[PATCH] Net/Usb:Fix realtek wireless NIC non-canonical address access issues

[WeitaoWangoc]

During realtek USB wireless NIC initialization, it's unexpected
disconnection will cause urb sumbmit fail.On the one hand,
_rtl_usb_cleanup_rx will be called to clean up rx stuff, especially
for rtl_wq. On the other hand, disconnection will cause rtl_usb_disconnect
and _rtl_usb_cleanup_rx to be called.Finnally,rtl_wq will be flush/destroy
twice,which will cause non-canonical address 0xdead000000000122 access and
general protection fault.

Fixed this issue by remove _rtl_usb_cleanup_rx when urb sumbmit fail.

Signed-off-by: WeitaoWangoc <WeitaoWang-oc@xxxxxxxxxxx>
---
 drivers/net/wireless/realtek/rtlwifi/usb.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/usb.c b/drivers/net/wireless/realtek/rtlwifi/usb.c
index 06e073d..d62b87f 100644
--- a/drivers/net/wireless/realtek/rtlwifi/usb.c
+++ b/drivers/net/wireless/realtek/rtlwifi/usb.c
@@ -731,7 +731,6 @@ static int _rtl_usb_receive(struct ieee80211_hw *hw)
 
 err_out:
 	usb_kill_anchored_urbs(&rtlusb->rx_submitted);
-	_rtl_usb_cleanup_rx(hw);
 	return err;
 }
 
-- 
2.7.4