From 1066c5a7d0832be91d2dc1bcee115b1866596017 Mon Sep 17 00:00:00 2001 From: Anton Protopopov Date: Wed, 30 Apr 2025 12:08:20 +0000 Subject: [PATCH] libbpf: Use proper errno value in linker [ 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: faf6ed321cf6 ("libbpf: Add BPF static linker APIs") Signed-off-by: Anton Protopopov Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20250430120820.2262053-1-a.s.protopopov@gmail.com Signed-off-by: Sasha Levin --- tools/lib/bpf/linker.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/lib/bpf/linker.c b/tools/lib/bpf/linker.c index a3a190d13db8..e1b3136643aa 100644 --- a/tools/lib/bpf/linker.c +++ b/tools/lib/bpf/linker.c @@ -1187,7 +1187,7 @@ 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 */ @@ -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)) { pr_warn("sections %s are not compatible\n", src_sec->sec_name); - return -1; + return -EINVAL; } /* shdr->sh_link points to SYMTAB */