From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by dpdk.org (Postfix) with ESMTP id DED121B227; Mon, 14 Jan 2019 14:29:42 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 14 Jan 2019 05:29:41 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,477,1539673200"; d="scan'208";a="114541683" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.22]) ([10.237.221.22]) by fmsmga007.fm.intel.com with ESMTP; 14 Jan 2019 05:29:39 -0800 To: Chaitanya Babu Talluri , dev@dpdk.org, alejandro.lucero@netronome.com Cc: reshma.pattan@intel.com, rmody@marvell.com, shshaikh@marvell.com, beilei.xing@intel.com, qi.z.zhang@intel.com, pablo.de.lara.guarch@intel.com, declan.doherty@intel.com, stable@dpdk.org References: <1547445875-24601-1-git-send-email-tallurix.chaitanya.babu@intel.com> From: Ferruh Yigit Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <1547445875-24601-1-git-send-email-tallurix.chaitanya.babu@intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Subject: Re: [dpdk-dev] [PATCH] drivers: fix to replace strcat with strncat 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: , X-List-Received-Date: Mon, 14 Jan 2019 13:29:43 -0000 On 1/14/2019 6:04 AM, Chaitanya Babu Talluri wrote: > Strcat does not check the destination length and there might be > chances of string overflow so insted of strcat, strncat is used. > > Fixes: 540a211084 ("bnx2x: driver core") > Fixes: e163c18a15 ("net/i40e: update ptype and pctype info") > Fixes: ef28aa96e5 ("net/nfp: support multiprocess") > Fixes: 6f4eec2565 ("test/crypto: enhance scheduler unit tests") > Cc: stable@dpdk.org > > Signed-off-by: Chaitanya Babu Talluri <...> > @@ -685,11 +687,11 @@ nfp_acquire_secondary_process_lock(struct nfp_pcie_user *desc) > * driver is used because that implies root user. > */ > home_path = getenv("HOME"); > - lockfile = calloc(strlen(home_path) + strlen(lockname) + 1, > + lockfile = calloc(LOCKFILE_HOME_PATH + strlen(lockname) + 1, > sizeof(char)); > > - strcat(lockfile, home_path); > - strcat(lockfile, "/.lock_nfp_secondary"); > + strncat(lockfile, home_path, LOCKFILE_HOME_PATH); > + strncat(lockfile, lockname, strlen(lockfile)); I guess this need to be 'LOCKFILE_HOME_PATH - strlen(lockfile) - 1' instead. But also this can be implemented as 'snprintf()' Since 'lockfile' allocated dynamically based on sizes of existing strings, using 'lockname' instead of "/.lock_nfp_secondary" will show that there won't be any overflow but tools still may be complaining about 'strcat' usage.