From patchwork Sat Apr 16 10:57:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "liujian (CE)" X-Patchwork-Id: 12815797 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1384CC433FE for ; Sat, 16 Apr 2022 10:56:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231179AbiDPK6g (ORCPT ); Sat, 16 Apr 2022 06:58:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52564 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229575AbiDPK6f (ORCPT ); Sat, 16 Apr 2022 06:58:35 -0400 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 153C75838E; Sat, 16 Apr 2022 03:56:04 -0700 (PDT) Received: from canpemm500010.china.huawei.com (unknown [172.30.72.54]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4KgVRf6GsMzFq18; Sat, 16 Apr 2022 18:53:34 +0800 (CST) Received: from huawei.com (10.175.101.6) by canpemm500010.china.huawei.com (7.192.105.118) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Sat, 16 Apr 2022 18:56:01 +0800 From: Liu Jian To: , , , , , , , , , , , , , CC: Subject: [PATCH bpf-next v4 0/3] Enlarge offset check value in bpf_skb_load_bytes Date: Sat, 16 Apr 2022 18:57:58 +0800 Message-ID: <20220416105801.88708-1-liujian56@huawei.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.175.101.6] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To canpemm500010.china.huawei.com (7.192.105.118) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net The data length of skb frags + frag_list may be greater than 0xffff, and skb_header_pointer can not handle negative offset. So here INT_MAX is used to check the validity of offset. And add the test case for the change. Liu Jian (3): net: Enlarge offset check value from 0xffff to INT_MAX in bpf_skb_load_bytes net: change skb_ensure_writable()'s write_len param to unsigned int type selftests: bpf: add test for skb_load_bytes include/linux/skbuff.h | 2 +- net/core/filter.c | 4 +- net/core/skbuff.c | 2 +- .../selftests/bpf/prog_tests/skb_load_bytes.c | 45 +++++++++++++++++++ .../selftests/bpf/progs/skb_load_bytes.c | 19 ++++++++ 5 files changed, 68 insertions(+), 4 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/skb_load_bytes.c create mode 100644 tools/testing/selftests/bpf/progs/skb_load_bytes.c