When adding conn, it is necessary to increase and retain the conn reference
count at the same time.
Another problem was fixed along the way, conn_put is missing when hcon is NULL
in the timeout routine.
Fixes: e6720779ae61 ("Bluetooth: SCO: Use kref to track lifetime of sco_conn")
Reported-and-tested-by: syzbot+489f78df4709ac2bfdd3@xxxxxxxxxxxxxxxxxxxxxxxxx
Closes: https://syzkaller.appspot.com/bug?extid=489f78df4709ac2bfdd3
Signed-off-by: Edward Adam Davis <eadavis@xxxxxx>
---
net/bluetooth/sco.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 1b8e468d24cf..78f7bca24487 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -143,6 +143,7 @@ static void sco_sock_timeout(struct work_struct *work)
sco_conn_lock(conn);
if (!conn->hcon) {
sco_conn_unlock(conn);
+ sco_conn_put(conn);
return;
}
sk = sco_sock_hold(conn);
@@ -192,7 +193,6 @@ static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
conn->hcon = hcon;
sco_conn_unlock(conn);
}
- sco_conn_put(conn);
return conn;
}
--
2.43.0
