Suppose we are performing a use$-$after$-$free attack on Fast bins, and current vulnerable program has the following memory layout:

pwndbg$>$ p &$\_\_$malloc$\_$hook

$$1=($void $*(**)($size$\_$t$,$ const void $*))0$xf$7$e$2$db$34<\_\_$malloc$\_$hook$>$

pwndbg$>$ x$/100$x $0$xf$7$e$2$db$30$

$0$xf$7$e$2$db$30<\_\_$realloc$\_$hook$>$:$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$db$40<\_\_$after$\_$morecore$\_$hook$>$:$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$db$50$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$db$60$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$db$70<\_\_$always$\_$fail$\_$morecore$>$:$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$db$80$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$db$90$:$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dba$0$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dbb$0$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dbc$0$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dbd$0$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dbe$0<\_\_$x$86\_$string$\_$control$>$:$0$x$000000010$x$001680000$x$001680000$x$00000000$

$0$xf$7$e$2$dbf$0$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dc$00$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dc$10$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dc$20$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dc$30$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dc$40$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dc$50$:$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dc$60$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dc$70$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dc$80$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dc$90$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dca$0$ :$0$x$000000000$x$000000000$x$000000000$x$00000000$

$0$xf$7$e$2$dcb$0$ :$0$x$000000000$x$000000000$x