It appears the issue is not occuring in 4.16-rc1

** Tags added: kernel-fixed-upstream

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

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  Mounting SMB shares with vers=3.0 in fstab gives "ioctl error in
  smb2_get_dfs_refer rc=-2"

Status in linux package in Ubuntu:

Bug description:
  Xubuntu 17.10 artful
  Kernel: x86_64 Linux 4.13.0-32.35-generic
  cifs-utils 2:6.7-1
  smbclient  2:4.6.7+dfsg-1ubuntu3.1

  Mounting an SMB share with

  in /etc/fstab gives the error: "CIFS VFS: ioctl error in
  smb2_get_dfs_refer rc=-2" in dmesg.

  Shares mounted this way are readable, but writing data to them (or using 
programs such as EasyTAG to write to them) ultimately fails. This bug did not 
occur in kernel 4.10. Mounting the share(s) with vers=1.0 does not give the 
error, but this is a haphazard fix as SMB v3.0 carries many security features 
with it not avaliable in SMB 1.0.
  ApportVersion: 2.20.7-0ubuntu3.7
  Architecture: amd64
  CurrentDesktop: XFCE
  DistroRelease: Ubuntu 17.10
  HibernationDevice: RESUME=/dev/mapper/DeusVitam--vg-swap_1
   Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] 
failed with exit code 1: Hint: You are currently not seeing messages from other 
users and the system.
         Users in the 'systemd-journal' group can see all messages. Pass -q to
         turn off this notice.
   No journal files were opened due to insufficient permissions.
  MachineType: ASUS All Series
  Package: linux (not installed)
  ProcFB: 0 amdgpudrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-32-generic 
root=/dev/mapper/hostname--vg-root ro splash quiet amdgpu.cik_support=1 
  ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
   linux-restricted-modules-4.13.0-32-generic N/A
   linux-backports-modules-4.13.0-32-generic  N/A
   linux-firmware                             1.169.3
  Tags:  artful
  Uname: Linux 4.13.0-32-generic x86_64
  UpgradeStatus: Upgraded to artful on 2018-02-05 (7 days ago)
  UserGroups: libvirt libvirtd sudo wireshark
  _MarkForUpload: True 03/16/2016
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0701
  dmi.board.asset.tag: To be filled by O.E.M. Z97-E/USB 3.1
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
dmi:bvnAmericanMegatrendsInc.:bvr0701:bd03/16/2016:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnZ97-E/USB3.1:rvrRevX.0x:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: ASUS MB All Series
  dmi.product.version: System Version
  dmi.sys.vendor: ASUS

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