Commit c51829bb authored by Andrii Nakryiko's avatar Andrii Nakryiko Committed by Daniel Borkmann
Browse files

libbpf: check map name retrieved from ELF 



Validate there was no error retrieving symbol name corresponding to
a BPF map.

Acked-by: default avatarSong Liu <songliubraving@fb.com>
Signed-off-by: default avatarAndrii Nakryiko <andriin@fb.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent 12ef5634

tools/lib/bpf/libbpf.c

+5 −0
Original line number Diff line number Diff line
@@ -920,6 +920,11 @@ bpf_object__init_maps(struct bpf_object *obj, int flags) 
		map_name = elf_strptr(obj->efile.elf,

				      obj->efile.strtabidx,

				      sym.st_name);

		if (!map_name) {

			pr_warning("failed to get map #%d name sym string for obj %s\n",

				   map_idx, obj->path);

			return -LIBBPF_ERRNO__FORMAT;

		}



		obj->maps[map_idx].libbpf_type = LIBBPF_MAP_UNSPEC;

		obj->maps[map_idx].offset = sym.st_value;