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authorDan Carpenter <error27@gmail.com>2010-04-27 03:20:12 +0400
committerDavid S. Miller <davem@davemloft.net>2010-04-28 01:49:07 +0400
commitd87ff58fda926fe5cb01214cccf1c72422ac776d (patch)
tree896ae06e804c24fd02b254896a884d2f5d30fe4a /drivers/net/usb/ipheth.c
parent2a9151572224ad5fe808058097be94106470a6dc (diff)
downloadlinux-d87ff58fda926fe5cb01214cccf1c72422ac776d.tar.xz
ipheth: potential null dereferences on error path
The calls to usb_free_buffer() dereference rx_urb and tx_urb in the parameter list but those could be NULL. Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: L. Alberto Giménez <agimenez@sysvalve.es> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb/ipheth.c')
-rw-r--r--drivers/net/usb/ipheth.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/net/usb/ipheth.c b/drivers/net/usb/ipheth.c
index fd1033130a81..418825d26f90 100644
--- a/drivers/net/usb/ipheth.c
+++ b/drivers/net/usb/ipheth.c
@@ -122,25 +122,25 @@ static int ipheth_alloc_urbs(struct ipheth_device *iphone)
tx_urb = usb_alloc_urb(0, GFP_KERNEL);
if (tx_urb == NULL)
- goto error;
+ goto error_nomem;
rx_urb = usb_alloc_urb(0, GFP_KERNEL);
if (rx_urb == NULL)
- goto error;
+ goto free_tx_urb;
tx_buf = usb_buffer_alloc(iphone->udev,
IPHETH_BUF_SIZE,
GFP_KERNEL,
&tx_urb->transfer_dma);
if (tx_buf == NULL)
- goto error;
+ goto free_rx_urb;
rx_buf = usb_buffer_alloc(iphone->udev,
IPHETH_BUF_SIZE,
GFP_KERNEL,
&rx_urb->transfer_dma);
if (rx_buf == NULL)
- goto error;
+ goto free_tx_buf;
iphone->tx_urb = tx_urb;
@@ -149,13 +149,14 @@ static int ipheth_alloc_urbs(struct ipheth_device *iphone)
iphone->rx_buf = rx_buf;
return 0;
-error:
- usb_buffer_free(iphone->udev, IPHETH_BUF_SIZE, rx_buf,
- rx_urb->transfer_dma);
+free_tx_buf:
usb_buffer_free(iphone->udev, IPHETH_BUF_SIZE, tx_buf,
tx_urb->transfer_dma);
+free_rx_urb:
usb_free_urb(rx_urb);
+free_tx_urb:
usb_free_urb(tx_urb);
+error_nomem:
return -ENOMEM;
}