From: Anatol Pomozov Date: Wed, 30 Jul 2014 22:57:03 +0000 (-0700) Subject: Bluetooth: Fix crash in the Marvell driver initialization codepath X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8500d791c458ccbbb3e2d3fa9a0320ffd5729069;p=linux-beck.git 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 Signed-off-by: Marcel Holtmann --- diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c index bae8e6a0ecf6..1d7db2064889 100644 --- a/drivers/bluetooth/btmrvl_main.c +++ b/drivers/bluetooth/btmrvl_main.c @@ -710,12 +710,17 @@ struct btmrvl_private *btmrvl_add_card(void *card) 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);