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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2013-09-05 01:46:09 +0400
committerMarc Kleine-Budde <mkl@pengutronix.de>2013-09-20 20:58:21 +0200
commitf37d6e701f2a3a04e66690397340a6417f6e053f (patch)
tree39f29ad50fc76d1384ccf71859035084aa983c6a
parentdcb30e659287a6b40dafed1362532da42ec27229 (diff)
can: pcan_usb_core: fix memory leak on failure paths in peak_usb_start()
Tx and rx urbs are not deallocated if something goes wrong in peak_usb_start(). The patch fixes error handling to deallocate all the resources. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Acked-by: Stephane Grosjean <s.grosjean@peak-system.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
-rw-r--r--drivers/net/can/usb/peak_usb/pcan_usb_core.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.c b/drivers/net/can/usb/peak_usb/pcan_usb_core.c
index a0f647f..0b7a4c3 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_core.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.c
@@ -463,7 +463,7 @@ static int peak_usb_start(struct peak_usb_device *dev)
if (i < PCAN_USB_MAX_TX_URBS) {
if (i == 0) {
netdev_err(netdev, "couldn't setup any tx URB\n");
- return err;
+ goto err_tx;
}
netdev_warn(netdev, "tx performance may be slow\n");
@@ -472,7 +472,7 @@ static int peak_usb_start(struct peak_usb_device *dev)
if (dev->adapter->dev_start) {
err = dev->adapter->dev_start(dev);
if (err)
- goto failed;
+ goto err_adapter;
}
dev->state |= PCAN_USB_STATE_STARTED;
@@ -481,19 +481,26 @@ static int peak_usb_start(struct peak_usb_device *dev)
if (dev->adapter->dev_set_bus) {
err = dev->adapter->dev_set_bus(dev, 1);
if (err)
- goto failed;
+ goto err_adapter;
}
dev->can.state = CAN_STATE_ERROR_ACTIVE;
return 0;
-failed:
+err_adapter:
if (err == -ENODEV)
netif_device_detach(dev->netdev);
netdev_warn(netdev, "couldn't submit control: %d\n", err);
+ for (i = 0; i < PCAN_USB_MAX_TX_URBS; i++) {
+ usb_free_urb(dev->tx_contexts[i].urb);
+ dev->tx_contexts[i].urb = NULL;
+ }
+err_tx:
+ usb_kill_anchored_urbs(&dev->rx_submitted);
+
return err;
}