cifs: fix regression when mounting shares with prefix paths
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.11.20 by commit e69ceb7d193d8af1d312880f33a52d7df3a413bf, it was introduced in version v5.11.20 by commit a69d17010f9c18b24ef6266a154b9a20d195d815. For more details please see the references link.