From: Nikhil Badola <nikhil.badola@xxxxxxxxxxxxx> Check memory resource existence before releasing it to avoid NULL pointer dereference Signed-off-by: Nikhil Badola <nikhil.badola@xxxxxxxxxxxxx> Reviewed-by: Ran Wang <ran.wang_1@xxxxxxx> Reviewed-by: Peter Chen <peter.chen@xxxxxxx> --- drivers/usb/gadget/udc/fsl_udc_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/udc/fsl_udc_core.c b/drivers/usb/gadget/udc/fsl_udc_core.c index 20141c3096f6..9a05863b2876 100644 --- a/drivers/usb/gadget/udc/fsl_udc_core.c +++ b/drivers/usb/gadget/udc/fsl_udc_core.c @@ -2576,7 +2576,7 @@ static int fsl_udc_remove(struct platform_device *pdev) dma_pool_destroy(udc_controller->td_pool); free_irq(udc_controller->irq, udc_controller); iounmap(dr_regs); - if (pdata->operating_mode == FSL_USB2_DR_DEVICE) + if (res && (pdata->operating_mode == FSL_USB2_DR_DEVICE)) release_mem_region(res->start, resource_size(res)); /* free udc --wait for the release() finished */ -- 2.17.1
