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Add bounds check to sensors direct channel creation
authorBrian Duddie <bduddie@google.com>
Thu, 15 Feb 2018 23:02:29 +0000 (15:02 -0800)
committerandroid-build-team Robot <android-build-team-robot@google.com>
Tue, 17 Apr 2018 18:02:29 +0000 (18:02 +0000)
commit2db46bcec2c14035f1e6d909c08e227cb1408fa5
treea91d02be5bfee3b50e8286b5626df83b69bb9255
parente551aa4127312e2bf9980499c0ea65c2ac36b6bf
Add bounds check to sensors direct channel creation

Avoids attempting to read a 0-size array during input validation. Adds
SafetyNet logging when this is triggered.

Also, change the cast for the ashmem size check from int to int64_t to
avoid potential conversion to negative number on 32-bit systems.

Bug: 70986337
Test: run POC, confirm via logs that function bails early
Change-Id: I674285738983f18de3466f9e818d83dabe269b7d
(cherry picked from commit 0eb4624b33aeb375ae431a6b1e2b787c959968fe)
services/sensorservice/SensorService.cpp