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OS: Ubuntu Desktop 16.04.3
We connect to Windows DFS with our Linux 16.04 workstations to let users
access the windows shares. Until kernel version 4.4.0-96 this worked
without any issues. However if a computer updates to kernel
4.4.0.97.102, using the same configs and samba version, it stops working
and reports a "ls: cannot access xx: File name too long" error. (where
xx is a foldername)
Also if you run "ls -all" you will see:
d????????? ? ? ? ? ? Applications
on the same computer selecting kernel 4.4.0.21.22 at grub menu:
drwx--x--x 2 root root 0 Oct 20 16:44 Applications
Mount commando output (removed hostnames and IP numbers ) on computer
with kernel 4.4.0.21.22
//XXX/Public on /vol/winshare/Public type cifs
(rw,relatime,vers=1.0,sec=krb5,cache=strict,multiuser,uid=0,noforceuid,gid=0,noforcegid,addr=x.x.x.x
file_mode=0755,dir_mode=0755,nounix,mapposix,noperm,rsize=61440,wsize=65536,actimeo=1)
Mount commando output (removed hostnames and IP numbers ) on the same
computer with kernel 4.4.0.97.102
//XXX/Public on /vol/winshare/Public type cifs
(rw,relatime,vers=1.0,sec=krb5,cache=strict,multiuser,uid=0,noforceuid,gid=0,noforcegid,addr=x.x.x.x,file_mode=0755,dir_mode=0755,nounix,mapposix,noperm,rsize=61440,wsize=65536,echo_interval=60,actimeo=1)
During these tests the only thing that changed is the running kernel, no
other changes were applied.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: bot-comment cifs dfs kernel mount samba windows
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kernel 4.4.0.97.102 breaks DFS
https://bugs.launchpad.net/bugs/1725322
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