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=-16.6 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 3204FC10F00 for ; Fri, 15 Mar 2019 19:52:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F2793218E2 for ; Fri, 15 Mar 2019 19:52:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="qeml8KMl" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727495AbfCOTwO (ORCPT ); Fri, 15 Mar 2019 15:52:14 -0400 Received: from mail-oi1-f202.google.com ([209.85.167.202]:48637 "EHLO mail-oi1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727453AbfCOTwK (ORCPT ); Fri, 15 Mar 2019 15:52:10 -0400 Received: by mail-oi1-f202.google.com with SMTP id p65so4479482oib.15 for ; Fri, 15 Mar 2019 12:52:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=o99IPl+uG2EzV+A51yAxAJoGFkhXN8vGRgmKAMdYgSA=; b=qeml8KMlP7rmAvIxGUwmqXR6s58tv3WFmWASkki2NWsIADrbc1k8lfVc0+MTWbLpzs TVLOcfO6bk+g3/mT4x135nyZgaRh/a1cI0EJSPVigzGsRAp8PAEjxUHPFZAzqhmXZx4l 8Q3KL5oxK5OHSh9sOaBJzftYgvN7gNgSHSwrNoWatq8tKEtYq3SVrekzbwazA+QWLKeH U6r1Zznc3OnEUZ0dR61U5DX56ScUlBeamodtGHalBVARU3JboxCMy3bCQIt/yf/PIiTQ 7ti2uUkzpKUEL7B+2/dvfA9GvioOMJDdEfC7KsiAuJ+0KTfpgnd+IOQxpTKu3Bl4+qOo qSqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=o99IPl+uG2EzV+A51yAxAJoGFkhXN8vGRgmKAMdYgSA=; b=NvDIMV1/6Qw1NYePoGYZlVTp+lsEoGKvemO0vV6RZb/TNAI3vGoRf3fRS5znR9X18+ UrX3flkJjaCEaYCER0I/BJArpeoeG1GmC/RxtI0Ega7ccyBcZQFXIQRXwIlzVEnRTODq xH2EBFJDpvD0BVOyAkS8nxQsnuA30xCbZY3L5dU1ZwNv0r80ACl43UpxJUEDQPLNwX/q eUGjg7MFQDr5WNDF9heP2Ge8DqWFk9etho9MdLDG2HjwMZi52bwUBUSgcdh7zihr3PGi ckh5z8NTWYClbLVqqNQ/vcimGQCjVuk7eh2mJDDt6YHjvC5/V7AvRhNoL2gPJa3pANY0 DMVg== X-Gm-Message-State: APjAAAV3sAy+ytyY7TCuUILFdqigpqIZuRlpB6lxZWrfdLVCWQ7aS7e7 f8Tl53V1zLSvMML2Xnshsraep8l1T4TArFQ2 X-Google-Smtp-Source: APXvYqxLoKEgsAEPjIF9NsjndQ5gVGqmokYLJoZMnp0FGqwROodj4iKJAPngQ8EF97Yh5xKIjIbFflxcHuXMaJlJ X-Received: by 2002:aca:2409:: with SMTP id n9mr3111631oic.19.1552679529309; Fri, 15 Mar 2019 12:52:09 -0700 (PDT) Date: Fri, 15 Mar 2019 20:51:32 +0100 In-Reply-To: Message-Id: <56d3373c1c5007d776fcd5de4523f4b9da341fb6.1552679409.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.360.g471c308f928-goog Subject: [PATCH v11 08/14] net, arm64: untag user pointers in tcp_zerocopy_receive From: Andrey Konovalov To: Catalin Marinas , Will Deacon , Mark Rutland , Robin Murphy , Kees Cook , Kate Stewart , Greg Kroah-Hartman , Andrew Morton , Ingo Molnar , "Kirill A . Shutemov" , Shuah Khan , Vincenzo Frascino , Eric Dumazet , "David S. Miller" , Alexei Starovoitov , Daniel Borkmann , Steven Rostedt , Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Chintan Pandya , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. tcp_zerocopy_receive() uses provided user pointers for vma lookups, which can only by done with untagged pointers. Untag user pointers in this function. Signed-off-by: Andrey Konovalov --- net/ipv4/tcp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 6baa6dc1b13b..89db3b4fc753 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1758,6 +1758,8 @@ static int tcp_zerocopy_receive(struct sock *sk, int inq; int ret; + address = untagged_addr(address); + if (address & (PAGE_SIZE - 1) || address != zc->address) return -EINVAL; -- 2.21.0.360.g471c308f928-goog From mboxrd@z Thu Jan 1 00:00:00 1970 From: andreyknvl at google.com (Andrey Konovalov) Date: Fri, 15 Mar 2019 20:51:32 +0100 Subject: [PATCH v11 08/14] net, arm64: untag user pointers in tcp_zerocopy_receive In-Reply-To: References: Message-ID: <56d3373c1c5007d776fcd5de4523f4b9da341fb6.1552679409.git.andreyknvl@google.com> This patch is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. tcp_zerocopy_receive() uses provided user pointers for vma lookups, which can only by done with untagged pointers. Untag user pointers in this function. Signed-off-by: Andrey Konovalov --- net/ipv4/tcp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 6baa6dc1b13b..89db3b4fc753 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1758,6 +1758,8 @@ static int tcp_zerocopy_receive(struct sock *sk, int inq; int ret; + address = untagged_addr(address); + if (address & (PAGE_SIZE - 1) || address != zc->address) return -EINVAL; -- 2.21.0.360.g471c308f928-goog From mboxrd@z Thu Jan 1 00:00:00 1970 From: andreyknvl@google.com (Andrey Konovalov) Date: Fri, 15 Mar 2019 20:51:32 +0100 Subject: [PATCH v11 08/14] net, arm64: untag user pointers in tcp_zerocopy_receive In-Reply-To: References: Message-ID: <56d3373c1c5007d776fcd5de4523f4b9da341fb6.1552679409.git.andreyknvl@google.com> Content-Type: text/plain; charset="UTF-8" Message-ID: <20190315195132.HAMSvpZDp-MgiXvK8VGJzaCRWrc3n17UTxUTPbDhX2U@z> This patch is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. tcp_zerocopy_receive() uses provided user pointers for vma lookups, which can only by done with untagged pointers. Untag user pointers in this function. Signed-off-by: Andrey Konovalov --- net/ipv4/tcp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 6baa6dc1b13b..89db3b4fc753 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1758,6 +1758,8 @@ static int tcp_zerocopy_receive(struct sock *sk, int inq; int ret; + address = untagged_addr(address); + if (address & (PAGE_SIZE - 1) || address != zc->address) return -EINVAL; -- 2.21.0.360.g471c308f928-goog 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=-16.6 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 CE26CC10F0B for ; Fri, 15 Mar 2019 19:52:11 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 81D3F21901 for ; Fri, 15 Mar 2019 19:52:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="qeml8KMl" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 81D3F21901 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 263916B02B5; Fri, 15 Mar 2019 15:52:11 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 23A806B02B6; Fri, 15 Mar 2019 15:52:11 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1508F6B02B7; Fri, 15 Mar 2019 15:52:11 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-oi1-f198.google.com (mail-oi1-f198.google.com [209.85.167.198]) by kanga.kvack.org (Postfix) with ESMTP id D570B6B02B5 for ; Fri, 15 Mar 2019 15:52:10 -0400 (EDT) Received: by mail-oi1-f198.google.com with SMTP id c203so2694817oib.20 for ; Fri, 15 Mar 2019 12:52:10 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:dkim-signature:date:in-reply-to:message-id :mime-version:references:subject:from:to:cc; bh=o99IPl+uG2EzV+A51yAxAJoGFkhXN8vGRgmKAMdYgSA=; b=LmjCIuSYvQXDgkCArSRZR8oe5ZGe9crCxZqGm4CYJSq36DScto8sAs7oAvwY21a/lN j9KxbiY4G515BzomSyuJ7XiJB2S8wqkowVFONNXtUzg5IN5AyiaOStC7jRmSRp2dGqEF 