From: Xiyu Yang xiyuyang19@fudan.edu.cn
[ Upstream commit 7717cbec172c3554d470023b4020d5781961187e ]
i2400mu_bus_bm_wait_for_ack() invokes usb_get_urb(), which increases the refcount of the "notif_urb".
When i2400mu_bus_bm_wait_for_ack() returns, local variable "notif_urb" becomes invalid, so the refcount should be decreased to keep refcount balanced.
The issue happens in all paths of i2400mu_bus_bm_wait_for_ack(), which forget to decrease the refcnt increased by usb_get_urb(), causing a refcnt leak.
Fix this issue by calling usb_put_urb() before the i2400mu_bus_bm_wait_for_ack() returns.
Signed-off-by: Xiyu Yang xiyuyang19@fudan.edu.cn Signed-off-by: Xin Tan tanxin.ctf@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wimax/i2400m/usb-fw.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/net/wimax/i2400m/usb-fw.c b/drivers/net/wimax/i2400m/usb-fw.c index 529ebca..1f7709d 100644 --- a/drivers/net/wimax/i2400m/usb-fw.c +++ b/drivers/net/wimax/i2400m/usb-fw.c @@ -354,6 +354,7 @@ ssize_t i2400mu_bus_bm_wait_for_ack(struct i2400m *i2400m, usb_autopm_put_interface(i2400mu->usb_iface); d_fnend(8, dev, "(i2400m %p ack %p size %zu) = %ld\n", i2400m, ack, ack_size, (long) result); + usb_put_urb(¬if_urb); return result;
error_exceeded: