Messages in this thread Patch in this message | | | From | Kevin Cernekee <> | Date | Sat, 19 Sep 2009 14:18:21 -0700 | Subject | [PATCH RESEND] kaweth: Fix memory leak in kaweth_control() |
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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> --- 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 e2a39b9..e391ef9 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; } /**************************************************************** -- 1.6.3.1
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