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| author | Jeffy Chen <jeffy.chen@rock-chips.com> | 2017-07-20 18:53:50 +0800 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2017-07-24 18:55:14 +0200 |
| commit | 19cfe912c37bbc184c673c3c081edff62ea8e565 (patch) | |
| tree | 52d9ff9a8da6dc305bd771f18c1b5e344d1ffabf /drivers/bluetooth | |
| parent | d98422cb6619408f1779457fefc5da983fc6bc3b (diff) | |
| download | linux-19cfe912c37bbc184c673c3c081edff62ea8e565.tar.bz2 | |
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:
[<ffffffc00034a9a8>] __save_stack_trace+0x48/0x6c
[<ffffffc00034b088>] create_object+0x138/0x254
[<ffffffc0009d5504>] kmemleak_alloc+0x58/0x8c
[<ffffffc000345f78>] __kmalloc+0x1d4/0x2a0
[<ffffffc0006765bc>] usb_alloc_urb+0x30/0x60
[<ffffffbffc128598>] alloc_ctrl_urb+0x38/0x120 [btusb]
[<ffffffbffc129e7c>] 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 <jeffy.chen@rock-chips.com>
Reviewed-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/btusb.c | 19 |
1 files changed, 17 insertions, 2 deletions
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) |