5f2a0afa9890 ("smb: client: improve DFS mount check").

for v6.3.y.

And for v6.4.y, please take these

    d439b29057e2 ("smb: client: fix broken file attrs with nodfs mounts")
    49024ec8795e ("smb: client: fix parsing of source mount option")
    3ae872de4107 ("smb: client: fix shared DFS root mounts with different prefixes")
    49024ec8795e ("smb: client: fix parsing of source mount option")

Thanks.