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=-8.9 required=3.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,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 E23C0C64EB1 for ; Thu, 6 Dec 2018 15:54:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A80FF2151B for ; Thu, 6 Dec 2018 15:54:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A80FF2151B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gmx.us Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726232AbeLFPyw (ORCPT ); Thu, 6 Dec 2018 10:54:52 -0500 Received: from mout.gmx.net ([212.227.17.22]:45417 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725871AbeLFPyw (ORCPT ); Thu, 6 Dec 2018 10:54:52 -0500 Received: from ovpn-121-90.rdu2.redhat.com ([71.184.117.43]) by mail.gmx.com (mrgmx102 [212.227.17.174]) with ESMTPSA (Nemesis) id 0MATlG-1gc7mH1uUE-00BdkE; Thu, 06 Dec 2018 16:54:31 +0100 From: Qian Cai To: kashyap.desai@broadcom.com, sumit.saxena@broadcom.com, shivasharan.srikanteshwara@broadcom.com Cc: jejb@linux.vnet.ibm.com, martin.petersen@oracle.com, thenzl@redhat.com, hch@lst.de, megaraidlinux.pdl@broadcom.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Qian Cai Subject: [PATCH] megaraid: fix a out-of-bound array access Date: Thu, 6 Dec 2018 10:53:51 -0500 Message-Id: <20181206155351.36099-1-cai@gmx.us> X-Mailer: git-send-email 2.17.2 (Apple Git-113) In-Reply-To: References: X-Provags-ID: V03:K1:tm8mLoXcpH6mLrFe1z1+RD0LqfTph8zeq6YMKanVxUXFlT6hwbe jeueZ6rb4ERD6by0+IJX6pEo0OF8ylCLgHA4MSBaqZFYvUfiiUe/qrZRJs8b9haXivAqPVk EFWwF507lRq809WTcHOVWaKN+Xhmx7UcIFRA4hstNKcJ+jcWtb+A9lHn2lcTHFC78OwvTVF Wua/6gyCXGyV0OzN4YsTg== X-UI-Out-Filterresults: notjunk:1;V03:K0:zAUwTYy3VFk=:oCIZGyqgUp31WLGxlWZSQk 6JKVI3U0v952qsy1ipq1wuDlADDIsQrGyTg/r7H3bHKMq0VnBlWOAmEiRsaScYKI7Z5kVgk1K Cau1hV5eVWrRmigr2uXuGdCWF0aRW6yOsJTkTxCw/doZWnoXR1YYdE7fGiBur5vymV+0ekLox 6CAjAjFeWuvvHXBTlgB+6JyV+uBQ34UPf/+XvNkrE6//3O3HqzErTK/z3+ApRnftK+aibLLON Qty2T+uCJdSsG9XqZlgODlubIP7wGPxndug4GgEpkLgQqrOCS61Y0/LS+S05JflpkiXUyK0zq 2Zs8kBnONvHA+N5RkszUccODvz4ml2CuNK9sXKs5jbqdrZ8AmlgXNrNV6IVY+OdSVkrra1Ymh w2RluUZPUpRNCdYe3VtZTHPz/o4xOacbS/Q1B0O20e50Hf54IAeWD2/UJXNjzohIEBNdgymze AYR4jdT9JxYE4g5LrOGH6ie0DkQFSiRLndmhscPFU0yY8BF28Q4tXdlKdgFozIWY7g8HbAMvD mpPtJMeS+/avJ6Bj3zKMtSxjPoVM65V2QaMSDATipKMUFCZ2BHI0DDNzQ2Ykm2c64cC55gmqQ q4x7NpZdYZlyNoWtInpjVS0frQJmXHlc4Xq3GbbA6bGpJG7aSnCAXbVtFeh2mpFo/m7dWAvgp s9jQ4U7Nv68iPF1KPUBr3z+D54FoFm9lBg/Sb1mLrogg+ZGALgUQpYeYm26E5beBG1Po5RjVH BaDuFf+juBaJM9UOA26IxGBXbJuUEgVS5ckinUGIvrPnceoWUgU9kGM1Rt2UUOfHGfAn56D32 UxHeTAtWtHg/gxElt2GiXMsatbw6gQN4klLEalFdsmIO0kRNgE8pXTATjcwbSWY9Gd5iz1e3C vE7w5iNKbrroHAyBgm1A45w2wy842lfEBYTvzRLiI= Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org UBSAN reported those with MegaRAID SAS-3 3108, [ 77.467308] UBSAN: Undefined behaviour in drivers/scsi/megaraid/megaraid_sas_fp.c:117:32 [ 77.475402] index 255 is out of range for type 'MR_LD_SPAN_MAP [1]' [ 77.481677] CPU: 16 PID: 333 Comm: kworker/16:1 Not tainted 4.20.0-rc5+ #1 [ 77.488556] Hardware name: Huawei TaiShan 2280 /BC11SPCD, BIOS 1.50 06/01/2018 [ 77.495791] Workqueue: events work_for_cpu_fn [ 77.500154] Call trace: [ 77.502610] dump_backtrace+0x0/0x2c8 [ 77.506279] show_stack+0x24/0x30 [ 77.509604] dump_stack+0x118/0x19c [ 77.513098] ubsan_epilogue+0x14/0x60 [ 77.516765] __ubsan_handle_out_of_bounds+0xfc/0x13c [ 77.521767] mr_update_load_balance_params+0x150/0x158 [megaraid_sas] [ 77.528230] MR_ValidateMapInfo+0x2cc/0x10d0 [megaraid_sas] [ 77.533825] megasas_get_map_info+0x244/0x2f0 [megaraid_sas] [ 77.539505] megasas_init_adapter_fusion+0x9b0/0xf48 [megaraid_sas] [ 77.545794] megasas_init_fw+0x1ab4/0x3518 [megaraid_sas] [ 77.551212] megasas_probe_one+0x2c4/0xbe0 [megaraid_sas] [ 77.556614] local_pci_probe+0x7c/0xf0 [ 77.560365] work_for_cpu_fn+0x34/0x50 [ 77.564118] process_one_work+0x61c/0xf08 [ 77.568129] worker_thread+0x534/0xa70 [ 77.571882] kthread+0x1c8/0x1d0 [ 77.575114] ret_from_fork+0x10/0x1c [ 89.240332] UBSAN: Undefined behaviour in drivers/scsi/megaraid/megaraid_sas_fp.c:117:32 [ 89.248426] index 255 is out of range for type 'MR_LD_SPAN_MAP [1]' [ 89.254700] CPU: 16 PID: 95 Comm: kworker/u130:0 Not tainted 4.20.0-rc5+ #1 [ 89.261665] Hardware name: Huawei TaiShan 2280 /BC11SPCD, BIOS 1.50 06/01/2018 [ 89.268903] Workqueue: events_unbound async_run_entry_fn [ 89.274222] Call trace: [ 89.276680] dump_backtrace+0x0/0x2c8 [ 89.280348] show_stack+0x24/0x30 [ 89.283671] dump_stack+0x118/0x19c [ 89.287167] ubsan_epilogue+0x14/0x60 [ 89.290835] __ubsan_handle_out_of_bounds+0xfc/0x13c [ 89.295828] MR_LdRaidGet+0x50/0x58 [megaraid_sas] [ 89.300638] megasas_build_io_fusion+0xbb8/0xd90 [megaraid_sas] [ 89.306576] megasas_build_and_issue_cmd_fusion+0x138/0x460 [megaraid_sas] [ 89.313468] megasas_queue_command+0x398/0x3d0 [megaraid_sas] [ 89.319222] scsi_dispatch_cmd+0x1dc/0x8a8 [ 89.323321] scsi_request_fn+0x8e8/0xdd0 [ 89.327249] __blk_run_queue+0xc4/0x158 [ 89.331090] blk_execute_rq_nowait+0xf4/0x158 [ 89.335449] blk_execute_rq+0xdc/0x158 [ 89.339202] __scsi_execute+0x130/0x258 [ 89.343041] scsi_probe_and_add_lun+0x2fc/0x1488 [ 89.347661] __scsi_scan_target+0x1cc/0x8c8 [ 89.351848] scsi_scan_channel.part.3+0x8c/0xc0 [ 89.356382] scsi_scan_host_selected+0x130/0x1f0 [ 89.361002] do_scsi_scan_host+0xd8/0xf0 [ 89.364927] do_scan_async+0x9c/0x320 [ 89.368594] async_run_entry_fn+0x138/0x420 [ 89.372780] process_one_work+0x61c/0xf08 [ 89.376793] worker_thread+0x13c/0xa70 [ 89.380546] kthread+0x1c8/0x1d0 [ 89.383778] ret_from_fork+0x10/0x1c This is because when populating Driver Map using firmware raid map, all non-existing VDs set their ldTgtIdToLd to 0xff, so it can be skipped later. However, there are a few places that failed to skip those non-existing VDs due to off-by-one errors. Then, those 0xff leaked into MR_LdRaidGet(0xff, map) and triggered the out-of-bound access. Fixes: 51087a8617fe (megaraid_sas : Extended VD support) Signed-off-by: Qian Cai --- drivers/scsi/megaraid/megaraid_sas_fp.c | 2 +- drivers/scsi/megaraid/megaraid_sas_fusion.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas_fp.c b/drivers/scsi/megaraid/megaraid_sas_fp.c index 59ecbb3b53b5..a33628550425 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fp.c +++ b/drivers/scsi/megaraid/megaraid_sas_fp.c @@ -1266,7 +1266,7 @@ void mr_update_load_balance_params(struct MR_DRV_RAID_MAP_ALL *drv_map, for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES_EXT; ldCount++) { ld = MR_TargetIdToLdGet(ldCount, drv_map); - if (ld >= MAX_LOGICAL_DRIVES_EXT) { + if (ld >= MAX_LOGICAL_DRIVES_EXT - 1) { lbInfo[ldCount].loadBalanceFlag = 0; continue; } diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index f74b5ea24f0f..8e0ac206dabc 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -2829,7 +2829,7 @@ static void megasas_build_ld_nonrw_fusion(struct megasas_instance *instance, pRAID_Context->reg_lock_length = 0; if (fusion->fast_path_io && ( - device_id < instance->fw_supported_vd_count)) { + device_id < instance->fw_supported_vd_count - 1)) { ld = MR_TargetIdToLdGet(device_id, local_map_ptr); if (ld >= instance->fw_supported_vd_count) -- 2.17.2 (Apple Git-113)