FWIW I can confirm that adding sec=ntlmsspi fixed our issue with 4.4.0-98. root@client:~# mount | grep share //server/share on /mnt/share type cifs (rw,nosuid,nodev,relatime,vers=3.0,sec=ntlmsspi,cache=strict,username=www-data,domain=ourdomain,uid=33,forceuid,gid=33,forcegid,addr=10.4.0.30,file_mode=0770,dir_mode=0770,nounix,mapposix,rsize=1048576,wsize=1048576,echo_interval=60,actimeo=1,user)
root@client:~# uname -a Linux client 4.4.0-98-generic #121-Ubuntu SMP Tue Oct 10 14:24:03 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1729337 Title: CIFS errors on 4.4.0-98, but not on 4.4.0-97 with same config To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1729337/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
