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78214e81a1
The zeroplus HID driver was not checking the size of allocated values in fields it used. A HID device could send a malicious output report that would cause the driver to write beyond the output report allocation during initialization, causing a heap overflow: [ 1442.728680] usb 1-1: New USB device found, idVendor=0c12, idProduct=0005 ... [ 1466.243173] BUG kmalloc-192 (Tainted: G W ): Redzone overwritten CVE-2013-2889 Signed-off-by: Kees Cook <keescook@chromium.org> Cc: stable@vger.kernel.org Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
148 lines
3.6 KiB
C
148 lines
3.6 KiB
C
/*
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* Force feedback support for Zeroplus based devices
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*
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* Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com>
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/hid.h>
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#include <linux/input.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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#ifdef CONFIG_ZEROPLUS_FF
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struct zpff_device {
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struct hid_report *report;
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};
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static int zpff_play(struct input_dev *dev, void *data,
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struct ff_effect *effect)
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{
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struct hid_device *hid = input_get_drvdata(dev);
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struct zpff_device *zpff = data;
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int left, right;
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/*
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* The following is specified the other way around in the Zeroplus
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* datasheet but the order below is correct for the XFX Executioner;
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* however it is possible that the XFX Executioner is an exception
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*/
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left = effect->u.rumble.strong_magnitude;
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right = effect->u.rumble.weak_magnitude;
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dbg_hid("called with 0x%04x 0x%04x\n", left, right);
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left = left * 0x7f / 0xffff;
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right = right * 0x7f / 0xffff;
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zpff->report->field[2]->value[0] = left;
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zpff->report->field[3]->value[0] = right;
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dbg_hid("running with 0x%02x 0x%02x\n", left, right);
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hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT);
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return 0;
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}
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static int zpff_init(struct hid_device *hid)
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{
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struct zpff_device *zpff;
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struct hid_report *report;
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struct hid_input *hidinput = list_entry(hid->inputs.next,
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struct hid_input, list);
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struct input_dev *dev = hidinput->input;
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int i, error;
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for (i = 0; i < 4; i++) {
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report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1);
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if (!report)
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return -ENODEV;
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}
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zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL);
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if (!zpff)
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return -ENOMEM;
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set_bit(FF_RUMBLE, dev->ffbit);
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error = input_ff_create_memless(dev, zpff, zpff_play);
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if (error) {
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kfree(zpff);
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return error;
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}
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zpff->report = report;
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zpff->report->field[0]->value[0] = 0x00;
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zpff->report->field[1]->value[0] = 0x02;
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zpff->report->field[2]->value[0] = 0x00;
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zpff->report->field[3]->value[0] = 0x00;
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hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT);
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hid_info(hid, "force feedback for Zeroplus based devices by Anssi Hannula <anssi.hannula@gmail.com>\n");
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return 0;
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}
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#else
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static inline int zpff_init(struct hid_device *hid)
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{
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return 0;
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}
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#endif
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static int zp_probe(struct hid_device *hdev, const struct hid_device_id *id)
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{
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int ret;
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ret = hid_parse(hdev);
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if (ret) {
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hid_err(hdev, "parse failed\n");
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goto err;
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}
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
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if (ret) {
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hid_err(hdev, "hw start failed\n");
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goto err;
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}
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zpff_init(hdev);
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return 0;
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err:
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return ret;
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}
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static const struct hid_device_id zp_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, zp_devices);
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static struct hid_driver zp_driver = {
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.name = "zeroplus",
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.id_table = zp_devices,
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.probe = zp_probe,
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};
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module_hid_driver(zp_driver);
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MODULE_LICENSE("GPL");
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