Bluetooth: Fix crash in the Marvell driver initialization codepath
btmrvl_add_card() function calls kthread_run that might return error
(e.g. if current thread is killed). If one tries to use the error
value as a pointer then invalid memory access oops happens.
Check kthread_run() return value, if it is an error then release resources
correctly.
TEST=boot computer with BT modules enabled. I see the error message that
BT device initialization failed. Now kernel does not crash. Hint: to enable
BT run 'rmmod btmrvl_sdio; modprobe btmrvl_sdio'
Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c
index bae8e6a..1d7db20 100644
--- a/drivers/bluetooth/btmrvl_main.c
+++ b/drivers/bluetooth/btmrvl_main.c
@@ -710,12 +710,17 @@
init_waitqueue_head(&priv->main_thread.wait_q);
priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
&priv->main_thread, "btmrvl_main_service");
+ if (IS_ERR(priv->main_thread.task))
+ goto err_thread;
priv->btmrvl_dev.card = card;
priv->btmrvl_dev.tx_dnld_rdy = true;
return priv;
+err_thread:
+ btmrvl_free_adapter(priv);
+
err_adapter:
kfree(priv);