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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2E2EAC433EF for ; Tue, 9 Nov 2021 22:35:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 12E6260F36 for ; Tue, 9 Nov 2021 22:35:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345546AbhKIWiM (ORCPT ); Tue, 9 Nov 2021 17:38:12 -0500 Received: from mail.kernel.org ([198.145.29.99]:56332 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345056AbhKIWf6 (ORCPT ); Tue, 9 Nov 2021 17:35:58 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id AA1F361AE0; Tue, 9 Nov 2021 22:22:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1636496552; bh=+rDN7N/jbkDnn0hQ8X5WZx5qfX//9WsZuSxaPhm+Hro=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZJO0QSNMGPJ9Kuq253juMU/+k9cuV0Lmq8ZRmqiDAoASRCMZkFx/S+irzwzNDlyt/ xkTmEAQ/dl8Xu3DDGha5ZLrantRseiwquz2yNO4IXHdPLALRNmkKYGQMVjIm4BoD6w Do885neJP4pW6XXGHDUoOD5x1WmMg9e9lJxBdQxVW1OzeYKEAUdGXvRnTRudfT5T44 fPNITOzHOxAzaYnWl3FUzEKQV7cnffF+hloWIETePixQlGUknXJ3WSj9QUDRzpTOqt wkEzv2LNU9CsXevnjUisVQZF9WG/vjWSefPWouXPGSJ1KdkKValRwcFILLuqLsbhIe 2cMrcWj7htWxg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: James Smart , Justin Tee , "Martin K . Petersen" , Sasha Levin , james.smart@avagotech.com, dick.kennedy@avagotech.com, JBottomley@odin.com, linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 04/30] scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq() Date: Tue, 9 Nov 2021 17:21:58 -0500 Message-Id: <20211109222224.1235388-4-sashal@kernel.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211109222224.1235388-1-sashal@kernel.org> References: <20211109222224.1235388-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: James Smart [ Upstream commit 99154581b05c8fb22607afb7c3d66c1bace6aa5d ] When parsing the txq list in lpfc_drain_txq(), the driver attempts to pass the requests to the adapter. If such an attempt fails, a local "fail_msg" string is set and a log message output. The job is then added to a completions list for cancellation. Processing of any further jobs from the txq list continues, but since "fail_msg" remains set, jobs are added to the completions list regardless of whether a wqe was passed to the adapter. If successfully added to txcmplq, jobs are added to both lists resulting in list corruption. Fix by clearing the fail_msg string after adding a job to the completions list. This stops the subsequent jobs from being added to the completions list unless they had an appropriate failure. Link: https://lore.kernel.org/r/20210910233159.115896-2-jsmart2021@gmail.com Co-developed-by: Justin Tee Signed-off-by: Justin Tee Signed-off-by: James Smart Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/lpfc/lpfc_sli.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index 4a7ceaa34341c..51bab0979527b 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -19692,6 +19692,7 @@ lpfc_drain_txq(struct lpfc_hba *phba) fail_msg, piocbq->iotag, piocbq->sli4_xritag); list_add_tail(&piocbq->list, &completions); + fail_msg = NULL; } spin_unlock_irqrestore(&pring->ring_lock, iflags); } -- 2.33.0