xhci: Fix list corruption in urb dequeue at host removal
authorMathias Nyman <mathias.nyman@linux.intel.com>
Tue, 26 Jan 2016 15:50:12 +0000 (17:50 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 3 Feb 2016 22:01:47 +0000 (14:01 -0800)
commit5c82171167adb8e4ac77b91a42cd49fb211a81a0
tree916bb8042a5427c17a01c63f13a4a08c1a5c5782
parent2ad294d5f9d13d108c1e2f1a4be8542859ead134
xhci: Fix list corruption in urb dequeue at host removal

xhci driver frees data for all devices, both usb2 and and usb3 the
first time usb_remove_hcd() is called, including td_list and and xhci_ring
structures.

When usb_remove_hcd() is called a second time for the second xhci bus it
will try to dequeue all pending urbs, and touches td_list which is already
freed for that endpoint.

Cc: <stable@vger.kernel.org>
Reported-by: Joe Lawrence <joe.lawrence@stratus.com>
Tested-by: Joe Lawrence <joe.lawrence@stratus.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/xhci.c