9fJKj/rUZG6vFhbkOi+l87AFBdper9tQQQT3v7UKNbQmpae4FNAgAIZYwbNBuFBH+U/2 TSzcoaGKw/WR2k2p/uU2+txY5qn+stBQaMPxHBe/MiZ9a/8UdW+9Bh0fEnbW8SlLh/5o qKem/t5+fxuMhZ3j7SECQ3pura3zwM4PVaDtd2AQoIPG+iSr1OavJJV+BbvHa5PuBznz yhUg== X-Gm-Message-State: APjAAAVVjHtQ7MVI+C3yQjybfd8gT0n3rQbMxLx3vo1H4x5yYaPiq1OH 4PC8IubyjcDrz7jbzH0DCM1d0CZywaczRlISPx7QMd2oNxG3nGd/ODs/fhJkR2B3v0WX84E6t3Q JX8m4q86HCIv+UB2Lv6pc9sYwyf6toHm6skeO0yR7+VOkGl4dlN/AoVpr2PTiBP1jnw== X-Received: by 2002:a9d:6515:: with SMTP id i21mr3368544otl.325.1552679530427; Fri, 15 Mar 2019 12:52:10 -0700 (PDT) X-Received: by 2002:a9d:6515:: with SMTP id i21mr3368510otl.325.1552679529653; Fri, 15 Mar 2019 12:52:09 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1552679529; cv=none; d=google.com; s=arc-20160816; b=MGtOB1Lr9yEo7N9K0T2ElQkVjQ3tG+n5GD5/78Q42q91P8vRDu0uX1sdUrVlBPdFiO fq2bWZS7wjQyzvaT1TxQh9F5izSngSpC8ZXRGXFr4AoiH1gAb651SMlqYU6ZAonvOvp9 I0lJSPlavzo9Rsr6JHnNO5UgYXMRZocp2hqj9c3BcBMgO6GaqOg7ysJ4ZktYI0cfWOiA ZJstYdwRjjEfgow5UqG1AJf0Q40ldn8Nwij/ZC+AbM9weeldTLaPy0+H5ft91QP4Wc6E 4h3ZQWGVtwqDux1pxWUqkSmKBFkOARYph0Zgh5nOjV7Np399D9Aj68msg+Hip9pTdnf5 hULQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:dkim-signature; bh=o99IPl+uG2EzV+A51yAxAJoGFkhXN8vGRgmKAMdYgSA=; b=TVdCXdBgMqMo9+nESj7n+NWCl2E9Emhc7ypK1DduvDO5U+usD/2zacTlny6PoPpY1x ljSweOtbJHLtGc/VZQRhSZAQkxij9KwP8b7L8GRX99vUU/Upmk04PfzreVteVfGs3hsh PEQ5vvpLbYPe+owx0A71VPtxLA3irWI/q+MrrLzxBOJpy5ePkJCH0KQPfTVZutVvd+1x 6ustZV+E//mCCpSzLYJg6RsXYiJ/IHWVlIJxWOFzyZ1dO5pxgNwQbSc3RewNIhTEWBHm //VNmhCGzgg4kIkY3atZ1InauyoNvxeDcr1tVGHRT8avTUl0n/VShG/5GZ2ZvaYpNHoE oyxg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b=qeml8KMl; spf=pass (google.com: domain of 3aqkmxaokcigmzp3qawz7xs00sxq.o0yxuz69-yyw7mow.03s@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) smtp.mailfrom=3aQKMXAoKCIgmzp3qAwz7xs00sxq.o0yxuz69-yyw7mow.03s@flex--andreyknvl.bounces.google.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from mail-sor-f73.google.com (mail-sor-f73.google.com. [209.85.220.73]) by mx.google.com with SMTPS id b204sor1762046oii.147.2019.03.15.12.52.09 for (Google Transport Security); Fri, 15 Mar 2019 12:52:09 -0700 (PDT) Received-SPF: pass (google.com: domain of 3aqkmxaokcigmzp3qawz7xs00sxq.o0yxuz69-yyw7mow.03s@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) client-ip=209.85.220.73; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b=qeml8KMl; spf=pass (google.com: domain of 3aqkmxaokcigmzp3qawz7xs00sxq.o0yxuz69-yyw7mow.03s@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) smtp.mailfrom=3aQKMXAoKCIgmzp3qAwz7xs00sxq.o0yxuz69-yyw7mow.03s@flex--andreyknvl.bounces.google.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=o99IPl+uG2EzV+A51yAxAJoGFkhXN8vGRgmKAMdYgSA=; b=qeml8KMlP7rmAvIxGUwmqXR6s58tv3WFmWASkki2NWsIADrbc1k8lfVc0+MTWbLpzs TVLOcfO6bk+g3/mT4x135nyZgaRh/a1cI0EJSPVigzGsRAp8PAEjxUHPFZAzqhmXZx4l 8Q3KL5oxK5OHSh9sOaBJzftYgvN7gNgSHSwrNoWatq8tKEtYq3SVrekzbwazA+QWLKeH U6r1Zznc3OnEUZ0dR61U5DX56ScUlBeamodtGHalBVARU3JboxCMy3bCQIt/yf/PIiTQ 7ti2uUkzpKUEL7B+2/dvfA9GvioOMJDdEfC7KsiAuJ+0KTfpgnd+IOQxpTKu3Bl4+qOo qSqQ== X-Google-Smtp-Source: APXvYqxLoKEgsAEPjIF9NsjndQ5gVGqmokYLJoZMnp0FGqwROodj4iKJAPngQ8EF97Yh5xKIjIbFflxcHuXMaJlJ X-Received: by 2002:aca:2409:: with SMTP id n9mr3111631oic.19.1552679529309; Fri, 15 Mar 2019 12:52:09 -0700 (PDT) Date: Fri, 15 Mar 2019 20:51:32 +0100 In-Reply-To: Message-Id: <56d3373c1c5007d776fcd5de4523f4b9da341fb6.1552679409.