diff options
| author | Anderson Lizardo <anderson.lizardo@openbossa.org> | 2013-01-06 18:28:53 -0400 |
|---|---|---|
| committer | Paul Gortmaker <paul.gortmaker@windriver.com> | 2014-02-10 16:11:16 -0500 |
| commit | 0410beec773e5ea9c97486dda67620fbbb9e7189 (patch) | |
| tree | ce32a89453c864e78c15f482189224fe2c3e5270 /net | |
| parent | 90162eab0fd28b731d67b0b83db3cf434583bcdf (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: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'net')
| -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 280529ad9274..a01808691565 100644 --- a/net/bluetooth/hidp/core.c +++ b/net/bluetooth/hidp/core.c @@ -790,7 +790,7 @@ 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(&src), 64); strncpy(hid->uniq, batostr(&dst), 64); |