NativeMIDI: Fix access to unaligned 64-bit data

Accessing unaligned 64-bit data in 32-bit ARM code leads
to SIGBUS / BUS_ADRALN fault. Since the timestamp position
in the message buffer is arbitrary, use memcpy to copy
it to the output argument.

Bug: 114123427
Test: 32-bit android.nativemidi.cts.NativeMidiEchoTest
Change-Id: I0cb08cb0b124e3f4a05ea19bf91f40081a584a2e

1 files changed, 2 insertions, 1 deletions

diff --git a/media/native/midi/midi.cpp b/media/native/midi/midi.cpp
index 78ca0ab2486e..a5bdba8569b8 100644
--- a/media/native/midi/midi.cpp
+++ b/media/native/midi/midi.cpp
@@ -338,7 +338,8 @@ public:
             numMessageBytes = std::min(maxBytes, numMessageBytes);
             memcpy(buffer, readBuffer + 1, numMessageBytes);
             if (timestampPtr != nullptr) {
-                *timestampPtr = *(uint64_t*)(readBuffer + readCount - sizeof(uint64_t));
+                memcpy(timestampPtr, readBuffer + readCount - sizeof(uint64_t),
+                        sizeof(*timestampPtr));
             }
         }
         *numBytesReceivedPtr = numMessageBytes;