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| author | Jiri Kosina <jkosina@suse.cz> | 2014-08-27 09:13:15 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2014-08-27 09:14:39 +0200 |
| commit | 844817e47eef14141cf59b8d5ac08dd11c0a9189 (patch) | |
| tree | 7b4fbe046727d187383cd8497bf7b14ce1139bb4 /drivers/hid | |
| parent | c54def7bd64d7c0b6993336abcffb8444795bf38 (diff) | |
| download | linux-844817e47eef14141cf59b8d5ac08dd11c0a9189.tar.gz | |
HID: picolcd: sanity check report size in raw_event() callback
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. Cc: stable@vger.kernel.org Reported-by: Steven Vittitoe <scvitti@google.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
| -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); |