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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 93379C47E48 for ; Wed, 7 Jul 2021 03:53:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 80EE061CB9 for ; Wed, 7 Jul 2021 03:53:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230209AbhGGDzi (ORCPT ); Tue, 6 Jul 2021 23:55:38 -0400 Received: from szxga03-in.huawei.com ([45.249.212.189]:10321 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229989AbhGGDzb (ORCPT ); Tue, 6 Jul 2021 23:55:31 -0400 Received: from dggeme751-chm.china.huawei.com (unknown [172.30.72.54]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4GKQPm5D5jz76Ln; Wed, 7 Jul 2021 11:48:28 +0800 (CST) Received: from k03.huawei.com (10.67.174.111) by dggeme751-chm.china.huawei.com (10.3.19.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Wed, 7 Jul 2021 11:52:48 +0800 From: He Fengqing To: , , , , , , , CC: , , , , Subject: [bpf-next 0/3] potential memleak and use after free in bpf verifier Date: Wed, 7 Jul 2021 04:38:08 +0000 Message-ID: <20210707043811.5349-1-hefengqing@huawei.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.67.174.111] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggeme751-chm.china.huawei.com (10.3.19.97) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org While reading the code of bpf verifier, I found these two issues. Patch 1 move the bpf_prog_clone_free function into filter.h, so we can use it in other file. Patch 2 fix memleak in an error handling path in bpf_patch_insn_data function. Patch 3 fix a use after free in bpf_check function. He Fengqing (3): bpf: Move bpf_prog_clone_free into filter.h file bpf: Fix a memory leak in an error handling path in 'bpf_patch_insn_data()' bpf: Fix a use after free in bpf_check() include/linux/filter.h | 17 ++++++++++++- kernel/bpf/core.c | 27 +++++--------------- kernel/bpf/verifier.c | 58 ++++++++++++++++++++++++++++++++---------- net/core/filter.c | 2 +- 4 files changed, 68 insertions(+), 36 deletions(-) -- 2.25.1