diff options
| author | Kevin Cernekee <cernekee@gmail.com> | 2009-09-19 11:18:21 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-09-22 14:00:07 -0700 |
| commit | 051b982bcc620695de629d29c333c95b66e9b95e (patch) | |
| tree | 907229a896c19440e0a046b54fd6823a75ccabee /drivers/net/usb/kaweth.c | |
| parent | 6f41d12bab6e5ce317b0494f5b3cd0b60e14ebc3 (diff) | |
| download | lwn-051b982bcc620695de629d29c333c95b66e9b95e.tar.gz lwn-051b982bcc620695de629d29c333c95b66e9b95e.zip | |
kaweth: Fix memory leak in kaweth_control()
kaweth_control() never frees the buffer that it allocates for the USB
control message. Test case:
while :; do ifconfig eth2 down ; ifconfig eth2 up ; done
This is a tiny buffer so it is a slow leak. If you want to speed up the
process, you can change the allocation size to e.g. 16384 bytes, and it
will consume several megabytes within a few minutes.
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Acked-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb/kaweth.c')
| -rw-r--r-- | drivers/net/usb/kaweth.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/net/usb/kaweth.c b/drivers/net/usb/kaweth.c index e2a39b9be96e..e391ef969c28 100644 --- a/drivers/net/usb/kaweth.c +++ b/drivers/net/usb/kaweth.c @@ -263,6 +263,7 @@ static int kaweth_control(struct kaweth_device *kaweth, int timeout) { struct usb_ctrlrequest *dr; + int retval; dbg("kaweth_control()"); @@ -278,18 +279,21 @@ static int kaweth_control(struct kaweth_device *kaweth, return -ENOMEM; } - dr->bRequestType= requesttype; + dr->bRequestType = requesttype; dr->bRequest = request; dr->wValue = cpu_to_le16(value); dr->wIndex = cpu_to_le16(index); dr->wLength = cpu_to_le16(size); - return kaweth_internal_control_msg(kaweth->dev, - pipe, - dr, - data, - size, - timeout); + retval = kaweth_internal_control_msg(kaweth->dev, + pipe, + dr, + data, + size, + timeout); + + kfree(dr); + return retval; } /**************************************************************** |