diff options
| author | Kees Cook <keescook@chromium.org> | 2013-09-11 21:56:51 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2013-09-13 15:11:34 +0200 |
| commit | 78214e81a1bf43740ce89bb5efda78eac2f8ef83 (patch) | |
| tree | 82d36fa7693f2c6aea5a55d4eb64e57542fcae93 /drivers/hid | |
| parent | 331415ff16a12147d57d5c953f3a961b7ede348b (diff) | |
| download | lwn-78214e81a1bf43740ce89bb5efda78eac2f8ef83.tar.gz lwn-78214e81a1bf43740ce89bb5efda78eac2f8ef83.zip | |
HID: zeroplus: validate output report details
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>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-zpff.c | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/drivers/hid/hid-zpff.c b/drivers/hid/hid-zpff.c index 6ec28a37c146..a29756c6ca02 100644 --- a/drivers/hid/hid-zpff.c +++ b/drivers/hid/hid-zpff.c @@ -68,21 +68,13 @@ static int zpff_init(struct hid_device *hid) struct hid_report *report; struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list); - struct list_head *report_list = - &hid->report_enum[HID_OUTPUT_REPORT].report_list; struct input_dev *dev = hidinput->input; - int error; + int i, error; - if (list_empty(report_list)) { - hid_err(hid, "no output report found\n"); - return -ENODEV; - } - - report = list_entry(report_list->next, struct hid_report, list); - - if (report->maxfield < 4) { - hid_err(hid, "not enough fields in report\n"); - return -ENODEV; + for (i = 0; i < 4; i++) { + report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1); + if (!report) + return -ENODEV; } zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL); |