Fix a segfault in AudioFlinger.

Check the string returned by a HAL's implementation of get_parameters
for NULL before attempting to make use of it. That way, we won't
bring down the mediaserver because of a poorly written HAL.

Change-Id: I45f0fd3de003151f98acf32c36c42f58d053f3a0

parent 4dd8338b

services/audioflinger/AudioFlinger.cpp

+1 −1

Original line number	Diff line number	Diff line
		@@ -923,7 +923,7 @@ String8 AudioFlinger::getParameters(int ioHandle, const String8& keys)
		for (size_t i = 0; i < mAudioHwDevs.size(); i++) {
		audio_hw_device_t *dev = mAudioHwDevs[i];
		char *s = dev->get_parameters(dev, keys.string());
		out_s8 += String8(s);
		out_s8 += String8(s ? s : "");
		free(s);
		}
		return out_s8;