cifs: fix possible uninitialized access and race on iface_list
iface[0] was accessed regardless of the count value and without locking. * check count before accessing any ifaces * make copy of iface list (it's a simple POD array) and use it without locking. Signed-off-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
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