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=-9.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 266CEC43603 for ; Sat, 21 Dec 2019 06:26:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F079E206EC for ; Sat, 21 Dec 2019 06:26:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="cftViNiZ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726086AbfLUG0C (ORCPT ); Sat, 21 Dec 2019 01:26:02 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:2256 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725774AbfLUG0C (ORCPT ); Sat, 21 Dec 2019 01:26:02 -0500 Received: from pps.filterd (m0109334.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xBL6OkWr029018 for ; Fri, 20 Dec 2019 22:26:01 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=facebook; bh=eqG7cGifLkLj0mZdEgac9irYO5y0Z8NYirVp/nkf54Q=; b=cftViNiZcdUafosMqquCRAsATo3+6RTjGQscTbJwixis6j0zhGnKhUktJMuShbpxD7Cw qVaCdKV9jrzVOYaOwRzMvy8Xp7JS4m3nw62re3Y4St//dVH6f5EGU4KfXuCp4Wg1Lgeg JNfanaD2pISGGWgy5PnPJev5kpCHT5YGwQY= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 2x11nsuag6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Fri, 20 Dec 2019 22:26:01 -0800 Received: from intmgw004.05.ash5.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Fri, 20 Dec 2019 22:26:00 -0800 Received: by devbig005.ftw2.facebook.com (Postfix, from userid 6611) id E63752946127; Fri, 20 Dec 2019 22:25:59 -0800 (PST) Smtp-Origin-Hostprefix: devbig From: Martin KaFai Lau Smtp-Origin-Hostname: devbig005.ftw2.facebook.com To: CC: Alexei Starovoitov , Daniel Borkmann , David Miller , , Smtp-Origin-Cluster: ftw2c04 Subject: [PATCH bpf-next v2 02/11] bpf: Avoid storing modifier to info->btf_id Date: Fri, 20 Dec 2019 22:25:59 -0800 Message-ID: <20191221062559.1182467-1-kafai@fb.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191221062556.1182261-1-kafai@fb.com> References: <20191221062556.1182261-1-kafai@fb.com> X-FB-Internal: Safe MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-12-21_01:2019-12-17,2019-12-21 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 mlxlogscore=633 impostorscore=0 bulkscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1015 priorityscore=1501 suspectscore=13 spamscore=0 mlxscore=0 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-1912210054 X-FB-Internal: deliver Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org info->btf_id expects the btf_id of a struct, so it should store the final result after skipping modifiers (if any). It also takes this chanace to add a missing newline in one of the bpf_log() messages. Acked-by: Yonghong Song Signed-off-by: Martin KaFai Lau --- kernel/bpf/btf.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c index 7d40da240891..88359a4bccb0 100644 --- a/kernel/bpf/btf.c +++ b/kernel/bpf/btf.c @@ -3696,7 +3696,6 @@ bool btf_ctx_access(int off, int size, enum bpf_access_type type, /* this is a pointer to another type */ info->reg_type = PTR_TO_BTF_ID; - info->btf_id = t->type; if (tgt_prog) { ret = btf_translate_to_vmlinux(log, btf, t, tgt_prog->type); @@ -3707,10 +3706,14 @@ bool btf_ctx_access(int off, int size, enum bpf_access_type type, return false; } } + + info->btf_id = t->type; t = btf_type_by_id(btf, t->type); /* skip modifiers */ - while (btf_type_is_modifier(t)) + while (btf_type_is_modifier(t)) { + info->btf_id = t->type; t = btf_type_by_id(btf, t->type); + } if (!btf_type_is_struct(t)) { bpf_log(log, "func '%s' arg%d type %s is not a struct\n", @@ -3736,7 +3739,7 @@ int btf_struct_access(struct bpf_verifier_log *log, again: tname = __btf_name_by_offset(btf_vmlinux, t->name_off); if (!btf_type_is_struct(t)) { - bpf_log(log, "Type '%s' is not a struct", tname); + bpf_log(log, "Type '%s' is not a struct\n", tname); return -EINVAL; } -- 2.17.1