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Bluetooth: Fix potential NULL dereference

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The bnep_get_device function may be triggered by an ioctl just after a
connection has gone down. In such a case the respective L2CAP chan->conn
pointer will get set to NULL (by l2cap_chan_del). This patch adds a
missing NULL check for this case in the bnep_get_device() function.

Reported-by: Patrik Flykt <[email protected]>
Signed-off-by: Johan Hedberg <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
This commit is contained in:
Johan Hedberg 2015-02-03 10:01:13 +02:00 • committed by Marcel Holtmann
commit 88d9077c27
1 changed files with 3 additions and 4 deletions
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7
net/bluetooth/bnep/core.c
View file

@ -511,13 +511,12 @@ static int bnep_session(void *arg)
static struct device *bnep_get_device(struct bnep_session *session)
{
struct hci_conn *conn;
struct l2cap_conn *conn = l2cap_pi(session->sock->sk)->chan->conn;
conn = l2cap_pi(session->sock->sk)->chan->conn->hcon;
if (!conn)
if (!conn || !conn->hcon)
return NULL;
return &conn->dev;
return &conn->hcon->dev;
}
static struct device_type bnep_type = {