From: Andrii Nakryiko <andrii@kernel.org> mainline inclusion from mainline-5.13-rc1 commit 78b226d48106fc91628f941c66545f05273269df category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I5EUVD CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... ------------------------------------------------- Skip BTF fixup step when input object file is missing BTF altogether. Fixes: 8fd27bf69b86 ("libbpf: Add BPF static linker BTF and BTF.ext support") Reported-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Tested-by: Jiri Olsa <jolsa@redhat.com> Link: https://lore.kernel.org/bpf/20210319205909.1748642-3-andrii@kernel.org (cherry picked from commit 78b226d48106fc91628f941c66545f05273269df) Signed-off-by: Wang Yufen <wangyufen@huawei.com> --- tools/lib/bpf/linker.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/lib/bpf/linker.c b/tools/lib/bpf/linker.c index b4fff912dce2..5e0aa2f2c0ca 100644 --- a/tools/lib/bpf/linker.c +++ b/tools/lib/bpf/linker.c @@ -1313,6 +1313,9 @@ static int linker_fixup_btf(struct src_obj *obj) struct src_sec *sec; int i, j, n, m; + if (!obj->btf) + return 0; + n = btf__get_nr_types(obj->btf); for (i = 1; i <= n; i++) { struct btf_var_secinfo *vi; -- 2.20.1