From 320a36063e1441210106aa33997ad3770d4c86b4 Mon Sep 17 00:00:00 2001 From: Andrii Nakryiko Date: Tue, 3 Mar 2020 10:08:00 -0800 Subject: [PATCH] libbpf: Fix handling of optional field_name in btf_dump__emit_type_decl Internal functions, used by btf_dump__emit_type_decl(), assume field_name is never going to be NULL. Ensure it's always the case. Fixes: 9f81654eebe8 ("libbpf: Expose BTF-to-C type declaration emitting API") Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20200303180800.3303471-1-andriin@fb.com --- tools/lib/bpf/btf_dump.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/lib/bpf/btf_dump.c b/tools/lib/bpf/btf_dump.c index bd09ed1710f1..dc451e4de5ad 100644 --- a/tools/lib/bpf/btf_dump.c +++ b/tools/lib/bpf/btf_dump.c @@ -1030,7 +1030,7 @@ int btf_dump__emit_type_decl(struct btf_dump *d, __u32 id, if (!OPTS_VALID(opts, btf_dump_emit_type_decl_opts)) return -EINVAL; - fname = OPTS_GET(opts, field_name, NULL); + fname = OPTS_GET(opts, field_name, ""); lvl = OPTS_GET(opts, indent_level, 0); btf_dump_emit_type_decl(d, id, fname, lvl); return 0;