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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2013-09-13 00:51:20 +0400
committerDavid S. Miller <davem@davemloft.net>2013-09-12 23:43:56 -0400
commit8947312987e3d8b3457452c27d3bdacde9984f47 (patch)
tree02a4b6c87c06ca57ec787527f3a08febefc1ae38
parent38463e2c290426262cd9a75fe66cbbe2925a68c2 (diff)
net/irda/mcs7780: fix memory leaks in mcs_net_open()
If rx_urb allocation fails in mcs_setup_urbs(), tx_urb leaks. If mcs_receive_start() fails in mcs_net_open(), the both urbs are not deallocated. The patch fixes the issues and by the way fixes label indentation. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/irda/mcs7780.c40
1 files changed, 23 insertions, 17 deletions
diff --git a/drivers/net/irda/mcs7780.c b/drivers/net/irda/mcs7780.c
index f07c340..3f138ca 100644
--- a/drivers/net/irda/mcs7780.c
+++ b/drivers/net/irda/mcs7780.c
@@ -191,8 +191,8 @@ static inline int mcs_setup_transceiver_vishay(struct mcs_cb *mcs)
goto error;
ret = 0;
- error:
- return ret;
+error:
+ return ret;
}
/* Setup a communication between mcs7780 and agilent chip. */
@@ -501,8 +501,11 @@ static inline int mcs_setup_urbs(struct mcs_cb *mcs)
return 0;
mcs->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!mcs->rx_urb)
+ if (!mcs->rx_urb) {
+ usb_free_urb(mcs->tx_urb);
+ mcs->tx_urb = NULL;
return 0;
+ }
return 1;
}
@@ -643,9 +646,9 @@ static int mcs_speed_change(struct mcs_cb *mcs)
ret = mcs_set_reg(mcs, MCS_MODE_REG, rval);
mcs->speed = mcs->new_speed;
- error:
- mcs->new_speed = 0;
- return ret;
+error:
+ mcs->new_speed = 0;
+ return ret;
}
/* Ioctl calls not supported at this time. Can be an area of future work. */
@@ -738,17 +741,20 @@ static int mcs_net_open(struct net_device *netdev)
ret = mcs_receive_start(mcs);
if (ret)
- goto error3;
+ goto error4;
netif_start_queue(netdev);
return 0;
- error3:
- irlap_close(mcs->irlap);
- error2:
- kfree_skb(mcs->rx_buff.skb);
- error1:
- return ret;
+error4:
+ usb_free_urb(mcs->rx_urb);
+ usb_free_urb(mcs->tx_urb);
+error3:
+ irlap_close(mcs->irlap);
+error2:
+ kfree_skb(mcs->rx_buff.skb);
+error1:
+ return ret;
}
/* Receive callback function. */
@@ -946,11 +952,11 @@ static int mcs_probe(struct usb_interface *intf,
usb_set_intfdata(intf, mcs);
return 0;
- error2:
- free_netdev(ndev);
+error2:
+ free_netdev(ndev);
- error1:
- return ret;
+error1:
+ return ret;
}
/* The current device is removed, the USB layer tells us to shut down. */