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Date: Wed, 8 Jul 2020 13:08:27 +0200 From: louis.peens@...ronome.com To: ast@...nel.org Cc: netdev@...r.kernel.org, bpf@...r.kernel.org, daniel@...earbox.net, john.fastabend@...il.com, oss-drivers@...ronome.com, Louis Peens <louis.peens@...ronome.com> Subject: [PATCH bpf-next] bpf: Fix another bpftool segfault without skeleton code enabled From: Louis Peens <louis.peens@...ronome.com> emit_obj_refs_json needs to added the same as with emit_obj_refs_plain to prevent segfaults, similar to Commit "8ae4121bd89e bpf: Fix bpftool without skeleton code enabled"). See the error below: # ./bpftool -p prog { "error": "bpftool built without PID iterator support" },[{ "id": 2, "type": "cgroup_skb", "tag": "7be49e3934a125ba", "gpl_compatible": true, "loaded_at": 1594052789, "uid": 0, "bytes_xlated": 296, "jited": true, "bytes_jited": 203, "bytes_memlock": 4096, "map_ids": [2,3 Segmentation fault (core dumped) The same happens for ./bpftool -p map, as well as ./bpftool -j prog/map. Fixes: d53dee3fe013 ("tools/bpftool: Show info for processes holding BPF map/prog/link/btf FDs") Signed-off-by: Louis Peens <louis.peens@...ronome.com> Reviewed-by: Simon Horman <simon.horman@...ronome.com> --- tools/bpf/bpftool/pids.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/bpf/bpftool/pids.c b/tools/bpf/bpftool/pids.c index 7d5416667c85..c0d23ce4a6f4 100644 --- a/tools/bpf/bpftool/pids.c +++ b/tools/bpf/bpftool/pids.c @@ -20,6 +20,7 @@ int build_obj_refs_table(struct obj_refs_table *table, enum bpf_obj_type type) } 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) {} +void emit_obj_refs_json(struct obj_refs_table *table, __u32 id, json_writer_t *json_writer) {} #else /* BPFTOOL_WITHOUT_SKELETONS */ -- 2.17.1
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