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libbpf: Clean gen_loader's attach kind.

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The gen_loader has to clear attach_kind otherwise the programs
without attach_btf_id will fail load if they follow programs
with attach_btf_id.

Fixes: 67234743736a ("libbpf: Generate loader program out of BPF ELF file.")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211201181040.23337-12-alexei.starovoitov@gmail.com
This commit is contained in:
Alexei Starovoitov
2021-12-01 10:10:34 -08:00
committed by Andrii Nakryiko
parent a7935b996f
commit 01b2b45e8d
1 changed files with 3 additions and 1 deletions
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4
src/gen_loader.c
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@@ -1018,9 +1018,11 @@ void bpf_gen__prog_load(struct bpf_gen *gen,
debug_ret(gen, "prog_load %s insn_cnt %d", attr.prog_name, attr.insn_cnt);
/* successful or not, close btf module FDs used in extern ksyms and attach_btf_obj_fd */
cleanup_relos(gen, insns_off);
if (gen->attach_kind)
if (gen->attach_kind) {
emit_sys_close_blob(gen,
attr_field(prog_load_attr, attach_btf_obj_fd));
gen->attach_kind = 0;
}
emit_check_err(gen);
/* remember prog_fd in the stack, if successful */
emit(gen, BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_7,