diff options
| author | Jiri Kosina <jkosina@suse.cz> | 2014-08-27 09:13:15 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-10-05 14:54:08 -0700 |
| commit | 8ee6be5563a5bdb9a5df5f88f8bbbab8930fe6da (patch) | |
| tree | 98509cf955b083645254f87be676ae3edcad8076 | |
| parent | fe63ce5175e58b55d9fa5805d24faffcad214760 (diff) | |
HID: picolcd: sanity check report size in raw_event() callback
commit 844817e47eef14141cf59b8d5ac08dd11c0a9189 upstream.
The report passed to us from transport driver could potentially be
arbitrarily large, therefore we better sanity-check it so that raw_data
that we hold in picolcd_pending structure are always kept within proper
bounds.
Reported-by: Steven Vittitoe <scvitti@google.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/hid/hid-picolcd_core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/hid/hid-picolcd_core.c b/drivers/hid/hid-picolcd_core.c index acbb021065ec..020df3c2e8b4 100644 --- a/drivers/hid/hid-picolcd_core.c +++ b/drivers/hid/hid-picolcd_core.c @@ -350,6 +350,12 @@ static int picolcd_raw_event(struct hid_device *hdev, if (!data) return 1; + if (size > 64) { + hid_warn(hdev, "invalid size value (%d) for picolcd raw event\n", + size); + return 0; + } + if (report->id == REPORT_KEY_STATE) { if (data->input_keys) ret = picolcd_raw_keypad(data, report, raw_data+1, size-1); |