Re: [PATCH v2] net/x25: Fix x25_neigh refcnt leak when x25 disconnect

[David Miller]

From: Xiyu Yang <xiyuyang19@xxxxxxxxxxxx>
Date: Sat, 25 Apr 2020 21:06:25 +0800

> x25_connect() invokes x25_get_neigh(), which returns a reference of the
> specified x25_neigh object to "x25->neighbour" with increased refcnt.
> 
> When x25 connect success and returns, the reference still be hold by
> "x25->neighbour", so the refcount should be decreased in
> x25_disconnect() to keep refcount balanced.
> 
> The reference counting issue happens in x25_disconnect(), which forgets
> to decrease the refcnt increased by x25_get_neigh() in x25_connect(),
> causing a refcnt leak.
> 
> Fix this issue by calling x25_neigh_put() before x25_disconnect()
> returns.
> 
> Signed-off-by: Xiyu Yang <xiyuyang19@xxxxxxxxxxxx>
> Signed-off-by: Xin Tan <tanxin.ctf@xxxxxxxxx>

Applied.