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folio_daemon: Avoid UAF with stale sensor handle am: 948ad9c58c am: 92f0fa9448

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Change-Id: Iecce6d22c8a65e677f53f200d494c303b877ef3c
This commit is contained in:
Andrew Lehmer
2020-04-07 19:28:34 +00:00
committed by Automerger Merge Worker
parent ad7825fc2a 92f0fa9448
commit f8136059a5
1 changed files with 11 additions and 9 deletions
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20
folio_daemon/main.cpp
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@@ -45,6 +45,7 @@ int main(void) {
ASensorRef hallSensor;
ALooper *looper;
ASensorEventQueue *eventQueue = nullptr;
int32_t hallMinDelay = 0;
time_t lastWarn = 0;
int attemptCount = 0;
@@ -87,6 +88,14 @@ int main(void) {
// Get Hall-effect sensor events from the NDK
sensorManager = ASensorManager_getInstanceForPackage(nullptr);
looper = ALooper_forThread();
if (looper == nullptr) {
looper = ALooper_prepare(ALOOPER_PREPARE_ALLOW_NON_CALLBACKS);
}
eventQueue = ASensorManager_createEventQueue(sensorManager, looper, 0, NULL,
NULL);
/*
* As long as we are unable to get the sensor handle, periodically retry
* and emit an error message at a low frequency to prevent high CPU usage
@@ -98,6 +107,7 @@ int main(void) {
hallSensor = ASensorManager_getDefaultSensor(sensorManager,
SENSOR_TYPE);
if (hallSensor != nullptr) {
hallMinDelay = ASensor_getMinDelay(hallSensor);
break;
}
@@ -112,16 +122,8 @@ int main(void) {
sleep(RETRY_PERIOD);
}
looper = ALooper_forThread();
if (looper == nullptr) {
looper = ALooper_prepare(ALOOPER_PREPARE_ALLOW_NON_CALLBACKS);
}
eventQueue = ASensorManager_createEventQueue(sensorManager, looper, 0, NULL,
NULL);
err = ASensorEventQueue_registerSensor(eventQueue, hallSensor,
ASensor_getMinDelay(hallSensor),
10000);
hallMinDelay, 10000);
if (err < 0) {
ALOGE("Unable to register for Hall-effect sensor events");
goto out;