From: Jeffy Chen Date: Thu, 20 Jul 2017 10:53:50 +0000 (+0800) Subject: Bluetooth: btusb: Fix memory leak in play_deferred X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=19cfe912c37bbc184c673c3c081edff62ea8e565;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git Bluetooth: btusb: Fix memory leak in play_deferred Currently we are calling usb_submit_urb directly to submit deferred tx urbs after unanchor them. So the usb_giveback_urb_bh would failed to unref it in usb_unanchor_urb and cause memory leak: unreferenced object 0xffffffc0ce0fa400 (size 256): ... backtrace: [] __save_stack_trace+0x48/0x6c [] create_object+0x138/0x254 [] kmemleak_alloc+0x58/0x8c [] __kmalloc+0x1d4/0x2a0 [] usb_alloc_urb+0x30/0x60 [] alloc_ctrl_urb+0x38/0x120 [btusb] [] btusb_send_frame+0x64/0xf8 [btusb] Put those urbs in tx_anchor to avoid the leak, and also fix the error handling. Signed-off-by: Jeffy Chen Reviewed-by: Oliver Neukum Signed-off-by: Marcel Holtmann --- diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 154237c78119..1cefff772cd0 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -3271,13 +3271,28 @@ static void play_deferred(struct btusb_data *data) int err; while ((urb = usb_get_from_anchor(&data->deferred))) { + usb_anchor_urb(urb, &data->tx_anchor); + err = usb_submit_urb(urb, GFP_ATOMIC); - if (err < 0) + if (err < 0) { + if (err != -EPERM && err != -ENODEV) + BT_ERR("%s urb %p submission failed (%d)", + data->hdev->name, urb, -err); + kfree(urb->setup_packet); + usb_unanchor_urb(urb); + usb_free_urb(urb); break; + } data->tx_in_flight++; + usb_free_urb(urb); + } + + /* Cleanup the rest deferred urbs. */ + while ((urb = usb_get_from_anchor(&data->deferred))) { + kfree(urb->setup_packet); + usb_free_urb(urb); } - usb_scuttle_anchored_urbs(&data->deferred); } static int btusb_resume(struct usb_interface *intf)