[ 15/49] HID: steelseries: validate output report details

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kees Cook <keescook@chromium.org>

commit 41df7f6d43723deb7364340b44bc5d94bf717456 upstream.

A HID device could send a malicious output report that would cause the
steelseries HID driver to write beyond the output report allocation
during initialization, causing a heap overflow:

[  167.981534] usb 1-1: New USB device found, idVendor=1038, idProduct=1410
...
[  182.050547] BUG kmalloc-256 (Tainted: G        W   ): Redzone overwritten

CVE-2013-2891

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/hid/hid-steelseries.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/hid/hid-steelseries.c
+++ b/drivers/hid/hid-steelseries.c
@@ -249,6 +249,11 @@ static int steelseries_srws1_probe(struc
 		goto err_free;
 	}
 
+	if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, 0, 0, 16)) {
+		ret = -ENODEV;
+		goto err_free;
+	}
+
 	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 	if (ret) {
 		hid_err(hdev, "hw start failed\n");