NULL pointer dereference during writeback
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
Medium
|
Unassigned |
Bug Description
This could be part of CVE-2016-3070
Happened during dd of 40GB LV:
$ sudo dd if=/dev/vg0/gentoo of=/dev/vg1/gentoo
I also used SIGUSR1 on the dd to monitor it occasionally. There was other activity at the time as well.
It appears that an attempt was made to fix this in 4.10
https:/
but it is still happening in 4.13
Nov 06 04:19:13 lakshmi kernel: BUG: unable to handle kernel NULL pointer dereference at (null)
Nov 06 04:19:13 lakshmi kernel: IP: locked_
Nov 06 04:19:13 lakshmi kernel: PGD 0
Nov 06 04:19:14 lakshmi kernel: P4D 0
Nov 06 04:19:14 lakshmi kernel:
Nov 06 04:19:14 lakshmi kernel: Oops: 0000 [#1] SMP
Nov 06 04:19:14 lakshmi kernel: Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_
Nov 06 04:19:14 lakshmi kernel: async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid0 multipath linear raid1 hid_g
Nov 06 04:19:14 lakshmi kernel: CPU: 0 PID: 67 Comm: kswapd0 Not tainted 4.13.0-16-generic #19-Ubuntu
Nov 06 04:19:14 lakshmi kernel: Hardware name: System manufacturer System Product Name/M4A89GTD-
Nov 06 04:19:14 lakshmi kernel: task: ffff93db5adc8000 task.stack: ffffb03b01d94000
Nov 06 04:19:14 lakshmi kernel: RIP: 0010:locked_
Nov 06 04:19:14 lakshmi kernel: RSP: 0018:ffffb03b01
Nov 06 04:19:14 lakshmi kernel: RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff93d9758dfe28
Nov 06 04:19:14 lakshmi kernel: RDX: 0000000000000001 RSI: 0000000005080020 RDI: ffff93d9758dea58
Nov 06 04:19:14 lakshmi kernel: RBP: ffffb03b01d97bf0 R08: 0000000000000000 R09: ffff93d9cd655468
Nov 06 04:19:14 lakshmi kernel: R10: 0000000000000228 R11: 0000000000000000 R12: ffff93d9758dea58
Nov 06 04:19:14 lakshmi kernel: R13: ffff93d9758deae0 R14: 0000000000000000 R15: 0000000000000059
Nov 06 04:19:14 lakshmi kernel: FS: 000000000000000
Nov 06 04:19:14 lakshmi kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Nov 06 04:19:14 lakshmi kernel: CR2: 0000000000000000 CR3: 00000001d7e08000 CR4: 00000000000006f0
Nov 06 04:19:14 lakshmi kernel: Call Trace:
Nov 06 04:19:14 lakshmi kernel: inode_io_
Nov 06 04:19:14 lakshmi kernel: evict+0x55/0x1a0
Nov 06 04:19:14 lakshmi kernel: dispose_
Nov 06 04:19:14 lakshmi kernel: prune_icache_
Nov 06 04:19:14 lakshmi kernel: super_cache_
Nov 06 04:19:14 lakshmi kernel: shrink_
Nov 06 04:19:14 lakshmi kernel: shrink_
Nov 06 04:19:14 lakshmi kernel: shrink_
Nov 06 04:19:14 lakshmi kernel: kswapd+0x2cc/0x750
Nov 06 04:19:14 lakshmi kernel: kthread+0x125/0x140
Nov 06 04:19:14 lakshmi kernel: ? mem_cgroup_
Nov 06 04:19:14 lakshmi kernel: ? kthread_
Nov 06 04:19:14 lakshmi kernel: ret_from_
Nov 06 04:19:14 lakshmi kernel: Code: 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 56 41 55 41 54 53 4c 8d af 88 00 00 00 49 89 fc
Nov 06 04:19:14 lakshmi kernel: RIP: locked_
Nov 06 04:19:14 lakshmi kernel: CR2: 0000000000000000
Nov 06 04:19:14 lakshmi kernel: ---[ end trace 5aa11bcf674e53cc ]---
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: linux-image-
ProcVersionSign
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/
CurrentDesktop: ubuntu:GNOME
Date: Mon Nov 6 06:59:50 2017
HibernationDevice: RESUME=
InstallationDate: Installed on 2017-11-05 (0 days ago)
InstallationMedia: Ubuntu-Server 17.10 "Artful Aardvark" - Release amd64 (20171017.1)
MachineType: System manufacturer System Product Name
ProcEnviron:
TERM=xterm-
PATH=(custom, no user)
XDG_RUNTIME_
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.169
RfKill:
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/05/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3029
dmi.board.
dmi.board.name: M4A89GTD-PRO/USB3
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.
dmi.modalias: dmi:bvnAmerican
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: System Product Name
dmi.product.
dmi.sys.vendor: System manufacturer
CVE References
description: | updated |
description: | updated |
tags: | added: kernel-bug |
This change was made by a bot.