segfault in mprotect

[donbowman]

trying to mark mprotect as not avail.
ubuntu 22.04, x86-64.
below will segfault.

#include <libsyscall_intercept_hook_point.h>
#include <syscall.h>
#include <errno.h>

static int
hook(long syscall_number,
                        long arg0, long arg1,
                        long arg2, long arg3,
                        long arg4, long arg5,
                        long *result)
{
        if (syscall_number == SYS_mprotect) {
                *result = -ENOTSUP;
                return 0;
        } else {
                return 1;
        }
}

static __attribute__((constructor)) void
init(void)
{
        intercept_hook_point = hook;
}

[en4bz]

Can you share a backtrace if possible?