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add number constraint for samples per MotionEvent

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am: 5d17838ade

* commit '5d17838adef13062717322e79d4db0b9bb6b2395':
  add number constraint for samples per MotionEvent
This commit is contained in:
Flanker 2015-10-22 02:02:46 +00:00 committed by android-build-merger
commit 72c8ca4a01
2 changed files with 7 additions and 1 deletions
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5
include/input/Input.h
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@ -110,6 +110,11 @@ enum {
*/
#define MAX_POINTERS 16
/*
* Maximum number of samples supported per motion event.
*/
#define MAX_SAMPLES UINT16_MAX
/*
* Maximum pointer id value supported in a motion event.
* Smallest pointer id is 0.

3
libs/input/Input.cpp
View File

@ -490,7 +490,8 @@ void MotionEvent::transform(const float matrix[9]) {
status_t MotionEvent::readFromParcel(Parcel* parcel) {
size_t pointerCount = parcel->readInt32();
size_t sampleCount = parcel->readInt32();
if (pointerCount == 0 || pointerCount > MAX_POINTERS || sampleCount == 0) {
if (pointerCount == 0 || pointerCount > MAX_POINTERS ||
sampleCount == 0 || sampleCount > MAX_SAMPLES) {
return BAD_VALUE;
}