On Fri, Jul 22, 2022 at 07:18:23PM +0200, Roberto Sassu wrote: > The bpf() system call validates the bpf_attr structure received as > argument, and considers data until the last field, defined for each > operation. The remaing space must be filled with zeros. > > Currently, for bpf_*_get_fd_by_id() functions except bpf_map_get_fd_by_id() > the last field is *_id. Setting open_flags to BPF_F_RDONLY from user space > will result in bpf() rejecting the argument. The kernel is doing the right thing. It should not ignore fields.
