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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 154F9C2D0F2 for ; Wed, 1 Apr 2020 16:26:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9CB3020857 for ; Wed, 1 Apr 2020 16:26:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585758408; bh=ww7sHcCTS6voBIpOy89eNwc/M/tgfR7bv/qFldiagXg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=jhzMm6SPasQbPHrEVQJQlwOl5XJ5z8q+r1ZvshDL7PIXI1ln+p65b63t5Kw0+7X5H WUmjXdNWnFd6GAg58Uf+vT3GFB6FUH2xEldTtJY+wGXjAva0cRaosxYxXV3lKZhgwd lktsbTsWw68X4AosFRsZHCZFkepX4E7zURIvvq4A= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733249AbgDAQ0h (ORCPT ); Wed, 1 Apr 2020 12:26:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:50996 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387481AbgDAQ0a (ORCPT ); Wed, 1 Apr 2020 12:26:30 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5CD1B20BED; Wed, 1 Apr 2020 16:26:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585758389; bh=ww7sHcCTS6voBIpOy89eNwc/M/tgfR7bv/qFldiagXg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WiIGCgZ7CAs6/a3iB/Ax2ZgCn5GsfvWIOz/kWn24O7fCwhtx+OF2cdMJBBOn/facO 7AmeRt9N9W4cLAIgXcFP2CskyzmyjbzAX8JjWuycKzN/FuHr10sbqI+6ftT4u0/9GC HKaFh9mz41CatrTZhoRdH+Af/oTls2x7vrcN4fmQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yoshiki Komachi , Alexei Starovoitov Subject: [PATCH 4.19 074/116] bpf/btf: Fix BTF verification of enum members in struct/union Date: Wed, 1 Apr 2020 18:17:30 +0200 Message-Id: <20200401161552.305828471@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200401161542.669484650@linuxfoundation.org> References: <20200401161542.669484650@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yoshiki Komachi commit da6c7faeb103c493e505e87643272f70be586635 upstream. btf_enum_check_member() was currently sure to recognize the size of "enum" type members in struct/union as the size of "int" even if its size was packed. This patch fixes BTF enum verification to use the correct size of member in BPF programs. Fixes: 179cde8cef7e ("bpf: btf: Check members of struct/union") Signed-off-by: Yoshiki Komachi Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/1583825550-18606-2-git-send-email-komachi.yoshiki@gmail.com Signed-off-by: Greg Kroah-Hartman --- kernel/bpf/btf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/bpf/btf.c +++ b/kernel/bpf/btf.c @@ -1763,7 +1763,7 @@ static int btf_enum_check_member(struct struct_size = struct_type->size; bytes_offset = BITS_ROUNDDOWN_BYTES(struct_bits_off); - if (struct_size - bytes_offset < sizeof(int)) { + if (struct_size - bytes_offset < member_type->size) { btf_verifier_log_member(env, struct_type, member, "Member exceeds struct_size"); return -EINVAL;