Piteball
/
android_kernel_samsung_msm8976
mirror of https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
1
1
Fork 0
Code Issues Projects Releases Wiki Activity

HID: Fix assumption that devices have inputs 

commit d9d4b1e46d9543a82c23f6df03f4ad697dab361b upstream.

The syzbot fuzzer found a slab-out-of-bounds write bug in the hid-gaff
driver.  The problem is caused by the driver's assumption that the
device must have an input report.  While this will be true for all
normal HID input devices, a suitably malicious device can violate the
assumption.

The same assumption is present in over a dozen other HID drivers.
This patch fixes them by checking that the list of hid_inputs for the
hid_device is nonempty before allowing it to be used.

Reported-and-tested-by: syzbot+403741a091bf41d4ae79@syzkaller.appspotmail.com
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@vger.kernel.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ica4d1b6adc1bcb30ce077f7d954cb8ba94bce730
This commit is contained in:
Alan Stern 2019-10-03 14:53:59 -04:00 committed by L R
parent 72fb1a1e6c
commit 187d27cc7e
11 changed files with 99 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/hid/hid-axff.c
View File

@ -75,13 +75,20 @@ static int axff_init(struct hid_device *hid)
{
struct axff_device *axff;
struct hid_report *report;
struct hid_input *hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
struct hid_input *hidinput;
struct list_head *report_list =&hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct input_dev *dev = hidinput->input;
struct input_dev *dev;
int field_count = 0;
int i, j;
int error;
if (list_empty(&hid->inputs)) {
hid_err(hid, "no inputs found\n");
return -ENODEV;
}
hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
dev = hidinput->input;
if (list_empty(report_list)) {
hid_err(hid, "no output reports found\n");
return -ENODEV;

12
drivers/hid/hid-dr.c
View File

@ -87,13 +87,19 @@ static int drff_init(struct hid_device *hid)
{
struct drff_device *drff;
struct hid_report *report;
struct hid_input *hidinput = list_first_entry(&hid->inputs,
struct hid_input, list);
struct hid_input *hidinput;
struct list_head *report_list =
&hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct input_dev *dev = hidinput->input;
struct input_dev *dev;
int error;
if (list_empty(&hid->inputs)) {
hid_err(hid, "no inputs found\n");
return -ENODEV;
}
hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
dev = hidinput->input;
if (list_empty(report_list)) {
hid_err(hid, "no output reports found\n");
return -ENODEV;

12
drivers/hid/hid-emsff.c
View File

@ -59,13 +59,19 @@ static int emsff_init(struct hid_device *hid)
{
struct emsff_device *emsff;
struct hid_report *report;
struct hid_input *hidinput = list_first_entry(&hid->inputs,
struct hid_input, list);
struct hid_input *hidinput;
struct list_head *report_list =
&hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct input_dev *dev = hidinput->input;
struct input_dev *dev;
int error;
if (list_empty(&hid->inputs)) {
hid_err(hid, "no inputs found\n");
return -ENODEV;
}
hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
dev = hidinput->input;
if (list_empty(report_list)) {
hid_err(hid, "no output reports found\n");
return -ENODEV;

12
drivers/hid/hid-gaff.c
View File

@ -77,14 +77,20 @@ static int gaff_init(struct hid_device *hid)
{
struct gaff_device *gaff;
struct hid_report *report;
struct hid_input *hidinput = list_entry(hid->inputs.next,
struct hid_input, list);
struct hid_input *hidinput;
struct list_head *report_list =
&hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct list_head *report_ptr = report_list;
struct input_dev *dev = hidinput->input;
struct input_dev *dev;
int error;
if (list_empty(&hid->inputs)) {
hid_err(hid, "no inputs found\n");
return -ENODEV;
}
hidinput = list_entry(hid->inputs.next, struct hid_input, list);
dev = hidinput->input;
if (list_empty(report_list)) {
hid_err(hid, "no output reports found\n");
return -ENODEV;

12
drivers/hid/hid-holtekff.c
View File

@ -140,13 +140,19 @@ static int holtekff_init(struct hid_device *hid)
{
struct holtekff_device *holtekff;
struct hid_report *report;
struct hid_input *hidinput = list_entry(hid->inputs.next,
struct hid_input, list);
struct hid_input *hidinput;
struct list_head *report_list =
&hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct input_dev *dev = hidinput->input;
struct input_dev *dev;
int error;
if (list_empty(&hid->inputs)) {
hid_err(hid, "no inputs found\n");
return -ENODEV;
}
hidinput = list_entry(hid->inputs.next, struct hid_input, list);
dev = hidinput->input;
if (list_empty(report_list)) {
hid_err(hid, "no output report found\n");
return -ENODEV;

