| From | Kamal Mostafa <> | Subject | [PATCH 3.19.y-ckt 33/66] usb: xhci: fix wild pointers in xhci_mem_cleanup | Date | Tue, 26 Apr 2016 13:24:24 -0700 |
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3.19.8-ckt20 -stable review patch. If anyone has any objections, please let me know.
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From: Lu Baolu <baolu.lu@linux.intel.com>
commit 71504062a7c34838c3fccd92c447f399d3cb5797 upstream.
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> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/usb/host/xhci-mem.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 4d45551..00e9527 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1882,6 +1882,12 @@ no_bw: 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; -- 2.7.4
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