5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dmitry Antipov <dmantipov@xxxxxxxxx>
[ Upstream commit 0e735a4c6137262bcefe45bb52fde7b1f5fc6c4d ]
In 'rtw_wait_firmware_completion()', always wait for both (regular and
wowlan) firmware loading attempts. Otherwise if 'rtw_usb_intf_init()'
has failed in 'rtw_usb_probe()', 'rtw_usb_disconnect()' may issue
'ieee80211_free_hw()' when one of 'rtw_load_firmware_cb()' (usually
the wowlan one) is still in progress, causing UAF detected by KASAN.
Fixes: c8e5695eae99 ("rtw88: load wowlan firmware if wowlan is supported")
Reported-by: syzbot+6c6c08700f9480c41fe3@xxxxxxxxxxxxxxxxxxxxxxxxx
Closes: https://syzkaller.appspot.com/bug?extid=6c6c08700f9480c41fe3
Signed-off-by: Dmitry Antipov <dmantipov@xxxxxxxxx>
Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
Link: https://patch.msgid.link/20240726114657.25396-1-dmantipov@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/wireless/realtek/rtw88/main.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index d7b7b2cce9746..23971a5737cf5 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -1153,20 +1153,21 @@ static int rtw_wait_firmware_completion(struct rtw_dev *rtwdev)
{
struct rtw_chip_info *chip = rtwdev->chip;
struct rtw_fw_state *fw;
+ int ret = 0;
fw = &rtwdev->fw;
wait_for_completion(&fw->completion);
if (!fw->firmware)
- return -EINVAL;
+ ret = -EINVAL;
if (chip->wow_fw_name) {
fw = &rtwdev->wow_fw;
wait_for_completion(&fw->completion);
if (!fw->firmware)
- return -EINVAL;
+ ret = -EINVAL;
}
- return 0;
+ return ret;
}
static enum rtw_lps_deep_mode rtw_update_lps_deep_mode(struct rtw_dev *rtwdev,
--
2.43.0