12
drivers/hid/hid-lg2ff.c
View File

@ -62,11 +62,17 @@ int lg2ff_init(struct hid_device *hid)
{
struct lg2ff_device *lg2ff;
struct hid_report *report;
struct hid_input *hidinput = list_entry(hid->inputs.next,
struct hid_input, list);
struct input_dev *dev = hidinput->input;
struct hid_input *hidinput;
struct input_dev *dev;
int error;
if (list_empty(&hid->inputs)) {
hid_err(hid, "no inputs found\n");
return -ENODEV;
}
hidinput = list_entry(hid->inputs.next, struct hid_input, list);
dev = hidinput->input;
/* Check that the report looks ok */
report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7);
if (!report)

11
drivers/hid/hid-lg3ff.c
View File

@ -129,12 +129,19 @@ static const signed short ff3_joystick_ac[] = {
int lg3ff_init(struct hid_device *hid)
{
struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
struct input_dev *dev = hidinput->input;
struct hid_input *hidinput;
struct input_dev *dev;
const signed short *ff_bits = ff3_joystick_ac;
int error;
int i;
if (list_empty(&hid->inputs)) {
hid_err(hid, "no inputs found\n");
return -ENODEV;
}
hidinput = list_entry(hid->inputs.next, struct hid_input, list);
dev = hidinput->input;
/* Check that the report looks ok */
if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 35))
return -ENODEV;

11
drivers/hid/hid-lg4ff.c
View File

@ -517,14 +517,21 @@ static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cde
int lg4ff_init(struct hid_device *hid)
{
struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
struct input_dev *dev = hidinput->input;
struct hid_input *hidinput;
struct input_dev *dev;
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
struct usb_device_descriptor *udesc;
int error, i, j;
__u16 bcdDevice, rev_maj, rev_min;
if (list_empty(&hid->inputs)) {
hid_err(hid, "no inputs found\n");
return -ENODEV;
}
hidinput = list_entry(hid->inputs.next, struct hid_input, list);
dev = hidinput->input;
/* Check that the report looks ok */
if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7))
return -1;

11
drivers/hid/hid-lgff.c
View File

@ -127,12 +127,19 @@ static void hid_lgff_set_autocenter(struct input_dev *dev, u16 magnitude)
int lgff_init(struct hid_device* hid)
{
struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
struct input_dev *dev = hidinput->input;
struct hid_input *hidinput;
struct input_dev *dev;
const signed short *ff_bits = ff_joystick;
int error;
int i;
if (list_empty(&hid->inputs)) {
hid_err(hid, "no inputs found\n");
return -ENODEV;
}
hidinput = list_entry(hid->inputs.next, struct hid_input, list);
dev = hidinput->input;
/* Check that the report looks ok */
if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7))
return -ENODEV;

12
drivers/hid/hid-tmff.c
View File

@ -126,12 +126,18 @@ static int tmff_init(struct hid_device *hid, const signed short *ff_bits)
struct tmff_device *tmff;
struct hid_report *report;
struct list_head *report_list;
struct hid_input *hidinput = list_entry(hid->inputs.next,
struct hid_input, list);
struct input_dev *input_dev = hidinput->input;
struct hid_input *hidinput;
struct input_dev *input_dev;
int error;
int i;
if (list_empty(&hid->inputs)) {
hid_err(hid, "no inputs found\n");
return -ENODEV;
}
hidinput = list_entry(hid->inputs.next, struct hid_input, list);
input_dev = hidinput->input;
tmff = kzalloc(sizeof(struct tmff_device), GFP_KERNEL);
if (!tmff)
return -ENOMEM;

12
drivers/hid/hid-zpff.c
View File

@ -66,11 +66,17 @@ static int zpff_init(struct hid_device *hid)
{
struct zpff_device *zpff;
struct hid_report *report;
struct hid_input *hidinput = list_entry(hid->inputs.next,
struct hid_input, list);
struct input_dev *dev = hidinput->input;
struct hid_input *hidinput;
struct input_dev *dev;
int i, error;
if (list_empty(&hid->inputs)) {
hid_err(hid, "no inputs found\n");
return -ENODEV;
}
hidinput = list_entry(hid->inputs.next, struct hid_input, list);
dev = hidinput->input;
for (i = 0; i < 4; i++) {
report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1);
if (!report)