From patchwork Mon Dec 7 08:20:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= X-Patchwork-Id: 1411917 Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=qiNx+8Bi; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CqGVd6hphz9sW9 for ; Mon, 7 Dec 2020 19:21:29 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726216AbgLGIVO (ORCPT ); Mon, 7 Dec 2020 03:21:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39230 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725905AbgLGIVO (ORCPT ); Mon, 7 Dec 2020 03:21:14 -0500 Received: from mail-pg1-x543.google.com (mail-pg1-x543.google.com [IPv6:2607:f8b0:4864:20::543]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 601FDC0613D0; Mon, 7 Dec 2020 00:20:28 -0800 (PST) Received: by mail-pg1-x543.google.com with SMTP id f17so8272357pge.6; Mon, 07 Dec 2020 00:20:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=7loJejYCZUiegYYfnZHF1zns7qEuuJti+0V+ypDNatk=; b=qiNx+8BiKnA64HSAl6dDGA0EzBv7cjOSUUdA/SF2qwTDtkBSz276uVUjf4j73FQbxT 36zXWEs+JOMebWDAsu6zfsTQ9NyCF5yFngPKk426FnHnm+IRPIJU2zstGsogqDVTfmss 79RAJVR9QAGQly1rCsd5SOvgRQezoTG595V0dWVHFqDWIJZaL6Za3gznaNVLTgDbF4/V UDN08SVJByUTsF/PimNRG5V0G0BKB7Z5zjBcCtZ2r/fZn/U4q1kIZ/Kdca5JCdaKBmAi +WZk/lQvra1COO0q+SBwwK3ZAvlYUpfJY5I/ZcTngqFdlJ25qi6qTzaASeVoSVfxnXjt RguQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=7loJejYCZUiegYYfnZHF1zns7qEuuJti+0V+ypDNatk=; b=a7dCikJyTBDZa7tDrrID+xF+Fw84eJhJ4N5YmQs43iazNIfp57mcrovAOFmjDwrHLt dCu/NDCB59CTWrWEXunFjvfcx6UgHmWeWmmtVe3klyUeHM7TNpSwvu1QxE/TL3huqZp3 uuFhIi787DTGTS7YUODBSlF+Il/fwAsqWfx2Vekxo42Ibo0ytEclGL9oMrEmdDSbz5mn Kgz/z6jpzsFFrDycdOT39QZWl6S24pFy1bA1aJU0PVtuAM+ko8qirEmE24DabgEXUwde c7wUmevB4qHjFFeFclkQoBS2N7z3Lvn+oaU02XbJGNG7UlSbO53mJSQvzXWEd7excgzw tuLA== X-Gm-Message-State: AOAM533aMJV0iNGcSQdJF9OpBfZRx7UdPmXv4Loy+GkTGlvh6eadOEdl N464rwfUJoFPxWRz0aQr4frN2cwJcr2AZQ2k X-Google-Smtp-Source: ABdhPJz9Ff4GvMEQMz32yUO0DTmI1UWRZUmuGqe+dQBoV1af5faE3ty3mxUENOoQUuxwdFBcHl4VXQ== X-Received: by 2002:a63:5712:: with SMTP id l18mr17488343pgb.79.1607329227940; Mon, 07 Dec 2020 00:20:27 -0800 (PST) Received: from btopel-mobl.ger.intel.com (fmdmzpr03-ext.fm.intel.com. [192.55.54.38]) by smtp.gmail.com with ESMTPSA id j9sm12971560pfa.58.2020.12.07.00.20.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Dec 2020 00:20:26 -0800 (PST) From: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= To: ast@kernel.org, daniel@iogearbox.net, netdev@vger.kernel.org, bpf@vger.kernel.org Cc: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , magnus.karlsson@intel.com, jonathan.lemon@gmail.com, kernel test robot Subject: [PATCH bpf-next] xsk: Validate socket state in xsk_recvmsg, prior touching socket members Date: Mon, 7 Dec 2020 09:20:08 +0100 Message-Id: <20201207082008.132263-1-bjorn.topel@gmail.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Björn Töpel In AF_XDP the socket state needs to be checked, prior touching the members of the socket. This was not the case for the recvmsg implementation. Fix that by moving the xsk_is_bound() call. Reported-by: kernel test robot Fixes: 45a86681844e ("xsk: Add support for recvmsg()") Signed-off-by: Björn Töpel Acked-by: Magnus Karlsson --- net/xdp/xsk.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) base-commit: 34da87213d3ddd26643aa83deff7ffc6463da0fc diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c index 56c46e5f57bc..e28c6825e089 100644 --- a/net/xdp/xsk.c +++ b/net/xdp/xsk.c @@ -554,12 +554,12 @@ static int xsk_recvmsg(struct socket *sock, struct msghdr *m, size_t len, int fl struct sock *sk = sock->sk; struct xdp_sock *xs = xdp_sk(sk); + if (unlikely(!xsk_is_bound(xs))) + return -ENXIO; if (unlikely(!(xs->dev->flags & IFF_UP))) return -ENETDOWN; if (unlikely(!xs->rx)) return -ENOBUFS; - if (unlikely(!xsk_is_bound(xs))) - return -ENXIO; if (unlikely(need_wait)) return -EOPNOTSUPP;