On 25-03-16 13:26:54, Fedor Pchelkin wrote:

usbmisc is an optional device property so it is totally valid for the corresponding data->usbmisc_data to have a NULL value.

Check that before dereferencing the pointer.

Found by Linux Verification Center (linuxtesting.org) with Svace static analysis tool.

Fixes: 74adad500346 ("usb: chipidea: ci_hdrc_imx: decrement device's refcount in .remove() and in the error path of .probe()") Cc: stable@vger.kernel.org Signed-off-by: Fedor Pchelkin pchelkin@ispras.ru

Acked-by: Peter Chen peter.chen@kernel.org

Peter

---

drivers/usb/chipidea/ci_hdrc_imx.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c index 1a7fc638213e..619779eef333 100644 --- a/drivers/usb/chipidea/ci_hdrc_imx.c +++ b/drivers/usb/chipidea/ci_hdrc_imx.c @@ -534,7 +534,8 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev) cpu_latency_qos_remove_request(&data->pm_qos_req); data->ci_pdev = NULL; err_put:

• put_device(data->usbmisc_data->dev);

• if (data->usbmisc_data)

• put_device(data->usbmisc_data->dev);
  

  return ret;

} @@ -559,7 +560,8 @@ static void ci_hdrc_imx_remove(struct platform_device *pdev) if (data->hsic_pad_regulator) regulator_disable(data->hsic_pad_regulator); }

• put_device(data->usbmisc_data->dev);

• if (data->usbmisc_data)

• put_device(data->usbmisc_data->dev);
  

} static void ci_hdrc_imx_shutdown(struct platform_device *pdev) -- 2.48.1