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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 3427EC47253 for ; Fri, 1 May 2020 13:28:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 11097208D6 for ; Fri, 1 May 2020 13:28:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588339684; bh=VRbuhqsaG714iS2RnLYCQRuT3hk409iW9Hd2N+ezko4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=chjAq6bJHVTiYqyMALvs06asbn+8dJm4JWxRT9HR5u3yvMb5eCJu9cLJ3SWIqMGBC Kw46KUPZ3ERGm8ljlvDcghJa3PyZEPtEgucRDVrIgfkAbPGnwhKPlh9RCOAgl3ppZr NAhUiAjF4ALuYf+5HYOmBuNeMtBtMcWLAH2LzKf4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729562AbgEAN2D (ORCPT ); Fri, 1 May 2020 09:28:03 -0400 Received: from mail.kernel.org ([198.145.29.99]:50704 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729551AbgEAN2A (ORCPT ); Fri, 1 May 2020 09:28:00 -0400 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 4D9D62173E; Fri, 1 May 2020 13:27:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588339679; bh=VRbuhqsaG714iS2RnLYCQRuT3hk409iW9Hd2N+ezko4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pmlUaqbHpVCz+HKcxIRFx6tuEXvUTRF0kFirVBfj4GlOSxm3WFLdk2kas9Le55S7S /bQQAHg22NvOT4Tm6x89lO6fq9kRPDtlBV3cuxNsLK8GheWq3+6EXJ564ZeV1aQwJC uPhxfACZkISFwdNk/g1K+xeRveg0eVZK7DIujecQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, James Smart , Dick Kennedy , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 4.9 08/80] scsi: lpfc: Fix kasan slab-out-of-bounds error in lpfc_unreg_login Date: Fri, 1 May 2020 15:21:02 +0200 Message-Id: <20200501131515.573675210@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200501131513.810761598@linuxfoundation.org> References: <20200501131513.810761598@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 [ Upstream commit 38503943c89f0bafd9e3742f63f872301d44cbea ] The following kasan bug was called out: BUG: KASAN: slab-out-of-bounds in lpfc_unreg_login+0x7c/0xc0 [lpfc] Read of size 2 at addr ffff889fc7c50a22 by task lpfc_worker_3/6676 ... Call Trace: dump_stack+0x96/0xe0 ? lpfc_unreg_login+0x7c/0xc0 [lpfc] print_address_description.constprop.6+0x1b/0x220 ? lpfc_unreg_login+0x7c/0xc0 [lpfc] ? lpfc_unreg_login+0x7c/0xc0 [lpfc] __kasan_report.cold.9+0x37/0x7c ? lpfc_unreg_login+0x7c/0xc0 [lpfc] kasan_report+0xe/0x20 lpfc_unreg_login+0x7c/0xc0 [lpfc] lpfc_sli_def_mbox_cmpl+0x334/0x430 [lpfc] ... When processing the completion of a "Reg Rpi" login mailbox command in lpfc_sli_def_mbox_cmpl, a call may be made to lpfc_unreg_login. The vpi is extracted from the completing mailbox context and passed as an input for the next. However, the vpi stored in the mailbox command context is an absolute vpi, which for SLI4 represents both base + offset. When used with a non-zero base component, (function id > 0) this results in an out-of-range access beyond the allocated phba->vpi_ids array. Fix by subtracting the function's base value to get an accurate vpi number. Link: https://lore.kernel.org/r/20200322181304.37655-2-jsmart2021@gmail.com Signed-off-by: James Smart Signed-off-by: Dick Kennedy Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/lpfc/lpfc_sli.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index cbe808e83f477..1c34dc3355498 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -2210,6 +2210,8 @@ lpfc_sli_def_mbox_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb) !pmb->u.mb.mbxStatus) { rpi = pmb->u.mb.un.varWords[0]; vpi = pmb->u.mb.un.varRegLogin.vpi; + if (phba->sli_rev == LPFC_SLI_REV4) + vpi -= phba->sli4_hba.max_cfg_param.vpi_base; lpfc_unreg_login(phba, vpi, rpi, pmb); pmb->vport = vport; pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl; -- 2.20.1