diff options
| author | Anderson Lizardo <anderson.lizardo@openbossa.org> | 2013-01-06 18:28:53 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-02-03 18:24:41 -0600 |
| commit | 5a6d60801c24f6966cf73894258134778ddccde5 (patch) | |
| tree | e2ec46e0454cd0815c65a17c83c3d3ba60a43561 | |
| parent | 99141c253f45822edfab14fa34bfa47f56d803ad (diff) | |
Bluetooth: Fix incorrect strncpy() in hidp_setup_hid()
commit 0a9ab9bdb3e891762553f667066190c1d22ad62b upstream.
The length parameter should be sizeof(req->name) - 1 because there is no
guarantee that string provided by userspace will contain the trailing
'\0'.
Can be easily reproduced by manually setting req->name to 128 non-zero
bytes prior to ioctl(HIDPCONNADD) and checking the device name setup on
input subsystem:
$ cat /sys/devices/pnp0/00\:04/tty/ttyS0/hci0/hci0\:1/input8/name
AAAAAA[...]AAAAAAAAf0:af:f0:af:f0:af
("f0:af:f0:af:f0:af" is the device bluetooth address, taken from "phys"
field in struct hid_device due to overflow.)
Signed-off-by: Anderson Lizardo <anderson.lizardo@openbossa.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/bluetooth/hidp/core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c index d478be11d562..7a0d9840866d 100644 --- a/net/bluetooth/hidp/core.c +++ b/net/bluetooth/hidp/core.c @@ -949,7 +949,7 @@ static int hidp_setup_hid(struct hidp_session *session, hid->version = req->version; hid->country = req->country; - strncpy(hid->name, req->name, 128); + strncpy(hid->name, req->name, sizeof(req->name) - 1); strncpy(hid->phys, batostr(&bt_sk(session->ctrl_sock->sk)->src), 64); strncpy(hid->uniq, batostr(&bt_sk(session->ctrl_sock->sk)->dst), 64); |