RHEL7: CIFS mount point displays the warning "ioctl error in smb2_get_dfs_refer rc=-5" when not using DFS

Issue

• When mounting a CIFS share, the following warning is displayed:

Jun 21 16:48:15 server kernel: Key type cifs.spnego registered
Jun 21 16:48:15 server kernel: Key type cifs.idmap registered
Jun 21 16:48:15 server kernel: CIFS VFS: ioctl error in smb2_get_dfs_refer rc=-5
Jun 21 16:48:15 server kernel: CIFS VFS: ioctl error in smb2_get_dfs_refer rc=-5
Jun 21 16:48:15 server kernel: CIFS VFS: ioctl error in smb2_get_dfs_refer rc=-5
Jun 21 16:48:15 server kernel: CIFS VFS: ioctl error in smb2_get_dfs_refer rc=-5
Jun 21 16:48:15 server kernel: CIFS VFS: ioctl error in smb2_get_dfs_refer rc=-5
Jun 21 16:48:15 server kernel: CIFS VFS: ioctl error in smb2_get_dfs_refer rc=-5

• The share works without any write/access error.