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.360.g471c308f928-goog Subject: [PATCH v11 08/14] net, arm64: untag user pointers in tcp_zerocopy_receive From: Andrey Konovalov To: Catalin Marinas , Will Deacon , Mark Rutland , Robin Murphy , Kees Cook , Kate Stewart , Greg Kroah-Hartman , Andrew Morton , Ingo Molnar , "Kirill A . Shutemov" , Shuah Khan , Vincenzo Frascino , Eric Dumazet , "David S. Miller" , Alexei Starovoitov , Daniel Borkmann , Steven Rostedt , Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Chintan Pandya , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This patch is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. tcp_zerocopy_receive() uses provided user pointers for vma lookups, which can only by done with untagged pointers. Untag user pointers in this function. Signed-off-by: Andrey Konovalov --- net/ipv4/tcp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 6baa6dc1b13b..89db3b4fc753 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1758,6 +1758,8 @@ static int tcp_zerocopy_receive(struct sock *sk, int inq; int ret; + address = untagged_addr(address); + if (address & (PAGE_SIZE - 1) || address != zc->address) return -EINVAL; -- 2.21.0.360.g471c308f928-goog 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=-9.0 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, 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 70EA0C43381 for ; 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Fri, 15 Mar 2019 12:52:09 -0700 (PDT) Date: Fri, 15 Mar 2019 20:51:32 +0100 In-Reply-To: Message-Id: <56d3373c1c5007d776fcd5de4523f4b9da341fb6.1552679409.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.360.g471c308f928-goog Subject: [PATCH v11 08/14] net, arm64: untag user pointers in tcp_zerocopy_receive From: Andrey Konovalov To: Catalin Marinas , Will Deacon , Mark Rutland , Robin Murphy , Kees Cook , Kate Stewart , Greg Kroah-Hartman , Andrew Morton , Ingo Molnar , "Kirill A . Shutemov" , Shuah Khan , Vincenzo Frascino , Eric Dumazet , "David S. Miller" , Alexei Starovoitov , Daniel Borkmann , Steven Rostedt , Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190315_125213_447517_2D6318CC X-CRM114-Status: GOOD ( 11.43 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Brodsky , Chintan Pandya , Jacob Bramley , Ruben Ayrapetyan , Szabolcs Nagy , Andrey Konovalov , Lee Smith , Kostya Serebryany , Dmitry Vyukov , Ramana Radhakrishnan , Luc Van Oostenryck , Dave Martin , Evgeniy Stepanov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org This patch is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. tcp_zerocopy_receive() uses provided user pointers for vma lookups, which can only by done with untagged pointers. Untag user pointers in this function. Signed-off-by: Andrey Konovalov --- net/ipv4/tcp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 6baa6dc1b13b..89db3b4fc753 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1758,6 +1758,8 @@ static int tcp_zerocopy_receive(struct sock *sk, int inq; int ret; + address = untagged_addr(address); + if (address & (PAGE_SIZE - 1) || address != zc->address) return -EINVAL; -- 2.21.0.360.g471c308f928-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel