cifs: Fix oops in session setup code for null user mounts
cifs: Fix oops in session setup code for null user mounts

For null user mounts, do not invoke string length function
during session setup.

Cc: <stable@kernel.org
Reported-and-Tested-by: Chris Clayton <9b914457bb759d41b751534c9c3099e6ed3abb24@googlemail.com>
Acked-by: Jeff Layton <4376fbf8623cd7b7c0232225289bb91cedc0a27f@redhat.com>
Signed-off-by: Shirish Pargaonkar <a054b3e50100c3c57432475f65c6e22f189f7975@gmail.com>
Signed-off-by: Steve French <51565b4e5841e493fd669866e11ea3c7c0d781cc@gmail.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas