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usb: xhci: fix wild pointers in xhci_mem_cleanup 

This patch fixes some wild pointers produced by xhci_mem_cleanup.
These wild pointers will cause system crash if xhci_mem_cleanup()
is called twice.

Reported-and-tested-by: Pengcheng Li <lpc.li@hisilicon.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lu Baolu 2016-04-08 16:25:09 +03:00 committed by Greg Kroah-Hartman
parent 5ad3b03e49
commit 71504062a7
1 changed files with 6 additions and 0 deletions
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6
drivers/usb/host/xhci-mem.c
View File

@ -1861,6 +1861,12 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
kfree(xhci->rh_bw);
kfree(xhci->ext_caps);
xhci->usb2_ports = NULL;
xhci->usb3_ports = NULL;
xhci->port_array = NULL;
xhci->rh_bw = NULL;
xhci->ext_caps = NULL;
xhci->page_size = 0;
xhci->page_shift = 0;
xhci->bus_state[0].bus_suspended = 0;