openharmony/third_party_libbpf
1
0
Fork 0
mirror of https://gitee.com/openharmony/third_party_libbpf synced 2024-10-07 22:43:33 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

libbpf: Reject static entry-point BPF programs

Browse Source 
Detect use of static entry-point BPF programs (those with SEC() markings) and
emit error message. This is similar to
c1cccec9c636 ("libbpf: Reject static maps") but for BPF programs.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20210514195534.1440970-1-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko 2021-05-14 12:55:34 -07:00 committed by Andrii Nakryiko
parent 68695d0173
commit 6028cec50c
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/libbpf.c
View File

@ -677,6 +677,11 @@ bpf_object__add_programs(struct bpf_object *obj, Elf_Data *sec_data,
return -LIBBPF_ERRNO__FORMAT;
}
if (sec_idx != obj->efile.text_shndx && GELF_ST_BIND(sym.st_info) == STB_LOCAL) {
pr_warn("sec '%s': program '%s' is static and not supported\n", sec_name, name);
return -ENOTSUP;
}
pr_debug("sec '%s': found program '%s' at insn offset %zu (%zu bytes), code size %zu insns (%zu bytes)\n",
sec_name, name, sec_off / BPF_INSN_SZ, sec_off, prog_sz / BPF_INSN_SZ, prog_sz);