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=-15.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 3DE6AC76191 for ; Mon, 15 Jul 2019 14:55:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 17FFC205ED for ; Mon, 15 Jul 2019 14:55:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563202512; bh=ipCcHjIhlJAKSpf0KtDgEtW1PuWtCoxSDhCf9IAkvUM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=WUDwxLUIfUCHQ3r9S6q7mOqNbaNVfJxt6Ll7NgJcrL/XBhKkShWKoggN9uEeRlV5g hGiaQOjXGmEBsGcuBDTUTyTu8Fk2jUJ49aGc2cv4TR4ZsaQWeXLmZB5Kcz1vtK04Uq Gn9rb1bmd8gLY6+QiaSa411IFUUDYdhCYnS+bF+Y= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391414AbfGOO07 (ORCPT ); Mon, 15 Jul 2019 10:26:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:35518 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391393AbfGOO0w (ORCPT ); Mon, 15 Jul 2019 10:26:52 -0400 Received: from sasha-vm.mshome.net (unknown [73.61.17.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C311A206B8; Mon, 15 Jul 2019 14:26:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563200811; bh=ipCcHjIhlJAKSpf0KtDgEtW1PuWtCoxSDhCf9IAkvUM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=K83LbY+cJCSDQ1+4tWvcLsYHpvRNsA3HaT32mjfdNutJ+qSwA2V5/1FAC5P9ZGl9A GvpASQttmmjMNKx3zTjJHISCAcJxycni1IiLK3MRmrPhw5z+fuLY70kIeNbOduSYWU gcIh5huOCItGSqD70+qJ2iyzkSLdDvwWyMSLM/wM= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Baruch Siach , Song Liu , Jiri Olsa , Daniel Borkmann , Geert Uytterhoeven , Linus Torvalds , Sasha Levin , netdev@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 135/158] bpf: fix uapi bpf_prog_info fields alignment Date: Mon, 15 Jul 2019 10:17:46 -0400 Message-Id: <20190715141809.8445-135-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190715141809.8445-1-sashal@kernel.org> References: <20190715141809.8445-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Baruch Siach [ Upstream commit 0472301a28f6cf53a6bc5783e48a2d0bbff4682f ] Merge commit 1c8c5a9d38f60 ("Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next") undid the fix from commit 36f9814a494 ("bpf: fix uapi hole for 32 bit compat applications") by taking the gpl_compatible 1-bit field definition from commit b85fab0e67b162 ("bpf: Add gpl_compatible flag to struct bpf_prog_info") as is. That breaks architectures with 16-bit alignment like m68k. Add 31-bit pad after gpl_compatible to restore alignment of following fields. Thanks to Dmitry V. Levin his analysis of this bug history. Signed-off-by: Baruch Siach Acked-by: Song Liu Cc: Jiri Olsa Cc: Daniel Borkmann Cc: Geert Uytterhoeven Cc: Linus Torvalds Signed-off-by: Daniel Borkmann Signed-off-by: Sasha Levin --- include/uapi/linux/bpf.h | 1 + tools/include/uapi/linux/bpf.h | 1 + 2 files changed, 2 insertions(+) diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 2932600ce271..d143e277cdaf 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -2486,6 +2486,7 @@ struct bpf_prog_info { char name[BPF_OBJ_NAME_LEN]; __u32 ifindex; __u32 gpl_compatible:1; + __u32 :31; /* alignment pad */ __u64 netns_dev; __u64 netns_ino; __u32 nr_jited_ksyms; diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 66917a4eba27..bf4cd924aed5 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -2484,6 +2484,7 @@ struct bpf_prog_info { char name[BPF_OBJ_NAME_LEN]; __u32 ifindex; __u32 gpl_compatible:1; + __u32 :31; /* alignment pad */ __u64 netns_dev; __u64 netns_ino; __u32 nr_jited_ksyms; -- 2.20.1