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xhci: Fix null pointer dereference if xhci initialization fails
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> Cc: stable <stable@vger.kernel.org> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 1 additions and 1 deletions
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@ -1819,7 +1819,7 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
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xhci_cleanup_command_queue(xhci);
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xhci_cleanup_command_queue(xhci);
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num_ports = HCS_MAX_PORTS(xhci->hcs_params1);
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num_ports = HCS_MAX_PORTS(xhci->hcs_params1);
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for (i = 0; i < num_ports; i++) {
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for (i = 0; i < num_ports && xhci->rh_bw; i++) {
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struct xhci_interval_bw_table *bwt = &xhci->rh_bw[i].bw_table;
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struct xhci_interval_bw_table *bwt = &xhci->rh_bw[i].bw_table;
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for (j = 0; j < XHCI_MAX_INTERVAL; j++) {
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for (j = 0; j < XHCI_MAX_INTERVAL; j++) {
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struct list_head *ep = &bwt->interval_bw[j].endpoints;
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struct list_head *ep = &bwt->interval_bw[j].endpoints;
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