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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS 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 2D4A1C47247 for ; Mon, 4 May 2020 10:54:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 16B8020757 for ; Mon, 4 May 2020 10:54:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728139AbgEDKyV (ORCPT ); Mon, 4 May 2020 06:54:21 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:42757 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726756AbgEDKyT (ORCPT ); Mon, 4 May 2020 06:54:19 -0400 Received: by mail-io1-f71.google.com with SMTP id d188so12738564iof.9 for ; Mon, 04 May 2020 03:54:18 -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=FO4xDaIfxTwn2pEyGinZgotdJaQt7RptE2NYxBRHOvw=; b=b2ufw38hELjNcGma8w49wgZmo6lYkBJ5bioMMChUhatUMCKUqHmmMRc8hOm+bgkeK2 5VQVTf3r9OX03DbtoCsVXI8tNncmXlQLhZOtFFnoqgKjwTyLsty76ERMANSLk8wVlnJk V0FdS8UkL5MrZ4FS4B8uBVZU6hPrnKUVRVCRdsFTS7yGy1HpZkcehtVlHth7YG10sauk eDdpDx7vBNuNRrcSNkBPDoDm8cAPuz9ZeeoPkc8b2moe7sa1nno6ObTN2GPjgpn5rHnF q11VxHtOWmdCXDluU4GEV8Pm/oEAOWT7piY/mYxHzth3KpLYtaSry0j31ZpiT3NBhM9q khmg== X-Gm-Message-State: AGi0PubzPORrK6i/tE2y8eLPRXMKjFwk0lNzC7Cjw/4Bz+XxXLxx2J4c nwR9xRfIN0pxl+kOLVNhO1myzENWGST7Kkq2Ktci3pw3x1eB X-Google-Smtp-Source: APiQypKNUiYkaUkrIbkJdG+jJows/ANxR6UAiChp+yhND1WSnh3QJQIkbTt9WpdpD2z79dSG79EbzrBWIs9odt5neWXrrKmTWlvs MIME-Version: 1.0 X-Received: by 2002:a02:cbba:: with SMTP id v26mr13967781jap.14.1588589658332; Mon, 04 May 2020 03:54:18 -0700 (PDT) Date: Mon, 04 May 2020 03:54:18 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000047642c05a4d05ae5@google.com> Subject: BUG: unable to handle kernel paging request in syscall_return_slowpath From: syzbot To: bp@alien8.de, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org 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 Hello, syzbot found the following crash on: HEAD commit: f66ed1eb Merge tag 'iomap-5.7-fixes-1' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=140f6e60100000 kernel config: https://syzkaller.appspot.com/x/.config?x=1ac152749c11ca54 dashboard link: https://syzkaller.appspot.com/bug?extid=3231e7d48f1538976553 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1415e23fe00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=146bbc3fe00000 Bisection is inconclusive: the bug happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12955ee4100000 final crash: https://syzkaller.appspot.com/x/report.txt?x=11955ee4100000 console output: https://syzkaller.appspot.com/x/log.txt?x=16955ee4100000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+3231e7d48f1538976553@syzkaller.appspotmail.com BUG: unable to handle page fault for address: fffffffff8778570 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 927c067 P4D 927c067 PUD 927e067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 7070 Comm: syz-executor231 Not tainted 5.7.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0xfffffffff8778570 Code: Bad RIP value. RSP: 0018:ffffc90001627f00 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000004000 RCX: ffff888092d64280 RDX: ffff888092d64280 RSI: 0000000000000200 RDI: 0000000000000000 RBP: 0000000000000200 R08: ffffffff8100848d R09: fffffbfff16e6e11 R10: fffffbfff16e6e11 R11: 0000000000000000 R12: 1ffff110125ac850 R13: dffffc0000000000 R14: ffff888092d64280 R15: ffff888092d64280 FS: 0000000001be0880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffff8778546 CR3: 00000000a82d6000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: syscall_return_slowpath+0x9b/0x420 arch/x86/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x49/0xb3 Modules linked in: CR2: fffffffff8778570 ---[ end trace 8e914c2fec746223 ]--- RIP: 0010:0xfffffffff8778570 Code: Bad RIP value. RSP: 0018:ffffc90001627f00 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000004000 RCX: ffff888092d64280 RDX: ffff888092d64280 RSI: 0000000000000200 RDI: 0000000000000000 RBP: 0000000000000200 R08: ffffffff8100848d R09: fffffbfff16e6e11 R10: fffffbfff16e6e11 R11: 0000000000000000 R12: 1ffff110125ac850 R13: dffffc0000000000 R14: ffff888092d64280 R15: ffff888092d64280 FS: 0000000001be0880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffff8778546 CR3: 00000000a82d6000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches