Shyam Prasad N 30aae98b75
cifs: do not depend on release_iface for maintaining iface_list ...
commit 09eeb0723f219fbd96d8865bf9b935e03ee2ec22 upstream.
parse_server_interfaces should be in complete charge of maintaining
the iface_list linked list. Today, iface entries are removed
from the list only when the last refcount is dropped.
i.e. in release_iface. However, this can result in undercounting
of refcount if the server stops advertising interfaces (which
Azure SMB server does).
This change puts parse_server_interfaces in full charge of
maintaining the iface_list. So if an empty list is returned
by the server, the entries in the list will immediately be
removed. This way, a following call to the same function will
not find entries in the list.
Fixes: aa45dadd34stable@vger.kernel.org
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com >
Signed-off-by: Steve French <stfrench@microsoft.com >
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
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30aae98b75