Re: [PATCH net] net: lapb: Decrease the refcount of "struct lapb_cb" in lapb_device_event

From: Martin Schiller
Date: Wed Jan 06 2021 - 02:37:31 EST


On 2020-12-31 18:43, Xie He wrote:
In lapb_device_event, lapb_devtostruct is called to get a reference to
an object of "struct lapb_cb". lapb_devtostruct increases the refcount
of the object and returns a pointer to it. However, we didn't decrease
the refcount after we finished using the pointer. This patch fixes this
problem.

Fixes: a4989fa91110 ("net/lapb: support netdev events")
Cc: Martin Schiller <ms@xxxxxxxxxx>
Signed-off-by: Xie He <xie.he.0141@xxxxxxxxx>
---
net/lapb/lapb_iface.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/net/lapb/lapb_iface.c b/net/lapb/lapb_iface.c
index 213ea7abc9ab..40961889e9c0 100644
--- a/net/lapb/lapb_iface.c
+++ b/net/lapb/lapb_iface.c
@@ -489,6 +489,7 @@ static int lapb_device_event(struct notifier_block
*this, unsigned long event,
break;
}

+ lapb_put(lapb);
return NOTIFY_DONE;
}

Well, I guess I missed that one. Thank you!

Acked-by: Martin Schiller <ms@xxxxxxxxxx>