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| author | Johan Hedberg <johan.hedberg@intel.com> | 2015-02-03 10:01:13 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2015-02-03 09:02:12 +0100 |
| commit | 88d9077c27d0c1a7c022d9dc987640beecf23560 (patch) | |
| tree | 0e72093db43abd243deaf2bdaf054262e7694feb /net/bluetooth/bnep | |
| parent | 8f0c304c693c5a9759ed6ae50d07d4590dad5ae7 (diff) | |
| download | linux-stable-88d9077c27d0c1a7c022d9dc987640beecf23560.tar.gz linux-stable-88d9077c27d0c1a7c022d9dc987640beecf23560.tar.bz2 linux-stable-88d9077c27d0c1a7c022d9dc987640beecf23560.zip | |
Bluetooth: Fix potential NULL dereference
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 <patrik.flykt@linux.intel.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth/bnep')
| -rw-r--r-- | net/bluetooth/bnep/core.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c index ce82722d049b..05f57e491ccb 100644 --- a/net/bluetooth/bnep/core.c +++ b/net/bluetooth/bnep/core.c @@ -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 = { |