[PATCH v3 1/2] staging: dwc2: validate urb->actual_length for OUT endpoints

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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@xxxxxxxxxxxx>
---
 drivers/staging/dwc2/hcd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/staging/dwc2/hcd.c b/drivers/staging/dwc2/hcd.c
index da0d35c..b245405 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;
 
-- 
1.8.2.rc0.16.g20a599e

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