Sysmalloc assertion failed

[zaphida]

 kernel  ~  Downloads  ./sshhack.o 1 2 24 4 104.154.17.45 22 0
sshhack.o: malloc.c:2617: sysmalloc: Assertion (old_top == initial_top (av) && old_size == 0) || ((unsigned long) (old_size) >= MINSIZE && prev_inuse (old_top) && ((unsigned long) old_end & (pagesize - 1)) == 0)' failed. Aborted  kernel  ~  Downloads  SIGABRT  ./sshhack.o 1 2 8 4 104.154.17.45 22 0 sshhack.o: malloc.c:2617: sysmalloc: Assertion (old_top == initial_top (av) && old_size == 0) || ((unsigned long) (old_size) >= MINSIZE && prev_inuse (old_top) && ((unsigned long) old_end & (pagesize - 1)) == 0)' failed.
Aborted
 kernel  ~  Downloads  SIGABRT  ./sshhack.o 1 2 4 4 104.154.17.45 22 0
sshhack.o: malloc.c:2617: sysmalloc: Assertion `(old_top == initial_top (av) && old_size == 0) || ((unsigned long) (old_size) >= MINSIZE && prev_inuse (old_top) && ((unsigned long) old_end & (pagesize - 1)) == 0)' failed.
Aborted
 kernel  ~  Downloads  SIGABRT  

[Plumatester]

Second this. I don't understand how you are even supposed to get RCE with this.