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=-5.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 46400C432C3 for ; Thu, 21 Nov 2019 07:45:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 11DA52089D for ; Thu, 21 Nov 2019 07:45:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="FPgIpz88" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726358AbfKUHpd (ORCPT ); Thu, 21 Nov 2019 02:45:33 -0500 Received: from mail-pl1-f194.google.com ([209.85.214.194]:35500 "EHLO mail-pl1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726265AbfKUHpd (ORCPT ); Thu, 21 Nov 2019 02:45:33 -0500 Received: by mail-pl1-f194.google.com with SMTP id s10so1196890plp.2; Wed, 20 Nov 2019 23:45:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:mime-version:content-disposition :user-agent; bh=K8z5lw0Y2x3HGxEqtUInasyPdyDDs0+pwtz6ApkXCy8=; b=FPgIpz88rq8puOuZAvR8yLx8Jhlk0WColC3s9M1CON3KQ/IiL5ssaY42gaI67Rw5mo VzSD22PRonUabSdzZPBVLADsknAvAzIp9kMocEMs9RIoYKKxhPV0is3x1L001Fs9rA2W 1j9ip0vmJ9vZ4dP9WbkV7hTGTlCN+mNIt5Hw9CgG5+7ypM7mO0lfCXuuIJAACS6+O9ZP 7OT6tp15PS9VIDBTow2cm+0u6N/dKKo+IqEg8Llwn5s2xlSy6tzpq6O0T32wb+LZVdaw pDjLSEH0BNXHU3GjfLpQ0h7n/gAFY6uP63XmReFOJV61xNZco20C2WyOhxMUJlnS6oMi c9Zw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition:user-agent; bh=K8z5lw0Y2x3HGxEqtUInasyPdyDDs0+pwtz6ApkXCy8=; b=AFPtlgixYtNPIF3L5l8kFuyOy7pwk9jjTlvc7Kr62KsotvXG+KBADByYih7cN8fU8A jO4FHl8AeHo32jxwWJZDIP7Se4J+Ms4bOobrnpTgs6lKH0CvZ/4RbZtVVERglw0KMy3O gGF0PAOOmDO1R6erVECCPgRCU+MjdrQ7YuBJf7tJaXUkjP4mkcoHTnhqIFJzT1CaYqCV Pcipf1xhaHS3V2NbR1Ti/kNajqJ+4y+2zpQOU3LPW/D7YoDXHWRM3bOyI51X6y3gzYjR XeosiCqPb+UUI/jO6iSxo3PS3Pqb8/CsRrv5QcX5dL6loio5smi8lIBU8/RmO/q9ize/ kLtQ== X-Gm-Message-State: APjAAAVSPqDmxH+A4MZac9XuYH/RSpugLPjfPlpL3k/Ld4p9GVqffFsK nAz3bZ27MEUkRkxOE+vQ3feqrsNI X-Google-Smtp-Source: APXvYqz5WzIjxwY2qsMQLbCCU45Lo3pW7fLt28/eagPPe5zbTCyXAnLFMVVYCpcWz7Kwg0kl3etbYw== X-Received: by 2002:a17:90a:a63:: with SMTP id o90mr9550397pjo.81.1574322332577; Wed, 20 Nov 2019 23:45:32 -0800 (PST) Received: from udknight.localhost ([183.250.89.86]) by smtp.gmail.com with ESMTPSA id em16sm1660501pjb.21.2019.11.20.23.45.30 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 20 Nov 2019 23:45:32 -0800 (PST) Received: from udknight.localhost (localhost [127.0.0.1]) by udknight.localhost (8.14.9/8.14.4) with ESMTP id xAL7jBPU015447; Thu, 21 Nov 2019 15:45:11 +0800 Received: (from root@localhost) by udknight.localhost (8.14.9/8.14.9/Submit) id xAL7jBaB015446; Thu, 21 Nov 2019 15:45:11 +0800 Date: Thu, 21 Nov 2019 15:45:11 +0800 From: Wang YanQing To: stable@vger.kernel.org Cc: stephen@networkplumber.org, ast@kernel.org, songliubraving@fb.com, yhs@fb.com, daniel@iogearbox.net, itugrok@yahoo.com, bpf@vger.kernel.org Subject: [PATCH] bpf, x32: Fix bug with ALU64 {LSH, RSH, ARSH} BPF_X shift by 0 Message-ID: <20191121074511.GC15326@udknight> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.7.1 (2016-10-04) Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org commit 68a8357ec15bdce55266e9fba8b8b3b8143fa7d2 upstream. The fix only affects x32 bpf jit, and it is critical to use x32 bpf jit on a unpatched system, so I think we should backport it to the only affected stable kernel version: v4.19 Thanks. Cc: #4.19 Signed-off-by: Wang YanQing