From: Anatol Pomozov <[email protected]> 3.12-stable review patch. If anyone has any objections, please let me know.
=============== commit 8500d791c458ccbbb3e2d3fa9a0320ffd5729069 upstream. 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 <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]> Signed-off-by: Jiri Slaby <[email protected]> --- drivers/bluetooth/btmrvl_main.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c index 9a9f51875df5..5592b71f3dae 100644 --- a/drivers/bluetooth/btmrvl_main.c +++ b/drivers/bluetooth/btmrvl_main.c @@ -628,12 +628,17 @@ 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); -- 2.1.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
