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Date: Tue, 27 Oct 2020 11:16:20 +0800 From: WeitaoWangoc <WeitaoWang-oc@...oxin.com> To: <pkshih@...ltek.com>, <kvalo@...eaurora.org>, <davem@...emloft.net>, <kuba@...nel.org>, <linux-wireless@...r.kernel.org>, <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org> CC: <tonywwang@...oxin.com>, <weitaowang@...oxin.com>, <CobeChen@...oxin.com>, <TimGuo@...oxin.com>, <wwt8723@....com> Subject: [PATCH] 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 <WeitaoWang-oc@...oxin.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 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
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