Comment 7 for bug 1714254

More gdb info

Both threads are trying to lock:

p *(pthread_mutex_t*)0x55e8a5ae4aa0
$3 = {__data = {__lock = 2, __count = 0, __owner = 30193, __nusers = 1, __kind = 512, __spins = 0, __elision = 0, __list = {
      __prev = 0x0, __next = 0x0}},
  __size = "\002\000\000\000\000\000\000\000\361u\000\000\001\000\000\000\000\002", '\000' <repeats 21 times>, __align = 2}

owner is 30193 which is the thread attempting to start the qemu process; possible that its trying to re-lock when it already owns the lock?