From: Dan Carpenter Date: Wed, 20 May 2026 05:59:28 +0000 (+0300) Subject: usb: dwc2: Fix use after free in debug code X-Git-Tag: v7.1-rc6~9^2~2 X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=9ea06a3fbf9f16e0d98c52cb3b99642be15ec281;p=thirdparty%2Fkernel%2Flinux.git usb: dwc2: Fix use after free in debug code We're not allowed to dereference "urb" after calling usb_hcd_giveback_urb() so save the urb->status ahead of time. Fixes: 7359d482eb4d ("staging: HCD files for the DWC2 driver") Cc: stable Signed-off-by: Dan Carpenter Link: https://patch.msgid.link/ag1NwBpqT4IEQcdJ@stanley.mountain Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 1a763ad4f721..2414291aa908 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -4804,6 +4804,7 @@ static int _dwc2_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); int rc; unsigned long flags; + int urb_status; dev_dbg(hsotg->dev, "DWC OTG HCD URB Dequeue\n"); dwc2_dump_urb_info(hcd, urb, "urb_dequeue"); @@ -4828,11 +4829,12 @@ static int _dwc2_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, /* Higher layer software sets URB status */ spin_unlock(&hsotg->lock); + urb_status = urb->status; usb_hcd_giveback_urb(hcd, urb, status); spin_lock(&hsotg->lock); dev_dbg(hsotg->dev, "Called usb_hcd_giveback_urb()\n"); - dev_dbg(hsotg->dev, " urb->status = %d\n", urb->status); + dev_dbg(hsotg->dev, " urb->status = %d\n", urb_status); out: spin_unlock_irqrestore(&hsotg->lock, flags);