Comment 0 for bug 1612135

Expected: being able to mount subfilesystems via cifs mount.
What happens: permission denied even though there is permission

I am denied access to the subfilesystems on a samba server. The top level filesystem itself is unaffected but dfs links seem to run into 'Operation not permitted' problems. When accessing the subfilesystem on the mount as root it mounts correctly. The standard user is then also able to access the subfilesystem.

This only happens when the client uses kernel 4.4.0-34 (#53). When I revert my client to an older kernel (4.4.0-21) everything works. Using the older kernel the normal user can directly ls into the subfilesystem.

This is bug is very similar to bug #1603719 (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1603719). However, the released fix (in 4.4.0-33.52) does not seem to fix it for cifs.

Extra info:
Ubuntu 16.04.1 LTS
cifs-utils version: 2:6.4-1ubuntu1
Mount options are minimal: sec=krb5,uid=XXXX,cruid=XXX

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.15
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: KDE
Date: Thu Aug 11 10:32:20 2016
InstallationDate: Installed on 2016-04-28 (104 days ago)
InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.update-motd.d.91-release-upgrade: [deleted]