# \[PATCH 4/7\] net/bluetooth/rfcomm/core.c: fix error return code

- From: Julia Lawall \<hidden\>
- Date: 2012-08-29 16:49:58 
- List: netdev
- Page: https://ratatoskr.run/netdev/2012/08/3915574
- Thread: https://ratatoskr.run/kernel-janitors/2012/08/3915555/t.md

```text
From: Julia Lawall <redacted>

Initialize return variable before exiting on an error path.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}

// </smpl>

Signed-off-by: Julia Lawall <redacted>

---
 net/bluetooth/rfcomm/core.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
index c75107e..30141c0 100644
--- a/net/bluetooth/rfcomm/core.c
+++ b/net/bluetooth/rfcomm/core.c
@@ -2010,8 +2010,10 @@ static int rfcomm_add_listener(bdaddr_t *ba)
 
 	/* Add listening session */
 	s = rfcomm_session_add(sock, BT_LISTEN);
-	if (!s)
+	if (!s) {
+		err = -ENOMEM;
 		goto failed;
+	}
 
 	rfcomm_session_hold(s);
 	return 0;
```