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=-9.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 A7BD9C43441 for ; Wed, 14 Nov 2018 22:45:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6AB332145D for ; Wed, 14 Nov 2018 22:45:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="NtWv6eIV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6AB332145D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728367AbeKOI1Q (ORCPT ); Thu, 15 Nov 2018 03:27:16 -0500 Received: from mail.kernel.org ([198.145.29.99]:34416 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726774AbeKOI1P (ORCPT ); Thu, 15 Nov 2018 03:27:15 -0500 Received: from sasha-vm.mshome.net (unknown [64.114.255.114]) (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 DCFCD2251C; Wed, 14 Nov 2018 22:22:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1542234132; bh=T/g1PKjIxt36jDugOCzHFIdEDuLm7q/Xa1dPF39PNew=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NtWv6eIVx2JjPzIgUzDjhHmEyxUBK9ocwlOb2ARTbSrj3OUX2djVCgCg9UwZlkCz3 22q3sdXratygVpD4PtGm8Ic0TvKAbdsAfqJxesMXzYuNX2ZzkYiz4XKWdNTKEOqZEU WOzSanu2SL0jAsOuxZzqNFWqc2Qo3Qa1SWXgJi38= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Daniel Borkmann , Sandipan Das , Song Liu , Alexei Starovoitov , Sasha Levin Subject: [PATCH AUTOSEL 4.19 15/73] bpf: fix bpf_prog_get_info_by_fd to return 0 func_lens for unpriv Date: Wed, 14 Nov 2018 17:21:09 -0500 Message-Id: <20181114222207.98701-15-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181114222207.98701-1-sashal@kernel.org> References: <20181114222207.98701-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Daniel Borkmann [ Upstream commit 28c2fae726bf5003cd209b0d5910a642af98316f ] While dbecd7388476 ("bpf: get kernel symbol addresses via syscall") zeroed info.nr_jited_ksyms in bpf_prog_get_info_by_fd() for queries from unprivileged users, commit 815581c11cc2 ("bpf: get JITed image lengths of functions via syscall") forgot about doing so and therefore returns the #elems of the user set up buffer which is incorrect. It also needs to indicate a info.nr_jited_func_lens of zero. Fixes: 815581c11cc2 ("bpf: get JITed image lengths of functions via syscall") Signed-off-by: Daniel Borkmann Cc: Sandipan Das Cc: Song Liu Signed-off-by: Alexei Starovoitov Signed-off-by: Sasha Levin --- kernel/bpf/syscall.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 8339d81cba1d..3002e3cdc033 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -1961,6 +1961,7 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog, info.jited_prog_len = 0; info.xlated_prog_len = 0; info.nr_jited_ksyms = 0; + info.nr_jited_func_lens = 0; goto done; } -- 2.17.1