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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 4FDE2C41604 for ; Sat, 3 Oct 2020 11:09:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0C66F206C9 for ; Sat, 3 Oct 2020 11:09:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725791AbgJCLJS (ORCPT ); Sat, 3 Oct 2020 07:09:18 -0400 Received: from mail-il1-f206.google.com ([209.85.166.206]:35915 "EHLO mail-il1-f206.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725767AbgJCLJS (ORCPT ); Sat, 3 Oct 2020 07:09:18 -0400 Received: by mail-il1-f206.google.com with SMTP id q11so3225214ilt.3 for ; Sat, 03 Oct 2020 04:09:16 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=dTK/nKvhZxfMp3/bNpAjTTnUJuU+9eh3Dm8DpO4H7wU=; b=CzzK9A+RmtC3eJSGz4uSiPEFYeNTH7ZmCJiM3b4fGHXDOsXisRo8EkfPueD82kBBQt 2R0R3HL5icGZDbXh1dsgTFWdjRjWx6/i3YCGsog5NZurFUSQUL3l0Y3Fo2sATnRUUr// 1h0noom9hKNzk3B5zdBDPm7Hfjd3nFuW/Fa/umvE+F732MxOfDf66S5nOLJ9CA9mckP+ 1AztxTUlzpzweIQMb94SRy+Cu2u9nuAqyyfbxIVBXLAsL5xzhSKUfiHo3hlo8li/tIwz XUM+++/5IP6pwY6YFSbYTScHpmJnvHm9F8j1O0YSG+gmwaQPEtwuP6azogyVdjCzAIyY GhMg== X-Gm-Message-State: AOAM531uDZA3R8toTdwDQ1UvJ8vJseJEnlcCP7zS/hIwBw7BW5jCjdVR r8lyXwj49Ny3F69ZhYpDgscMfDxhCA5+PO+aruGFR+KN8L/E X-Google-Smtp-Source: ABdhPJwC3dNiYhgqbzVbrFviSdVxYHW+Ve3vAnb5Edpdxxqh8eJY1R6saPfuuf3rtNlBWlmCOC+trqmxVsniBFooOQE+gNzWZBId MIME-Version: 1.0 X-Received: by 2002:a02:7412:: with SMTP id o18mr6257232jac.142.1601723355672; Sat, 03 Oct 2020 04:09:15 -0700 (PDT) Date: Sat, 03 Oct 2020 04:09:15 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a4b3c205b0c24743@google.com> Subject: KASAN: out-of-bounds Read in __switch_to (2) From: syzbot To: 0x7f454c46@gmail.com, bp@alien8.de, chang.seok.bae@intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, sashal@kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: fb0155a0 Merge tag 'nfs-for-5.9-3' of git://git.linux-nfs... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15147bc3900000 kernel config: https://syzkaller.appspot.com/x/.config?x=41b736b7ce1b3ea4 dashboard link: https://syzkaller.appspot.com/bug?extid=2667188e965125ab6e7a compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11743a37900000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2667188e965125ab6e7a@syzkaller.appspotmail.com ================================================================== BUG: KASAN: out-of-bounds in arch_end_context_switch arch/x86/include/asm/paravirt.h:625 [inline] BUG: KASAN: out-of-bounds in __switch_to+0xddc/0xfe0 arch/x86/kernel/process_64.c:566 Read of size 8 at addr ffffffff89fc6bd8 by task swapper/1/0 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.9.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: The buggy address belongs to the variable: pv_ops+0x118/0x2c0 Memory state around the buggy address: ffffffff89fc6a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffff89fc6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffffff89fc6b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffffffff89fc6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffff89fc6c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 0 Comm: swapper/1 Tainted: G B 5.9.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: Kernel Offset: disabled Rebooting in 86400 seconds.. --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches