Kernel: Use Userspace<T> in sys$get_stack_bounds()

Kernel/Process.h

@@ -346,7 +346,7 @@ public:
     KResultOr<int> sys$pledge(Userspace<const Syscall::SC_pledge_params*>);
     KResultOr<int> sys$unveil(Userspace<const Syscall::SC_unveil_params*>);
     KResultOr<int> sys$perf_event(int type, FlatPtr arg1, FlatPtr arg2);
-    KResultOr<int> sys$get_stack_bounds(FlatPtr* stack_base, size_t* stack_size);
+    KResultOr<int> sys$get_stack_bounds(Userspace<FlatPtr*> stack_base, Userspace<size_t*> stack_size);
     KResultOr<int> sys$ptrace(Userspace<const Syscall::SC_ptrace_params*>);
     KResultOr<int> sys$sendfd(int sockfd, int fd);
     KResultOr<int> sys$recvfd(int sockfd, int options);

Kernel/Syscalls/get_stack_bounds.cpp

@@ -30,7 +30,7 @@
 
 namespace Kernel {
 
-KResultOr<int> Process::sys$get_stack_bounds(FlatPtr* user_stack_base, size_t* user_stack_size)
+KResultOr<int> Process::sys$get_stack_bounds(Userspace<FlatPtr*> user_stack_base, Userspace<size_t*> user_stack_size)
 {
     FlatPtr stack_pointer = Thread::current()->get_register_dump_from_stack().userspace_esp;
     auto* stack_region = space().find_region_containing(Range { VirtualAddress(stack_pointer), 1 });