Patch "xhci: Fix null pointer dereference if xhci initialization fails" has been added to the 3.14-stable tree

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

    xhci: Fix null pointer dereference if xhci initialization fails

to the 3.14-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:
     xhci-fix-null-pointer-dereference-if-xhci-initialization-fails.patch
and it can be found in the queue-3.14 subdirectory.

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


>From c207e7c50f31113c24a9f536fcab1e8a256985d7 Mon Sep 17 00:00:00 2001
From: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Date: Thu, 11 Sep 2014 13:55:48 +0300
Subject: xhci: Fix null pointer dereference if xhci initialization fails

From: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>

commit c207e7c50f31113c24a9f536fcab1e8a256985d7 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@xxxxxx>
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/usb/host/xhci-mem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1723,7 +1723,7 @@ void xhci_mem_cleanup(struct xhci_hcd *x
 	}
 
 	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;


Patches currently in stable-queue which might be from mathias.nyman@xxxxxxxxxxxxxxx are

queue-3.14/usb-host-xhci-fix-compliance-mode-workaround.patch
queue-3.14/xhci-fix-null-pointer-dereference-if-xhci-initialization-fails.patch
queue-3.14/xhci-fix-oops-when-xhci-resumes-from-hibernate-with-hw-lpm-capable-devices.patch
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