6.1-stable review patch. If anyone has any objections, please let me know.
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From: Dmitry Antipov dmantipov@yandex.ru
[ 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@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=6c6c08700f9480c41fe3 Signed-off-by: Dmitry Antipov dmantipov@yandex.ru Signed-off-by: Ping-Ke Shih pkshih@realtek.com Link: https://patch.msgid.link/20240726114657.25396-1-dmantipov@yandex.ru Signed-off-by: Sasha Levin sashal@kernel.org --- 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 81f3112923f1c..4620a0d5c77b2 100644 --- a/drivers/net/wireless/realtek/rtw88/main.c +++ b/drivers/net/wireless/realtek/rtw88/main.c @@ -1286,20 +1286,21 @@ static int rtw_wait_firmware_completion(struct rtw_dev *rtwdev) { const 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,