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| author | John Fastabend <john.fastabend@gmail.com> | 2020-07-03 06:31:59 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-07-03 23:20:40 +0200 |
| commit | 8ae4121bd89e3dce27b519ed469efbc15423af18 (patch) | |
| tree | 58e74e54cc6d21f7702c2f8a0179d2cb9facba79 /tools/bpf | |
| parent | bpf: Fix build without CONFIG_STACKTRACE (diff) | |
| download | linux-8ae4121bd89e3dce27b519ed469efbc15423af18.tar.xz linux-8ae4121bd89e3dce27b519ed469efbc15423af18.zip | |
bpf: Fix bpftool without skeleton code enabled
Fix segfault from bpftool by adding emit_obj_refs_plain when skeleton
code is disabled.
Tested by deleting BUILD_BPF_SKELS in Makefile. We found this doing
backports for Cilium when a testing image pulled in latest bpf-next
bpftool, but kept using an older clang-7.
# ./bpftool prog show
Error: bpftool built without PID iterator support
3: cgroup_skb tag 7be49e3934a125ba gpl
loaded_at 2020-07-01T08:01:29-0700 uid 0
Segmentation fault
Fixes: d53dee3fe013 ("tools/bpftool: Show info for processes holding BPF map/prog/link/btf FDs")
Reported-by: Joe Stringer <joe@wand.net.nz>
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/159375071997.14984.17404504293832961401.stgit@john-XPS-13-9370
Diffstat (limited to 'tools/bpf')
| -rw-r--r-- | tools/bpf/bpftool/pids.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/bpf/bpftool/pids.c b/tools/bpf/bpftool/pids.c index 2709be4de2b1..7d5416667c85 100644 --- a/tools/bpf/bpftool/pids.c +++ b/tools/bpf/bpftool/pids.c @@ -19,6 +19,7 @@ int build_obj_refs_table(struct obj_refs_table *table, enum bpf_obj_type type) return -ENOTSUP; } void delete_obj_refs_table(struct obj_refs_table *table) {} +void emit_obj_refs_plain(struct obj_refs_table *table, __u32 id, const char *prefix) {} #else /* BPFTOOL_WITHOUT_SKELETONS */ |