fix edge case (partial write of LV2 worker message size)

diff --git a/libs/ardour/worker.cc b/libs/ardour/worker.cc
index d5238adb60e49377e95810c5b3e1451b28e688a6..b110dc286f875454f272cfef6735267a5f7d6407 100644 (file)
--- a/libs/ardour/worker.cc
+++ b/libs/ardour/worker.cc
@@ -82,6 +82,9 @@ Worker::verify_message_completeness(RingBuffer<uint8_t>* rb)
        uint32_t size;
        RingBuffer<uint8_t>::rw_vector vec;
        rb->get_read_vector (&vec);
+       if (vec.len[0] + vec.len[1] < sizeof(size)) {
+               return false;
+       }
        if (vec.len[0] >= sizeof(size)) {
                memcpy (&size, vec.buf[0], sizeof (size));
        } else {