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libbpf: Use proper errno value in linker

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Return values of the linker_append_sec_data() and the
linker_append_elf_relos() functions are propagated all the
way up to users of libbpf API. In some error cases these
functions return -1 which will be seen as -EPERM from user's
point of view. Instead, return a more reasonable -EINVAL.

Fixes: faf6ed321c ("libbpf: Add BPF static linker APIs")
Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250430120820.2262053-1-a.s.protopopov@gmail.com
This commit is contained in:
Anton Protopopov 2025-04-30 12:08:20 +00:00 committed by Andrii Nakryiko
parent 38d976c32d
commit 358b1c0f56
1 changed files with 2 additions and 2 deletions
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4
tools/lib/bpf/linker.c
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@ -1376,7 +1376,7 @@ static int linker_append_sec_data(struct bpf_linker *linker, struct src_obj *obj
} else {
if (!secs_match(dst_sec, src_sec)) {
pr_warn("ELF sections %s are incompatible\n", src_sec->sec_name);
return -1;
return -EINVAL;
}
/* "license" and "version" sections are deduped */
@ -2223,7 +2223,7 @@ static int linker_append_elf_relos(struct bpf_linker *linker, struct src_obj *ob
}
} else if (!secs_match(dst_sec, src_sec)) {
pr_warn("sections %s are not compatible\n", src_sec->sec_name);
return -1;
return -EINVAL;
}
/* shdr->sh_link points to SYMTAB */