From: Paul Zimmerman <Paul.Zimmerman@synopsys.com>
Date: Mon, 23 Sep 2013 21:23:33 +0000 (-0700)
Subject: staging: dwc2: validate urb->actual_length for OUT endpoints
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=84181086342615a8c6cb28901fd8d67939b3c903;p=openwrt%2Fstaging%2Fblogic.git

staging: dwc2: validate urb->actual_length for OUT endpoints

In dwc2_assign_and_init_hc(), validate urb->actual_length for OUT
endpoints before using the value. This fix is from the Synopsys
vendor driver.

Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/dwc2/hcd.c b/drivers/staging/dwc2/hcd.c
index da0d35cc33ce..b24540572e92 100644
--- a/drivers/staging/dwc2/hcd.c
+++ b/drivers/staging/dwc2/hcd.c
@@ -780,6 +780,10 @@ static void dwc2_assign_and_init_hc(struct dwc2_hsotg *hsotg,
 	chan->data_pid_start = qh->data_toggle;
 	chan->multi_count = 1;
 
+	if ((urb->actual_length < 0 || urb->actual_length > urb->length) &&
+	    !dwc2_hcd_is_pipe_in(&urb->pipe_info))
+		urb->actual_length = urb->length;
+
 	if (hsotg->core_params->dma_enable > 0) {
 		chan->xfer_dma = urb->dma + urb->actual_length;