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| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2016-01-19 12:34:58 +0100 |
|---|---|---|
| committer | Alain Vongsouvanh <alainv@google.com> | 2016-11-03 15:41:27 +0000 |
| commit | dc871cfc2095577a8760abe529aeff02b5908b57 (patch) | |
| tree | ce6315236b7ca7dc81039ee3a3b8010f968e2594 | |
| parent | 0ecf64d2b0edf65e5f1dd08f1f214534bc485143 (diff) | |
| download | bcm-dc871cfc2095577a8760abe529aeff02b5908b57.tar.gz | |
HID: core: prevent out-of-bound readings
Plugging a Logitech DJ receiver with KASAN activated raises a bunch of
out-of-bound readings.
The fields are allocated up to MAX_USAGE, meaning that potentially, we do
not have enough fields to fit the incoming values.
Add checks and silence KASAN.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
(cherry picked from commit 50220dead1650609206efe91f0cc116132d59b3f)
Change-Id: I2fef9c29fb389631ff8822aa212d77ad22cf9568
| -rw-r--r-- | drivers/hid/hid-core.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index e04bf0ef93a..77e78152905 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -1138,6 +1138,7 @@ static void hid_input_field(struct hid_device *hid, struct hid_field *field, /* Ignore report if ErrorRollOver */ if (!(field->flags & HID_MAIN_ITEM_VARIABLE) && value[n] >= min && value[n] <= max && + value[n] - min < field->maxusage && field->usage[value[n] - min].hid == HID_UP_KEYBOARD + 1) goto exit; } @@ -1150,11 +1151,13 @@ static void hid_input_field(struct hid_device *hid, struct hid_field *field, } if (field->value[n] >= min && field->value[n] <= max + && field->value[n] - min < field->maxusage && field->usage[field->value[n] - min].hid && search(value, field->value[n], count)) hid_process_event(hid, field, &field->usage[field->value[n] - min], 0, interrupt); if (value[n] >= min && value[n] <= max + && value[n] - min < field->maxusage && field->usage[value[n] - min].hid && search(field->value, value[n], count)) hid_process_event(hid, field, &field->usage[value[n] - min], 1, interrupt); |