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,DKIM_VALID_AU,INCLUDES_PATCH,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 1D02DC433DF for ; Thu, 18 Jun 2020 01:53:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EEB4D2222A for ; Thu, 18 Jun 2020 01:53:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592445222; bh=UDMO8yPxo/ymHjbdYyC+RM4xaVrptlMQ6yvJ7+uYWVk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ffUgyBLrxia3k+qWGIGG2LYBQvdRkRsvl9IKr63d95mnpRg8yI63xu8Yu6jRUODXT 6/xKgJvr4DWfR6YYvP8/HpxT+p7FRnL56hkOei/y7qmPR+DCOk+oBSm/L/SXLkyelX trRiusgeCI9jPK7vpGNsEoZmZS0UVMaMbLxiDC44= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733213AbgFRBxl (ORCPT ); Wed, 17 Jun 2020 21:53:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:33644 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731626AbgFRB0P (ORCPT ); Wed, 17 Jun 2020 21:26:15 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2DC8D20B1F; Thu, 18 Jun 2020 01:26:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592443575; bh=UDMO8yPxo/ymHjbdYyC+RM4xaVrptlMQ6yvJ7+uYWVk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=A6oEB7fF+aP5fEsvrtGBqBL3bufxVGqi07Isfz9iFjtYbETjV4f/mXqoRpyXuK82e pQNtUpkgn7anrP+woHcVjNW2VVkH90j5T5OQ4muGbQy1QgvJMloWSeFMiCaG+nmoSI uspInp6yokDUDSgDkMnjDucrt4cpx2qVga3pW+fc= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dan Carpenter , Manish Rangankar , "Martin K . Petersen" , Sasha Levin , linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 011/108] scsi: qedi: Check for buffer overflow in qedi_set_path() Date: Wed, 17 Jun 2020 21:24:23 -0400 Message-Id: <20200618012600.608744-11-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200618012600.608744-1-sashal@kernel.org> References: <20200618012600.608744-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dan Carpenter [ Upstream commit 4a4c0cfb4be74e216dd4446b254594707455bfc6 ] Smatch complains that the "path_data->handle" variable is user controlled. It comes from iscsi_set_path() so that seems possible. It's harmless to add a limit check. The qedi->ep_tbl[] array has qedi->max_active_conns elements (which is always ISCSI_MAX_SESS_PER_HBA (4096) elements). The array is allocated in the qedi_cm_alloc_mem() function. Link: https://lore.kernel.org/r/20200428131939.GA696531@mwanda Fixes: ace7f46ba5fd ("scsi: qedi: Add QLogic FastLinQ offload iSCSI driver framework.") Acked-by: Manish Rangankar Signed-off-by: Dan Carpenter Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/qedi/qedi_iscsi.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/scsi/qedi/qedi_iscsi.c b/drivers/scsi/qedi/qedi_iscsi.c index 94f3829b1974..1effac1111d5 100644 --- a/drivers/scsi/qedi/qedi_iscsi.c +++ b/drivers/scsi/qedi/qedi_iscsi.c @@ -1224,6 +1224,10 @@ static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data) } iscsi_cid = (u32)path_data->handle; + if (iscsi_cid >= qedi->max_active_conns) { + ret = -EINVAL; + goto set_path_exit; + } qedi_ep = qedi->ep_tbl[iscsi_cid]; QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep); -- 2.25.1