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| author | Anderson Lizardo <anderson.lizardo@openbossa.org> | 2013-01-07 02:28:53 +0400 |
|---|---|---|
| committer | Gustavo Padovan <gustavo.padovan@collabora.co.uk> | 2013-01-09 23:39:05 +0400 |
| commit | 0a9ab9bdb3e891762553f667066190c1d22ad62b (patch) | |
| tree | 1a576d1b736c6aba50cb3f7620f3a03de2261c15 /net/bluetooth | |
| parent | 2582d529c44d12502a700f1c3db062b9f44679bc (diff) | |
| download | linux-0a9ab9bdb3e891762553f667066190c1d22ad62b.tar.xz | |
Bluetooth: Fix incorrect strncpy() in hidp_setup_hid()
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.)
Cc: stable@vger.kernel.org
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>
Diffstat (limited to 'net/bluetooth')
| -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 b2bcbe2dc328..a7352ff3fd1e 100644 --- a/net/bluetooth/hidp/core.c +++ b/net/bluetooth/hidp/core.c @@ -931,7 +931,7 @@ 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); snprintf(hid->phys, sizeof(hid->phys), "%pMR", &bt_sk(session->ctrl_sock->sk)->src); |