Patch "usb: xhci: fix wild pointers in xhci_mem_cleanup" has been added to the 4.4-stable tree

Patch "usb: xhci: fix wild pointers in xhci_mem_cleanup" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    usb: xhci: fix wild pointers in xhci_mem_cleanup

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     usb-xhci-fix-wild-pointers-in-xhci_mem_cleanup.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 71504062a7c34838c3fccd92c447f399d3cb5797 Mon Sep 17 00:00:00 2001
From: Lu Baolu <baolu.lu@linux.intel.com>
Date: Fri, 8 Apr 2016 16:25:09 +0300
Subject: usb: xhci: fix wild pointers in xhci_mem_cleanup

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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/host/xhci-mem.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1875,6 +1875,12 @@ 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;


Patches currently in stable-queue which might be from baolu.lu@linux.intel.com are

queue-4.4/usb-xhci-fix-wild-pointers-in-xhci_mem_cleanup.patch