diff options
| author | Kees Cook <keescook@chromium.org> | 2013-09-11 21:56:56 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-01 09:17:46 -0700 |
| commit | 7661107379d11e11736e3c3210a95eb421a1ad3d (patch) | |
| tree | 5f822cdaaeee6c01750d60105f21799586a01c71 /drivers/hid | |
| parent | 855f21e01243b09e5166b10e9c9e88585fc8e0c5 (diff) | |
HID: logitech-dj: validate output report details
commit 297502abb32e225fb23801fcdb0e4f6f8e17099a upstream.
A HID device could send a malicious output report that would cause the
logitech-dj HID driver to leak kernel memory contents to the device, or
trigger a NULL dereference during initialization:
[ 304.424553] usb 1-1: New USB device found, idVendor=046d, idProduct=c52b
...
[ 304.780467] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
[ 304.781409] IP: [<ffffffff815d50aa>] logi_dj_recv_send_report.isra.11+0x1a/0x90
CVE-2013-2895
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-logitech-dj.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c index 5207591a598c..0522b80eab5a 100644 --- a/drivers/hid/hid-logitech-dj.c +++ b/drivers/hid/hid-logitech-dj.c @@ -421,7 +421,7 @@ static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev, struct hid_report *report; struct hid_report_enum *output_report_enum; u8 *data = (u8 *)(&dj_report->device_index); - int i; + unsigned int i; output_report_enum = &hdev->report_enum[HID_OUTPUT_REPORT]; report = output_report_enum->report_id_hash[REPORT_ID_DJ_SHORT]; @@ -431,7 +431,7 @@ static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev, return -ENODEV; } - for (i = 0; i < report->field[0]->report_count; i++) + for (i = 0; i < DJREPORT_SHORT_LENGTH - 1; i++) report->field[0]->value[i] = data[i]; hid_hw_request(hdev, report, HID_REQ_SET_REPORT); @@ -738,6 +738,12 @@ static int logi_dj_probe(struct hid_device *hdev, goto hid_parse_fail; } + if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, REPORT_ID_DJ_SHORT, + 0, DJREPORT_SHORT_LENGTH - 1)) { + retval = -ENODEV; + goto hid_parse_fail; + } + /* Starts the usb device and connects to upper interfaces hiddev and * hidraw */ retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |