prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000001b00))
mprotect(&(0x7f0000ffa000/0x3000)=nil, 0x3000, 0x0)
mlock(&(0x7f0000ff9000/0x2000)=nil, 0x2000)
mprotect(&(0x7f0000ffd000/0x2000)=nil, 0x2000, 0x0)