diff options
| author | Kees Cook <keescook@chromium.org> | 2013-09-11 21:56:52 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2013-09-13 15:12:12 +0200 |
| commit | 9446edb9a1740989cf6c20daf7510fb9a23be14a (patch) | |
| tree | 9a58264ba2bcac1c67813ac32611870c552e9101 /drivers/hid | |
| parent | 78214e81a1bf43740ce89bb5efda78eac2f8ef83 (diff) | |
| download | lwn-9446edb9a1740989cf6c20daf7510fb9a23be14a.tar.gz lwn-9446edb9a1740989cf6c20daf7510fb9a23be14a.zip | |
HID: sony: validate HID output report details
This driver must validate the availability of the HID output report and
its size before it can write LED states via buzz_set_leds(). This stops
a heap overflow that is possible if a device provides a malicious HID
output report:
[ 108.171280] usb 1-1: New USB device found, idVendor=054c, idProduct=0002
...
[ 117.507877] BUG kmalloc-192 (Not tainted): Redzone overwritten
CVE-2013-2890
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org #3.11
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-sony.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c index 30dbb6b40bbf..b18320db5f7d 100644 --- a/drivers/hid/hid-sony.c +++ b/drivers/hid/hid-sony.c @@ -537,6 +537,10 @@ static int buzz_init(struct hid_device *hdev) drv_data = hid_get_drvdata(hdev); BUG_ON(!(drv_data->quirks & BUZZ_CONTROLLER)); + /* Validate expected report characteristics. */ + if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, 0, 0, 7)) + return -ENODEV; + buzz = kzalloc(sizeof(*buzz), GFP_KERNEL); if (!buzz) { hid_err(hdev, "Insufficient memory, cannot allocate driver data\n"); |