Validate Shell Command Input Argument Vector

A fuzz test revealed that the input argument list vector
was not being validated for size, leading to a out-of-bounds
read for an empty vector.

Bug: 154500963
Test: Trivial fix
Change-Id: I8186d33eb72c036263fd0bd1b693a5d44ffb3a9f

parent 9d52426f

services/sensorservice/SensorService.cpp

+3 −0

Original line number	Diff line number	Diff line
		@@ -699,6 +699,9 @@ status_t SensorService::shellCommand(int in, int out, int err, Vector<String16>&
		if (!checkCallingPermission(sManageSensorsPermission, nullptr, nullptr)) {
		return PERMISSION_DENIED;
		}
		if (args.size() == 0) {
		return BAD_INDEX;
		}
		if (in == BAD_TYPE \|\| out == BAD_TYPE \|\| err == BAD_TYPE) {
		return BAD_VALUE;
		}