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[Andy Whitcroft <apw@xxxxxxxxxxxxx>]

This bug was nominated against a series that is no longer supported, ie
artful.  The bug task representing the artful nomination is being closed
as Won't Fix.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu Artful)
       Status: Fix Committed => Won't Fix

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https://bugs.launchpad.net/bugs/1729337

Title:
  CIFS errors on 4.4.0-98, but not on 4.4.0-97 with same config

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Zesty:
  In Progress
Status in linux source package in Artful:
  Won't Fix

Bug description:
  == SRU Justification ==
  The bug reporter stated they have a cluster of servers that applied Xenial updates
  and then were unable to mount CIFS shares after upgrading to 4.4.0-98. The
  same machines on 4.4.0-97 do not hit the regression.  It was found that the
  regression is fixed by mainline commit:
  4587eee04e2a ("SMB3: Validate negotiate request must always be signed").

  This fix is required in all Ubuntu supported releases.  Commit 4587eee04e2a
  landed in mailine as of 4.14-rc7.  It  was also cc'd to upstream stable,
  but it has not landed in any stable releases yet, which is the reason for
  this SRU.


  == Fix ==
  commit 4587eee04e2ac7ac3ac9fa2bc164fb6e548f99cd
  Author: Steve French <smfrench@xxxxxxxxx>
  Date:   Wed Oct 25 15:58:31 2017 -0500
      SMB3: Validate negotiate request must always be signed

  == Regression Potential ==
  This patch is to fix a regression.  It was also cc'd to upstream stable, so
  it received addition review upstream.

  We have a cluster of servers that applied a security update overnight
  and were unable to mount CIFS shares after upgrading to 4.4.0-98.  The
  same machines on 4.4.0-97 were fine the night before, and are fine
  after downgrading.  The only error message CIFS would report, even on
  verbose, was:

  [  257.089876] CIFS VFS: validate protocol negotiate failed: -11
  [  257.089964] CIFS VFS: cifs_mount failed w/return code = -5

  Rebooting did not help.  Nor did attempting to mount the share
  manually using mount -t cifs.

  Here's the offending line from our /etc/fstab (with hostnames
  sanitized):

  //server/share /mnt/share cifs rw,user,credentials=/etc/samba/credentials.share,uid=33,gid=33,file_mode=0770,dir_mode=0770
  ,exec,soft,noserverino,vers=3.0 0 0

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-98-generic 4.4.0-98.121
  ProcVersionSignature: Ubuntu 4.4.0-98.121-generic 4.4.90
  Uname: Linux 4.4.0-98-generic x86_64
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Nov  1 07:56 seq
   crw-rw---- 1 root audio 116, 33 Nov  1 07:56 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.20.1-0ubuntu2.10
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Date: Wed Nov  1 08:49:47 2017
  HibernationDevice: RESUME=/dev/mapper/ubuntu--template--vg-swap_1
  InstallationDate: Installed on 2016-12-16 (319 days ago)
  InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  Lsusb: Error: command ['lsusb'] failed with exit code 1:
  MachineType: VMware, Inc. VMware Virtual Platform
  PciMultimedia:

  ProcFB: 0 svgadrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-98-generic root=/dev/mapper/ubuntu--template--vg-root ro
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-98-generic N/A
   linux-backports-modules-4.4.0-98-generic  N/A
   linux-firmware                            1.157.13
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/21/2015
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: 6.00
  dmi.board.name: 440BX Desktop Reference Platform
  dmi.board.vendor: Intel Corporation
  dmi.board.version: None
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 1
  dmi.chassis.vendor: No Enclosure
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd09/21/2015:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
  dmi.product.name: VMware Virtual Platform
  dmi.product.version: None
  dmi.sys.vendor: VMware, Inc.

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