[PATCH] net: memory leak in nr_rx_frame

[Bragatheswaran Manickavel]

The condition (make = nr_make_new(sk)) == NULL suggests
that nr_make_new allocates memory and returns a pointer.
If this allocation fails (returns NULL), it indicates a
potential memory leak.

Added sock_put() for make which can potentially solve
this issue

Reported-by: syzbot+0145ea560de205bc09f0@xxxxxxxxxxxxxxxxxxxxxxxxx
Closes: https://syzkaller.appspot.com/bug?extid=0145ea560de205bc09f0
Signed-off-by: Bragatheswaran Manickavel <bragathemanick0908@xxxxxxxxx>
---
 net/netrom/af_netrom.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 0eed00184adf..7d7cda4ae300 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -970,6 +970,8 @@ int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
 		nr_transmit_refusal(skb, 0);
 		if (sk)
 			sock_put(sk);
+		if (make)
+			sock_put(make);
 		return 0;
 	}
 
-- 
2.34.1