Re: [PATCH] rtl818x: fix potential use after free

entry is released via usb_put_urb just after calling usb_submit_urb.
However, entry is used if the submission fails, resulting in a use after
free bug. The patch fixes this.

Signed-off-by: Pan Bian <redacted>
---
  drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c | 3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c b/drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c
index cec3778..1a2ea8b 100644
--- a/drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c
+++ b/drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c

@@ -444,12 +444,13 @@ static int rtl8187_init_urbs(struct ieee80211_hw *dev)
  		skb_queue_tail(&priv->rx_queue, skb);
  		usb_anchor_urb(entry, &priv->anchored);
  		ret = usb_submit_urb(entry, GFP_KERNEL);
-		usb_put_urb(entry);
  		if (ret) {
  			skb_unlink(skb, &priv->rx_queue);
  			usb_unanchor_urb(entry);
+			usb_put_urb(entry);
  			goto err;
  		}
+		usb_put_urb(entry);
  	}
  	return ret;