6.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
commit 290564367ab7fa7e2048bdc00d9c0ad016b41eea upstream.
After rtw_usb_alloc_rx_bufs() has been called rx urbs have been
allocated and must be freed in the error path. After rtw_usb_init_rx()
has been called they are submitted, so they also must be killed.
Add these forgotten steps to the probe error path.
Besides the lost memory this also fixes a problem when the driver
fails to download the firmware in rtw_chip_info_setup(). In this
case it can happen that the completion of the rx urbs handler runs
at a time when we already freed our data structures resulting in
a kernel crash.
Fixes: a82dfd33d123 ("wifi: rtw88: Add common USB chip support")
Cc: stable@xxxxxxxxxxxxxxx
Reported-by: Ilgaz Öcal <ilgaz@xxxxxxxxxxxx>
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Acked-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
Acked-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230823075021.588596-1-s.hauer@xxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/realtek/rtw88/usb.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/net/wireless/realtek/rtw88/usb.c
+++ b/drivers/net/wireless/realtek/rtw88/usb.c
@@ -837,7 +837,7 @@ int rtw_usb_probe(struct usb_interface *
ret = rtw_core_init(rtwdev);
if (ret)
- goto err_release_hw;
+ goto err_free_rx_bufs;
ret = rtw_usb_intf_init(rtwdev, intf);
if (ret) {
@@ -883,6 +883,9 @@ err_destroy_usb:
err_deinit_core:
rtw_core_deinit(rtwdev);
+err_free_rx_bufs:
+ rtw_usb_free_rx_bufs(rtwusb);
+
err_release_hw:
ieee80211_free_hw(hw);
