From c521d7e0ff05257bb9128ab7e68b8e2c084ed361 Mon Sep 17 00:00:00 2001 From: WeitaoWangoc Date: Tue, 27 Oct 2020 11:16:20 +0800 Subject: rtlwifi: Fix non-canonical address access issues 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. So, 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 Acked-by: Ping-Ke Shih Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/1603768580-2798-1-git-send-email-WeitaoWang-oc@zhaoxin.com --- 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 06e073defad6..d62b87f010c9 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; } -- cgit v1.2.3-59-g8ed1b