| Message ID | 1603193939-3458-1-git-send-email-WeitaoWang-oc@zhaoxin.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | Net/Usb:Fix realtek wireless NIC non-canonical address access issues | expand |
On Tue, 2020-10-20 at 19:38 +0800, WeitaoWangoc wrote: For rtlwifi driver, please use 'rtlwifi: ' as prefix of mail subject, like "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, nit: add space right after period, like "... 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@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 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; > } >
On Tue, 2020-10-27 at 09:39 +0800, Pkshih Wrote: >On Tue, 2020-10-20 at 19:38 +0800, WeitaoWangoc wrote: >For rtlwifi driver, please use 'rtlwifi: ' as prefix of mail subject, like >"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, >nit: add space right after period, like "... fail. On the one hand ..." Thanks for Your suggestion, I will resend this mail. Weitaowang Thanks
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; }
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@zhaoxin.com> --- drivers/net/wireless/realtek/rtlwifi/usb.c | 1 - 1 file changed, 1 deletion(-)