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libbpf: Use proper errno value in linker

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[ Upstream commit 358b1c0f56ebb6996fcec7dcdcf6bae5dcbc8b6c ]

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
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Anton Protopopov
2025-04-30 12:08:20 +00:00
committed by Greg Kroah-Hartman
parent 1c005c53cf
commit 1066c5a7d0
1 changed files with 2 additions and 2 deletions
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4
tools/lib/bpf/linker.c
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@@ -1187,7 +1187,7 @@ static int linker_append_sec_data(struct bpf_linker *linker, struct src_obj *obj
} else { } else {
if (!secs_match(dst_sec, src_sec)) { if (!secs_match(dst_sec, src_sec)) {
pr_warn("ELF sections %s are incompatible\n", src_sec->sec_name); pr_warn("ELF sections %s are incompatible\n", src_sec->sec_name);
return -1; return -EINVAL;
} }
/* "license" and "version" sections are deduped */ /* "license" and "version" sections are deduped */
@@ -2034,7 +2034,7 @@ static int linker_append_elf_relos(struct bpf_linker *linker, struct src_obj *ob
} }
} else if (!secs_match(dst_sec, src_sec)) { } else if (!secs_match(dst_sec, src_sec)) {
pr_warn("sections %s are not compatible\n", src_sec->sec_name); pr_warn("sections %s are not compatible\n", src_sec->sec_name);
return -1; return -EINVAL;
} }
/* shdr->sh_link points to SYMTAB */ /* shdr->sh_link points to SYMTAB */