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authorKevin Cernekee <cernekee@gmail.com>2009-09-19 15:18:21 +0400
committerDavid S. Miller <davem@davemloft.net>2009-09-23 01:00:07 +0400
commit051b982bcc620695de629d29c333c95b66e9b95e (patch)
tree907229a896c19440e0a046b54fd6823a75ccabee /drivers/net/usb/kaweth.c
parent6f41d12bab6e5ce317b0494f5b3cd0b60e14ebc3 (diff)
downloadlinux-051b982bcc620695de629d29c333c95b66e9b95e.tar.xz
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.c18
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;
}
/****************************************************************