From: Martin Kaistra martin.kaistra@linutronix.de

stable inclusion from stable-v5.10.214 commit dddedfa3b29a63c2ca4336663806a6128b8545b4 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9L9M3

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...

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[ Upstream commit 1213acb478a7181cd73eeaf00db430f1e45b1361 ]

The workqueue might still be running, when the driver is stopped. To avoid a use-after-free, call cancel_work_sync() in rtl8xxxu_stop().

Fixes: e542e66b7c2e ("rtl8xxxu: add bluetooth co-existence support for single antenna") Signed-off-by: Martin Kaistra martin.kaistra@linutronix.de Reviewed-by: Ping-Ke Shih pkshih@realtek.com Signed-off-by: Kalle Valo kvalo@kernel.org Link: https://msgid.link/20240111163628.320697-2-martin.kaistra@linutronix.de Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Wang Hai wanghai38@huawei.com --- drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c index e34cd6fed7e8..72bd674e82c6 100644 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c @@ -6494,6 +6494,7 @@ static void rtl8xxxu_stop(struct ieee80211_hw *hw) if (priv->usb_interrupts) rtl8xxxu_write32(priv, REG_USB_HIMR, 0);

+ cancel_work_sync(&priv->c2hcmd_work); cancel_delayed_work_sync(&priv->ra_watchdog);

rtl8xxxu_free_rx_resources(priv);