Sorry I cannot delete my messages above but in case someone else has
same scenario as me, you might be able to keep the error from displaying
by adding "vers=2.0" in your mount options. At least that is the
version I needed to specify for Windows 2008 and I do not see the errors
anymore upon
I am seeing this ioctl error on my console screen (before login). It
fills the screen because I have a crontab job running that mounts an SMB
share temporarily.
However, I can still create/modify/delete files on the SMB share.
I do not know which kernel version this started to show up on but
Whoops, my bad. The error code I see is slightly different than this
one. Sorry.
ioctl error in smb2_get_dfs_refer rc=-5
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https://bugs.launchpad.net/bugs/1748689
Title:
BUMP
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Title:
Mounting SMB shares with vers=3.0 in fstab gives "ioctl error in
smb2_get_dfs_refer rc=-2"
Status in dellserver:
Can we test this once 18.04.2 has been released?
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Title:
Mounting SMB shares with vers=3.0 in fstab gives "ioctl error in
** Also affects: dellserver
Importance: Undecided
Status: New
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Title:
Mounting SMB shares with vers=3.0 in fstab gives
Looks like it's potentially been fixed upstream:
https://www.spinics.net/lists/linux-cifs/msg14325.html
Can we get this patch backported to Trusty, Xenial, Artful and Bionic?
Thanks!
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I see this on 4.13.0-45-generic of Ubuntu 16.04 HWE kernels.
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Title:
Mounting SMB shares with vers=3.0 in fstab gives "ioctl error
Also confirming on 4.15.0-23. Any updates?
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Title:
Mounting SMB shares with vers=3.0 in fstab gives "ioctl error in
Any update on this issue? Having it happen pretty consistently on my
16.04 machines.
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Title:
Mounting SMB shares with vers=3.0 in
Also confirmed on 4.15.0-22:
user@host:~$ uname -a
Linux host 4.15.0-22-generic #24~16.04.1-Ubuntu SMP Fri May 18 09:46:31 UTC
2018 x86_64 x86_64 x86_64 GNU/Linux
user@host:~$ dmesg | tail
[9.579718] new mount options do not match the existing superblock, will be
ignored
[9.781330] new
I can also confirm on Xenial running 4.15.0-13:
user@host:~$ dmesg | tail
[ 1331.150999] CIFS VFS: ioctl error in smb2_get_dfs_refer rc=-5
[ 1331.197478] CIFS VFS: ioctl error in smb2_get_dfs_refer rc=-5
[ 1331.245486] CIFS VFS: ioctl error in smb2_get_dfs_refer rc=-5
[ 1631.292647] CIFS VFS:
I confirm on kernels 4.15.0.19 and 4.15.0.20.
root@CmsrvLAP2:~# umount /media/Cmsrv*
root@CmsrvLAP2:~# mount -l | grep cifs
root@CmsrvLAP2:~# mount -a
root@CmsrvLAP2:~# dmesg | tail
[5.353312] CIFS VFS: ioctl error in smb2_get_dfs_refer rc=-5
[5.354716] CIFS VFS: ioctl error in
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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Did this issue start happening after an update/upgrade? Was there a
prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.16
apport information
** Tags added: apport-collected artful
** Description changed:
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
** Description changed:
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
sec=ntlmssp,vers=3.0,credentials=/home/.smbcredentials,dir_mode=0777,file_mode=0777
in /etc/fstab gives the
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