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=-0.4 required=3.0 tests=FROM_LOCAL_DIGITS, FROM_LOCAL_HEX,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 C9A58ECE562 for ; Fri, 21 Sep 2018 06:44:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 672CF21523 for ; Fri, 21 Sep 2018 06:44:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 672CF21523 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389298AbeIUMb3 (ORCPT ); Fri, 21 Sep 2018 08:31:29 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:57033 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726479AbeIUMb3 (ORCPT ); Fri, 21 Sep 2018 08:31:29 -0400 Received: by mail-io1-f72.google.com with SMTP id a3-v6so18243760iod.23 for ; Thu, 20 Sep 2018 23:44:03 -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=5StPrAEgw/nPj/v42xi+JdATyWojYn/Lb65NN/08LB0=; b=GflyB9DdZybLJxOmT38awwc2TSp3HeAzhnSokDze063/QjzQ4Szk/N985sOjYu/WJA pJRsvWFfs07ziUztgE8+vp8yy3QLEG2DZ6mFAciPJv/1oohQgiMyuTfqYYyGTpDIwKDY i3xjAjng28C2/YOVzDGVu9I2dNA6yd2pJWsLrU0wti0QdSYH3VeucBHxkrdCo3Q1opGG /VvF4JgkSlnJFONtT1SvbsW9cuC0CREunNgQKB09uOtwvFb8qUIR9d3/apwxrYxceV5B FNqYhN2p1gdZXmK1kURGDGrzj6h5xXvXu39klvfiONuRwLovTgY7nZPCv7Kzb/SOf1As EpoQ== X-Gm-Message-State: APzg51Ads9xr+aGYox3X7I+viMS+UBdmlILIxSchjFEjX3eDbSJ8Obeh tD9VeSgb7Isfx/VKkm5hnCipkhq6xfGjn5xxDR74xnt7+ZC3 X-Google-Smtp-Source: ANB0VdZiCkYk5URA+d5hlF3a1NrgJ5sRbgLjuvdBu/rY3pIjRNka5Eqsdq5Wn8TNlmVlQ4+5r07moEStP5lhTkjIeNb4xsysjUxj MIME-Version: 1.0 X-Received: by 2002:a6b:1ecb:: with SMTP id e194-v6mr29947411ioe.93.1537512242945; Thu, 20 Sep 2018 23:44:02 -0700 (PDT) Date: Thu, 20 Sep 2018 23:44:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000014285d05765bf72a@google.com> Subject: BUG: unable to handle kernel paging request in do_mount From: syzbot To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes 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: a0cb0cabe4bb Add linux-next specific files for 20180920 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=164d6511400000 kernel config: https://syzkaller.appspot.com/x/.config?x=786006c5dafbadf6 dashboard link: https://syzkaller.appspot.com/bug?extid=73c7fe4f77776505299b compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13650fae400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=118cbf21400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+73c7fe4f77776505299b@syzkaller.appspotmail.com RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440329 RDX: 0000000020000380 RSI: 00000000200002c0 RDI: 0000000000000000 RBP: 00000000006cb018 R08: 0000000000000000 R09: 0000000000000034 R10: 00000000001800a0 R11: 0000000000000246 R12: 0000000000000003 R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000 BUG: unable to handle kernel paging request at fffffffffffffff4 PGD 966d067 P4D 966d067 PUD 966f067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 5551 Comm: syz-executor016 Not tainted 4.19.0-rc4-next-20180920+ #76 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:parse_monolithic_mount_data fs/namespace.c:2354 [inline] RIP: 0010:do_remount fs/namespace.c:2387 [inline] RIP: 0010:do_mount+0xb3b/0x1db0 fs/namespace.c:2950 Code: 06 00 48 89 c2 48 89 c3 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 24 11 00 00 48 b8 00 00 00 00 00 fc ff df <4c> 8b 33 49 8d 7e 18 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f8 10 RSP: 0018:ffff8801bb99fc28 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: 0000000000000000 RDX: 1ffffffffffffffe RSI: ffffffff81ddffac RDI: 0000000000000282 RBP: ffff8801bb99fdb0 R08: ffff8801d8b0e600 R09: ffffed003b5a5b57 R10: ffffed003b5a5b57 R11: ffff8801dad2dabb R12: ffff8801d3666830 R13: ffff8801c942cb80 R14: ffff8801c942cb80 R15: 0000000000000000 FS: 00000000010de880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff4 CR3: 00000001d84b5000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ksys_mount+0x12d/0x140 fs/namespace.c:3175 __do_sys_mount fs/namespace.c:3189 [inline] __se_sys_mount fs/namespace.c:3186 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3186 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440329 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffc6e4c9ec8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440329 RDX: 0000000020000380 RSI: 00000000200002c0 RDI: 0000000000000000 RBP: 00000000006cb018 R08: 0000000000000000 R09: 0000000000000034 R10: 00000000001800a0 R11: 0000000000000246 R12: 0000000000000003 R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: fffffffffffffff4 ---[ end trace 8aa3e592ff591401 ]--- RIP: 0010:parse_monolithic_mount_data fs/namespace.c:2354 [inline] RIP: 0010:do_remount fs/namespace.c:2387 [inline] RIP: 0010:do_mount+0xb3b/0x1db0 fs/namespace.c:2950 Code: 06 00 48 89 c2 48 89 c3 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 24 11 00 00 48 b8 00 00 00 00 00 fc ff df <4c> 8b 33 49 8d 7e 18 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f8 10 RSP: 0018:ffff8801bb99fc28 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: 0000000000000000 RDX: 1ffffffffffffffe RSI: ffffffff81ddffac RDI: 0000000000000282 RBP: ffff8801bb99fdb0 R08: ffff8801d8b0e600 R09: ffffed003b5a5b57 R10: ffffed003b5a5b57 R11: ffff8801dad2dabb R12: ffff8801d3666830 R13: ffff8801c942cb80 R14: ffff8801c942cb80 R15: 0000000000000000 FS: 00000000010de880(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff4 CR3: 00000001d84b5000 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#bug-status-tracking for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches