cifs: fix use after free for iface while disabling secondary channels

[ Upstream commit a15ccef8 ]

We were deferencing iface after it has been released. Fix is to
release after all dereference instances have been encountered.

Signed-off-by: Ritvik Budhiraja <rbudhiraja@microsoft.com>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Closes: https://lore.kernel.org/r/202311110815.UJaeU3Tt-lkp@intel.com/


Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>