From patchwork Sun Nov 7 16:55:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 12606877 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6367BC433F5 for ; Sun, 7 Nov 2021 16:55:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4205361157 for ; Sun, 7 Nov 2021 16:55:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234172AbhKGQ6O convert rfc822-to-8bit (ORCPT ); Sun, 7 Nov 2021 11:58:14 -0500 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:55918 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232211AbhKGQ6N (ORCPT ); Sun, 7 Nov 2021 11:58:13 -0500 Received: from pps.filterd (m0109332.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 1A7FU5GZ004247 for ; Sun, 7 Nov 2021 08:55:30 -0800 Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com with ESMTP id 3c67uebpj8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Sun, 07 Nov 2021 08:55:30 -0800 Received: from intmgw001.37.frc1.facebook.com (2620:10d:c085:108::4) by mail.thefacebook.com (2620:10d:c085:11d::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.14; Sun, 7 Nov 2021 08:55:29 -0800 Received: by devbig019.vll3.facebook.com (Postfix, from userid 137359) id 90DBD8394B85; Sun, 7 Nov 2021 08:55:26 -0800 (PST) From: Andrii Nakryiko To: , , CC: , , Hengqi Chen Subject: [PATCH v4 bpf-next 2/9] libbpf: free up resources used by inner map definition Date: Sun, 7 Nov 2021 08:55:14 -0800 Message-ID: <20211107165521.9240-3-andrii@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211107165521.9240-1-andrii@kernel.org> References: <20211107165521.9240-1-andrii@kernel.org> MIME-Version: 1.0 X-FB-Internal: Safe X-FB-Source: Intern X-Proofpoint-GUID: nxncS5-b56xw5bp--rUj474JCVpcuM7D X-Proofpoint-ORIG-GUID: nxncS5-b56xw5bp--rUj474JCVpcuM7D X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.0.607.475 definitions=2021-11-07_09,2021-11-03_01,2020-04-07_01 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 spamscore=0 mlxscore=0 malwarescore=0 suspectscore=0 adultscore=1 lowpriorityscore=0 bulkscore=0 phishscore=0 priorityscore=1501 mlxlogscore=676 clxscore=1015 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2111070110 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net It's not enough to just free(map->inner_map), as inner_map itself can have extra memory allocated, like map name. Fixes: 646f02ffdd49 ("libbpf: Add BTF-defined map-in-map support") Reviewed-by: Hengqi Chen Signed-off-by: Andrii Nakryiko --- tools/lib/bpf/libbpf.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index dfd15cc60ea7..d869ebee1e27 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -9009,7 +9009,10 @@ int bpf_map__set_inner_map_fd(struct bpf_map *map, int fd) pr_warn("error: inner_map_fd already specified\n"); return libbpf_err(-EINVAL); } - zfree(&map->inner_map); + if (map->inner_map) { + bpf_map__destroy(map->inner_map); + zfree(&map->inner_map); + } map->inner_map_fd = fd; return 0; }