xhci: check port array allocation was successful before dereferencing it

return if rhub->ports is null after rhub->ports = kcalloc_node()
Klockwork reported issue

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20210406070208.3406266-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 34d95c0..f66815f 100644 (file)
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -2249,6 +2249,9 @@ static void xhci_create_rhub_port_array(struct xhci_hcd *xhci,
                return;
        rhub->ports = kcalloc_node(rhub->num_ports, sizeof(*rhub->ports),
                        flags, dev_to_node(dev));
+       if (!rhub->ports)
+               return;
+
        for (i = 0; i < HCS_MAX_PORTS(xhci->hcs_params1); i++) {
                if (xhci->hw_ports[i].rhub != rhub ||
                    xhci->hw_ports[i].hcd_portnum == DUPLICATE_ENTRY)