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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,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 0BA3FC282C5 for ; Thu, 24 Jan 2019 19:35:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CFC2421905 for ; Thu, 24 Jan 2019 19:35:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548358515; bh=SOdfPhYJrCKR9xkGXpIpjF3UsoA6sBhg4e5Wzwg2pR0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Sd2r9/MrsNcAqRA4nNxaTpux82KiVLB4kn86sobkQuNTFWGZxw6Cyp4dsGAu5x5XL MID8eArdeLelMQkmHlRBQnkhNtagcos42vCPm31g9rEThxhdM7qWeBpkXDc8nmcek9 bsGb94rH1MBv3tk98NO/ePndQ8B6vjMF53NKgsL8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730956AbfAXTfO (ORCPT ); Thu, 24 Jan 2019 14:35:14 -0500 Received: from mail.kernel.org ([198.145.29.99]:35080 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731935AbfAXTfN (ORCPT ); Thu, 24 Jan 2019 14:35:13 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 53EC5218D4; Thu, 24 Jan 2019 19:35:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548358512; bh=SOdfPhYJrCKR9xkGXpIpjF3UsoA6sBhg4e5Wzwg2pR0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Gz8aw/0ANMu5QBEd6n0OoscGCgl9wSRrJp6ReuXD4gTFziscokYySfOjTcLnUuJog ckCe4UoMwEv9B1LPw2q8Ju+uVBy4403x19icQkX7XS8oYUwmNTKbNxEY5FOpxQ7EvE H2LIejIOM7FQKXMbsNLafXhebMcqIhpYswG5QshU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Manish Rangankar , Lee Duncan , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 4.19 035/106] scsi: qedi: Check for session online before getting iSCSI TLV data. Date: Thu, 24 Jan 2019 20:19:52 +0100 Message-Id: <20190124190208.620124426@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190124190206.342411005@linuxfoundation.org> References: <20190124190206.342411005@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit d5632b11f0a17efa6356311e535ae135d178438d ] The kernel panic was observed after switch side perturbation, BUG: unable to handle kernel NULL pointer dereference at (null) IP: [] strcmp+0x20/0x40 PGD 0 Oops: 0000 [#1] SMP CPU: 8 PID: 647 Comm: kworker/8:1 Tainted: G W OE ------------ 3.10.0-693.el7.x86_64 #1 Hardware name: HPE ProLiant DL380 Gen10/ProLiant DL380 Gen10, BIOS U30 06/20/2018 Workqueue: slowpath-13:00. qed_slowpath_task [qed] task: ffff880429eb8fd0 ti: ffff880429190000 task.ti: ffff880429190000 RIP: 0010:[] [] strcmp+0x20/0x40 RSP: 0018:ffff880429193c68 EFLAGS: 00010202 RAX: 000000000000000a RBX: 0000000000000002 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff88042bda7a41 RBP: ffff880429193c68 R08: 000000000000ffff R09: 000000000000ffff R10: 0000000000000007 R11: ffff88042b3af338 R12: ffff880420b007a0 R13: ffff88081aa56af8 R14: 0000000000000001 R15: ffff88081aa50410 FS: 0000000000000000(0000) GS:ffff88042fe00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000019f2000 CR4: 00000000003407e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffff880429193d20 ffffffffc02a0c90 ffffc90004b32000 ffff8803fd3ec600 ffff88042bda7800 ffff88042bda7a00 ffff88042bda7840 ffff88042bda7a40 0000000129193d10 2e3836312e323931 ff000a342e363232 ffffffffc01ad99d Call Trace: [] qedi_get_protocol_tlv_data+0x270/0x470 [qedi] [] ? qed_mfw_process_tlv_req+0x24d/0xbf0 [qed] [] qed_mfw_fill_tlv_data+0x5e/0xd0 [qed] [] qed_mfw_process_tlv_req+0x269/0xbf0 [qed] Fix kernel NULL pointer deref by checking for session is online before getting iSCSI TLV data. Signed-off-by: Manish Rangankar Reviewed-by: Lee Duncan Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/qedi/qedi_main.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/scsi/qedi/qedi_main.c b/drivers/scsi/qedi/qedi_main.c index e5bd035ebad0..4de740da547b 100644 --- a/drivers/scsi/qedi/qedi_main.c +++ b/drivers/scsi/qedi/qedi_main.c @@ -952,6 +952,9 @@ static int qedi_find_boot_info(struct qedi_ctx *qedi, cls_sess = iscsi_conn_to_session(cls_conn); sess = cls_sess->dd_data; + if (!iscsi_is_session_online(cls_sess)) + continue; + if (pri_ctrl_flags) { if (!strcmp(pri_tgt->iscsi_name, sess->targetname) && !strcmp(pri_tgt->ip_addr, ep_ip_addr)) { -- 2.19.1