From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 15A74A3201 for ; Mon, 21 Oct 2019 11:09:36 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id E77C44C8E; Mon, 21 Oct 2019 11:09:35 +0200 (CEST) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by dpdk.org (Postfix) with ESMTP id 5FDFC23D; Mon, 21 Oct 2019 11:09:34 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Oct 2019 02:09:33 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,323,1566889200"; d="scan'208";a="209288245" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.10]) ([10.237.221.10]) by orsmga002.jf.intel.com with ESMTP; 21 Oct 2019 02:09:31 -0700 To: "Kumar, Ravi1" , Pallantla Poornima , "dev@dpdk.org" Cc: "reshma.pattan@intel.com" , "jananeex.m.parthasarathy@intel.com" , "stable@dpdk.org" References: <1568890907-10123-1-git-send-email-pallantlax.poornima@intel.com> <1c2dc5ac-c0f6-64e9-3040-704b896a212d@intel.com> From: Ferruh Yigit Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH] net/axgbe: fix double unlock coverity issue X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 10/21/2019 9:20 AM, Kumar, Ravi1 wrote: >> On 10/9/2019 9:41 AM, Ferruh Yigit wrote: >>> On 9/19/2019 12:01 PM, Pallantla Poornima wrote: >>>> One issue caught by Coverity 340835 >>>> *unlock: axgbe_phy_set_mode unlocks pdata->phy_mutex >>>> *double_unlock: axgbe_phy_sfp_detect unlocks pdata->phy_mutex while >>>> it is unlocked. >>>> >>>> In axgbe_phy_sfp_detect()/axgbe_phy_set_redrv_mode(), >>>> axgbe_phy_get_comm_ownership() and axgbe_phy_put_comm_ownership() are >>>> invoked subsequently. >>>> >>>> Currently in axgbe_phy_get_comm_ownership(), during one of the case >>>> 'phy_data->comm_owned' is not protected and before returning 0, lock >>>> is not called and unlock is called in axgbe_phy_put_comm_ownership() >>>> directly which is incorrect. >>>> >>>> Ideally, the variable 'phy_data->comm_owned' needs to be protected. >>>> During success scenario, lock is called in >>>> axgbe_phy_get_comm_ownership() followed by unlock in axgbe_phy_put_comm_ownership(). >>>> In failure case, unlock is invoked in axgbe_phy_get_comm_ownership() >>>> itself appropriately. >>>> >>>> The fix is to protect 'phy_data->comm_owned' in the identified case >>>> ensuring locks/unlocks properly exist. >>>> >>>> Coverity issue: 340835 >>>> Fixes: a5c7273771 ("net/axgbe: add phy programming APIs") >>>> Cc: stable@dpdk.org >>>> >>>> Signed-off-by: Pallantla Poornima >>> >>> lgtm, 'axgbe_phy_put_comm_ownership()' expects 'axgbe_phy_get_comm_ownership()' >>> gets the lock. Thanks for fixing the coverity issue. >>> >>> But still, Ravi can you please review/test the patch? >>> >> >> If there is no objection the patch will be merged soon. >> > Looks good to me. Ok to merge. (Converting to explicit Ack) Acked-by: Ravi Kumar Applied to dpdk-next-net/master, thanks.