This is a note to let you know that I've just added the patch titled
wifi: rtl8xxxu: add cancel_work_sync() for c2hcmd_work
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-rtl8xxxu-add-cancel_work_sync-for-c2hcmd_work.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1af25ce23af446774cb66dd3dcb24ff035f157ac
Author: Martin Kaistra <martin.kaistra@xxxxxxxxxxxxx>
Date: Thu Jan 11 17:36:27 2024 +0100
wifi: rtl8xxxu: add cancel_work_sync() for c2hcmd_work
[ 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@xxxxxxxxxxxxx>
Reviewed-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://msgid.link/20240111163628.320697-2-martin.kaistra@xxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
index 30d9a195c6fb5..3536b9f8470f4 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -6484,6 +6484,7 @@ 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);
