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=-0.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS 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 C057FC282D8 for ; Wed, 30 Jan 2019 10:35:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8CF29218A4 for ; Wed, 30 Jan 2019 10:35:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730756AbfA3KfF (ORCPT ); Wed, 30 Jan 2019 05:35:05 -0500 Received: from mail-it1-f199.google.com ([209.85.166.199]:57366 "EHLO mail-it1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730657AbfA3KfF (ORCPT ); Wed, 30 Jan 2019 05:35:05 -0500 Received: by mail-it1-f199.google.com with SMTP id n124so18499228itb.7 for ; Wed, 30 Jan 2019 02:35:04 -0800 (PST) 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=ufP68p82QmTXtlZNtzKVDXuobxIVRXGSfLgbCyjCG9Q=; b=eSPyNFvUx5gHrWv8Q1veuNgL1XJzye1tuxUJt/gTGwDHgkvJL6NNq75e/u+Y4s3mCr 6JyjY4l2qhyQF1oYfvVXSfBfhFQLFocF9ktADttF0XWeQ/h1ydISx9kpmdynZH4ktSst NSvEEjUA5T3Ugo0pRlUrvImrwCmdtSxHcA/INRQUORZr6/akcOCeWA6gaXEvbNXPb2hY EKziLuF6txd17pmyvVqBRKk9TMKIjbYzCKreMBeGo1uRB3yTZuGhIOkYlxNZY9Zbsls3 la6WaU1Il8vMq/CTqp/t9orQ/tPGekcRjWS3A163I8LyLYfvFhwcAYLdwkUse+vadN29 by0A== X-Gm-Message-State: AHQUAuZgT3mpSQfuiesDggQD+E4YwelJNl1Afi7+UwD9HmPam6DeXD4Q boUpOmpqJYLXBFu3LIxyfGl9YN1CQEuABdX0yUMhjEQW6oO4 X-Google-Smtp-Source: AHgI3IbGPAnz8aOtNz1ydqjmai5VYTM4OoW3PKb4de6qcN60PBTnFghvwL/+FwEepBfLCBuOhkZHGe+WuPT9GJjDLk9su67HFk4n MIME-Version: 1.0 X-Received: by 2002:a24:6c93:: with SMTP id w141mr5455114itb.35.1548844504569; Wed, 30 Jan 2019 02:35:04 -0800 (PST) Date: Wed, 30 Jan 2019 02:35:04 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000081e6cc0580aa76a2@google.com> Subject: BUG: unable to handle kernel paging request in dput (2) 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-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 02495e76ded5 Add linux-next specific files for 20190130 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=17a5bb64c00000 kernel config: https://syzkaller.appspot.com/x/.config?x=a2b2e9c0bc43c14d dashboard link: https://syzkaller.appspot.com/bug?extid=b382ba6a802a3d242790 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+b382ba6a802a3d242790@syzkaller.appspotmail.com BUG: unable to handle kernel paging request at ffffffffffffffea #PF error: [normal kernel read fault] PGD 9874067 P4D 9874067 PUD 9876067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 18660 Comm: syz-executor2 Not tainted 5.0.0-rc4-next-20190130 #22 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:fast_dput fs/dcache.c:700 [inline] RIP: 0010:dput+0x11e/0x790 fs/dcache.c:819 Code: e8 97 2e a8 ff 45 84 ed 0f 84 e2 03 00 00 e8 49 2d a8 ff 4c 89 e0 48 c1 e8 03 0f b6 04 18 84 c0 74 08 3c 03 0f 8e f7 04 00 00 <45> 8b 2c 24 4d 8d bc 24 80 00 00 00 31 ff 41 83 e5 08 44 89 ee e8 RSP: 0018:ffff888050bef740 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffc9000c426000 RDX: 0000000000000777 RSI: ffffffff81d9ec07 RDI: 0000000000000001 RBP: ffff888050bef7d8 R08: ffff88805fc105c0 R09: ffffed1015ce5b80 R10: ffffed1015ce5b7f R11: ffff8880ae72dbfb R12: ffffffffffffffea R13: 0000000000000001 R14: 1ffff1100a17deea R15: ffff888050bef8a0 FS: 00007f5052230700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffea CR3: 00000000a5276000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_blk_trace_setup+0x8e9/0xdb0 kernel/trace/blktrace.c:561 __blk_trace_setup+0xe3/0x190 kernel/trace/blktrace.c:577 blk_trace_ioctl+0x170/0x300 kernel/trace/blktrace.c:716 blkdev_ioctl+0x141/0x2120 block/ioctl.c:591 block_ioctl+0xee/0x130 fs/block_dev.c:1914 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x107b/0x17d0 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458089 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f505222fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458089 RDX: 00000000200002c0 RSI: 00000000c0481273 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f50522306d4 R13: 00000000004bf54d R14: 00000000004d0e38 R15: 00000000ffffffff Modules linked in: CR2: ffffffffffffffea ---[ end trace 454866349b9af1ed ]--- RIP: 0010:fast_dput fs/dcache.c:700 [inline] RIP: 0010:dput+0x11e/0x790 fs/dcache.c:819 Code: e8 97 2e a8 ff 45 84 ed 0f 84 e2 03 00 00 e8 49 2d a8 ff 4c 89 e0 48 c1 e8 03 0f b6 04 18 84 c0 74 08 3c 03 0f 8e f7 04 00 00 <45> 8b 2c 24 4d 8d bc 24 80 00 00 00 31 ff 41 83 e5 08 44 89 ee e8 RSP: 0018:ffff888050bef740 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffc9000c426000 RDX: 0000000000000777 RSI: ffffffff81d9ec07 RDI: 0000000000000001 RBP: ffff888050bef7d8 R08: ffff88805fc105c0 R09: ffffed1015ce5b80 R10: ffffed1015ce5b7f R11: ffff8880ae72dbfb R12: ffffffffffffffea R13: 0000000000000001 R14: 1ffff1100a17deea R15: ffff888050bef8a0 FS: 00007f5052230700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffea CR3: 00000000a5276000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. 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