search for: krb5_tc_openclose

...cifs.upcall only had 5 commits affecting it between these 2 releases: $ git log --pretty=oneline cifs-utils-6.6...cifs-utils-6.4 cifs.upcall.c 7852bec cifs.upcall: stop passing around ccache name strings 39dbb7b cifs.upcall: make get_tgt_time take a ccache arg 3db6b3a cifs.upcall: remove KRB5_TC_OPENCLOSE a3743af cifs.upcall: make the krb5_context a static global variable 9be6e88 cifs.upcall: use krb5 routines to get default ccname It seems the way cached credentials are searched changed, which your logs show if you diff them: uid=0 creduid=0 user=smbadmin at PHYSICS.WISC.EDU -pid=27600...

...new context for every function. Just     do it once and reuse as needed.          Signed-off-by: Jeff Layton <jlayton at samba.org> commit 3db6b3a814a2908b230fcfbdb82846775e56dd93 Author: Jeff Layton <jlayton at samba.org> Date:   Wed Aug 24 11:39:06 2016 -0400     cifs.upcall: remove KRB5_TC_OPENCLOSE          The header file says that this is deprecated, and all of the info I've     seen about it mentioned that it was for performance more than     correctness. It dates back to the original code dump from Igor, so I     think we're safe to just drop it at this point.          Signed-off-...

Hello, On Debian 9 (stretch prerelease) I am able to mount with the following command with root using the following command: mount -t cifs //smb.physics.wisc.edu/smb /smb -osec=krb5,multiuser,username=smbadmin at PHYSICS.WISC.EDU --verbose root can also access files as expected However, when cifs-utils 6.6-5 is installed, a different user cannot access as expected: ls /smb ls: cannot