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xhci: Fix null pointer dereference if xhci initialization fails

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commit c207e7c50f upstream.

If xhci initialization fails before the roothub bandwidth
domains (xhci->rh_bw[i]) are allocated it will oops when
trying to access rh_bw members in xhci_mem_cleanup().

Reported-by: Manuel Reimer <manuel.reimer@gmx.de>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathias Nyman
2014-09-11 13:55:48 +03:00
committed by Greg Kroah-Hartman
parent 84ef02bb77
commit 7aeede98bd
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/host/xhci-mem.c
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@@ -1795,7 +1795,7 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
}
num_ports = HCS_MAX_PORTS(xhci->hcs_params1);
for (i = 0; i < num_ports; i++) {
for (i = 0; i < num_ports && xhci->rh_bw; i++) {
struct xhci_interval_bw_table *bwt = &xhci->rh_bw[i].bw_table;
for (j = 0; j < XHCI_MAX_INTERVAL; j++) {
struct list_head *ep = &bwt->interval_bw[j].endpoints;