unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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bpf: Move bpf_loop and bpf_for_each_map_elem under CAP_BPF

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They would require func_info which needs prog BTF anyway. Loading BTF
and setting the prog btf_fd while loading the prog indirectly requires
CAP_BPF, so just to reduce confusion, move both these helpers taking
callback under bpf_capable() protection as well, since they cannot be
used without CAP_BPF.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20220823013117.24916-1-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Kumar Kartikeya Dwivedi 2022-08-23 03:31:17 +02:00 committed by Alexei Starovoitov
parent f52c894734
commit 5679ff2f13
1 changed files with 4 additions and 4 deletions
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8
kernel/bpf/helpers.c
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@ -1613,10 +1613,6 @@ bpf_base_func_proto(enum bpf_func_id func_id)
return &bpf_ringbuf_submit_dynptr_proto;
case BPF_FUNC_ringbuf_discard_dynptr:
return &bpf_ringbuf_discard_dynptr_proto;
case BPF_FUNC_for_each_map_elem:
return &bpf_for_each_map_elem_proto;
case BPF_FUNC_loop:
return &bpf_loop_proto;
case BPF_FUNC_strncmp:
return &bpf_strncmp_proto;
case BPF_FUNC_strtol:
@ -1659,6 +1655,10 @@ bpf_base_func_proto(enum bpf_func_id func_id)
return &bpf_timer_cancel_proto;
case BPF_FUNC_kptr_xchg:
return &bpf_kptr_xchg_proto;
case BPF_FUNC_for_each_map_elem:
return &bpf_for_each_map_elem_proto;
case BPF_FUNC_loop:
return &bpf_loop_proto;
default:
break;
}