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 C8E8BA31F3 for ; Fri, 18 Oct 2019 18:53:30 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id B5DC01C0DD; Fri, 18 Oct 2019 18:53:30 +0200 (CEST) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id E666F1C0B4; Fri, 18 Oct 2019 18:53:26 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 18 Oct 2019 09:53:26 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,312,1566889200"; d="scan'208";a="348136425" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.10]) ([10.237.221.10]) by orsmga004.jf.intel.com with ESMTP; 18 Oct 2019 09:53:24 -0700 From: Ferruh Yigit To: Pallantla Poornima , dev@dpdk.org, ravi1.kumar@amd.com 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> Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH] net/axgbe: fix double unlock coverity issue X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org Sender: "stable" 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.