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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS 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 A05F0C43381 for ; Fri, 8 Mar 2019 13:20:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 761142133F for ; Fri, 8 Mar 2019 13:20:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726444AbfCHNUk (ORCPT ); Fri, 8 Mar 2019 08:20:40 -0500 Received: from www62.your-server.de ([213.133.104.62]:55516 "EHLO www62.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726287AbfCHNUk (ORCPT ); Fri, 8 Mar 2019 08:20:40 -0500 Received: from [88.198.220.130] (helo=sslproxy01.your-server.de) by www62.your-server.de with esmtpsa (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89_1) (envelope-from ) id 1h2FQR-0002Pi-AJ; Fri, 08 Mar 2019 14:20:35 +0100 Received: from [2a02:120b:c3fc:feb0:dda7:bd28:a848:50e2] (helo=linux.home) by sslproxy01.your-server.de with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1h2FQQ-0002yn-TM; Fri, 08 Mar 2019 14:20:35 +0100 Subject: Re: [PATCH v3 bpf]: libbpf: fixing leak when kernel does not support btf To: "Nikita V. Shirokov" , Alexei Starovoitov , Yonghong Song Cc: netdev@vger.kernel.org References: <20190308051814.19218-1-tehnerd@tehnerd.com> From: Daniel Borkmann Message-ID: <2b2c4b18-097c-e02d-c492-dfed7c4e0135@iogearbox.net> Date: Fri, 8 Mar 2019 14:20:33 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <20190308051814.19218-1-tehnerd@tehnerd.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Authenticated-Sender: daniel@iogearbox.net X-Virus-Scanned: Clear (ClamAV 0.100.2/25382/Fri Mar 8 09:55:42 2019) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 03/08/2019 06:18 AM, Nikita V. Shirokov wrote: > we could end up in situation when we have object file w/ all btf > info but kernel does not support btf yet. in this situation currently > libbpf just set obj->btf to NULL w/o freeing it first. > this patch if fixing it by making sure to run btf__free first > > v2->v3: > - adding "Fixes" tag > > v1->v2: > - adding netdev to cc > > Fixes: 8a138aed4a80 ("bpf: btf: Add BTF support to libbpf") > Signed-off-by: Nikita V. Shirokov Applied, thanks!