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| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2016-01-19 12:34:58 +0100 |
|---|---|---|
| committer | Andreas Blaesius <skate4life@gmx.de> | 2016-11-09 00:23:01 +0100 |
| commit | 5a1858ee97d57185c5566594dd7e5da705e2de68 (patch) | |
| tree | 1b46041e93952265f6d5b740a9294562d726989d | |
| parent | 82adae1d9463147ee0e86093dfc23f6e8c3a7db1 (diff) | |
| download | kernel_samsung_espresso10-5a1858ee97d57185c5566594dd7e5da705e2de68.tar.gz kernel_samsung_espresso10-5a1858ee97d57185c5566594dd7e5da705e2de68.tar.bz2 kernel_samsung_espresso10-5a1858ee97d57185c5566594dd7e5da705e2de68.zip | |
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.
Change-Id: I11d44957b450a3eda258c05f9e833c71a079e83c
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| -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 8fa2cd73655..4a61a89e9f4 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -977,6 +977,7 @@ 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; } @@ -989,11 +990,13 @@ 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); |