 +526,7 @@ lpfc_sli4_io_xri_aborted(struct lpfc_hba &qp->lpfc_abts_io_buf_list, list) { if (psb->cur_iocbq.sli4_xritag == xri) { list_del_init(&psb->list); - psb->exch_busy = 0; + psb->flags &= ~LPFC_SBUF_XBUSY; psb->status = IOSTAT_SUCCESS; if (psb->cur_iocbq.iocb_flag == LPFC_IO_NVME) { qp->abts_nvme_io_bufs--; @@ -566,7 +566,7 @@ lpfc_sli4_io_xri_aborted(struct lpfc_hba if (iocbq->sli4_xritag != xri) continue; psb = container_of(iocbq, struct lpfc_io_buf, cur_iocbq); - psb->exch_busy = 0; + psb->flags &= ~LPFC_SBUF_XBUSY; spin_unlock_irqrestore(&phba->hbalock, iflag); if (!list_empty(&pring->txq)) lpfc_worker_wake_up(phba); @@ -786,7 +786,7 @@ lpfc_release_scsi_buf_s4(struct lpfc_hba psb->prot_seg_cnt = 0; qp = psb->hdwq; - if (psb->exch_busy) { + if (psb->flags & LPFC_SBUF_XBUSY) { spin_lock_irqsave(&qp->abts_io_buf_list_lock, iflag); psb->pCmd = NULL; list_add_tail(&psb->list, &qp->lpfc_abts_io_buf_list); @@ -3835,7 +3835,10 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK); lpfc_cmd->status = pIocbOut->iocb.ulpStatus; /* pick up SLI4 exhange busy status from HBA */ - lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY; + if (pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY) + lpfc_cmd->flags |= LPFC_SBUF_XBUSY; + else + lpfc_cmd->flags &= ~LPFC_SBUF_XBUSY; #ifdef CONFIG_SCSI_LPFC_DEBUG_FS if (lpfc_cmd->prot_data_type) { --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -11736,7 +11736,10 @@ lpfc_sli_wake_iocb_wait(struct lpfc_hba !(cmdiocbq->iocb_flag & LPFC_IO_LIBDFC)) { lpfc_cmd = container_of(cmdiocbq, struct lpfc_io_buf, cur_iocbq); - lpfc_cmd->exch_busy = rspiocbq->iocb_flag & LPFC_EXCHANGE_BUSY; + if (rspiocbq && (rspiocbq->iocb_flag & LPFC_EXCHANGE_BUSY)) + lpfc_cmd->flags |= LPFC_SBUF_XBUSY; + else + lpfc_cmd->flags &= ~LPFC_SBUF_XBUSY; } pdone_q = cmdiocbq->context_un.wait_queue; --- a/drivers/scsi/lpfc/lpfc_sli.h +++ b/drivers/scsi/lpfc/lpfc_sli.h @@ -384,14 +384,13 @@ struct lpfc_io_buf { struct lpfc_nodelist *ndlp; uint32_t timeout; - uint16_t flags; /* TBD convert exch_busy to flags */ + uint16_t flags; #define LPFC_SBUF_XBUSY 0x1 /* SLI4 hba reported XB on WCQE cmpl */ #define LPFC_SBUF_BUMP_QDEPTH 0x2 /* bumped queue depth counter */ /* External DIF device IO conversions */ #define LPFC_SBUF_NORMAL_DIF 0x4 /* normal mode to insert/strip */ #define LPFC_SBUF_PASS_DIF 0x8 /* insert/strip mode to passthru */ #define LPFC_SBUF_NOT_POSTED 0x10 /* SGL failed post to FW. */ - uint16_t exch_busy; /* SLI4 hba reported XB on complete WCQE */ uint16_t status; /* From IOCB Word 7- ulpStatus */ uint32_t result; /* From IOCB Word 4. */