queue-4.4/usb-gadget-composite-fix-dereference-after-null-check-coverify-warning.patch

   1 From c526c62d565ea5a5bba9433f28756079734f430d Mon Sep 17 00:00:00 2001
   2 From: Peter Chen <peter.chen@nxp.com>
   3 Date: Fri, 1 Jul 2016 15:33:28 +0800
   4 Subject: usb: gadget: composite: fix dereference after null check coverify warning
   5
   6 From: Peter Chen <peter.chen@nxp.com>
   7
   8 commit c526c62d565ea5a5bba9433f28756079734f430d upstream.
   9
  10 cdev->config is checked for null pointer at above code, so cdev->config
  11 might be null, fix it by adding null pointer check.
  12
  13 Signed-off-by: Peter Chen <peter.chen@nxp.com>
  14 Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
  15 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
  16 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  17
  18 ---
  19  drivers/usb/gadget/composite.c |    2 ++
  20  1 file changed, 2 insertions(+)
  21
  22 --- a/drivers/usb/gadget/composite.c
  23 +++ b/drivers/usb/gadget/composite.c
  24 @@ -1819,6 +1819,8 @@ unknown:
  25                         break;
  26
  27                 case USB_RECIP_ENDPOINT:
  28 +                       if (!cdev->config)
  29 +                               break;
  30                         endp = ((w_index & 0x80) >> 3) | (w_index & 0x0f);
  31                         list_for_each_entry(f, &cdev->config->functions, list) {
  32                                 if (test_bit(endp, f->endpoints))