static Sdb *store_versioninfo_gnu_verdef(ELFOBJ *bin, Elf_(Shdr) *shdr, int sz) {
	const char *section_name = "";
	const char *link_section_name = "";
	char *end = NULL;
	Elf_(Shdr) *link_shdr = NULL;
	ut8 dfs[sizeof (Elf_(Verdef))] = {0};
	Sdb *sdb;
	int cnt, i;
	if (shdr->sh_link > bin->ehdr.e_shnum) {
 		return false;
 	}
 	link_shdr = &bin->shdr[shdr->sh_link];
	if (shdr->sh_size < 1) {
 		return false;
 	}
 	Elf_(Verdef) *defs = calloc (shdr->sh_size, sizeof (char));
	if (!defs) {
		return false;
	}
	if (bin->shstrtab && shdr->sh_name < bin->shstrtab_size) {
		section_name = &bin->shstrtab[shdr->sh_name];
	}
	if (link_shdr && bin->shstrtab && link_shdr->sh_name < bin->shstrtab_size) {
		link_section_name = &bin->shstrtab[link_shdr->sh_name];
	}
	if (!defs) {
		bprintf ("Warning: Cannot allocate memory (Check Elf_(Verdef))\n");
		return NULL;
	}
	sdb = sdb_new0 ();
	end = (char *)defs + shdr->sh_size;
	sdb_set (sdb, "section_name", section_name, 0);
	sdb_num_set (sdb, "entries", shdr->sh_info, 0);
	sdb_num_set (sdb, "addr", shdr->sh_addr, 0);
	sdb_num_set (sdb, "offset", shdr->sh_offset, 0);
	sdb_num_set (sdb, "link", shdr->sh_link, 0);
	sdb_set (sdb, "link_section_name", link_section_name, 0);

	for (cnt = 0, i = 0; i >= 0 && cnt < shdr->sh_info && ((char *)defs + i < end); ++cnt) {
		Sdb *sdb_verdef = sdb_new0 ();
		char *vstart = ((char*)defs) + i;
		char key[32] = {0};
		Elf_(Verdef) *verdef = (Elf_(Verdef)*)vstart;
		Elf_(Verdaux) aux = {0};
		int j = 0;
		int isum = 0;

		r_buf_read_at (bin->b, shdr->sh_offset + i, dfs, sizeof (Elf_(Verdef)));
		verdef->vd_version = READ16 (dfs, j)
		verdef->vd_flags = READ16 (dfs, j)
		verdef->vd_ndx = READ16 (dfs, j)
		verdef->vd_cnt = READ16 (dfs, j)
		verdef->vd_hash = READ32 (dfs, j)
		verdef->vd_aux = READ32 (dfs, j)
		verdef->vd_next = READ32 (dfs, j)
		int vdaux = verdef->vd_aux;
		if (vdaux < 1) {
			sdb_free (sdb_verdef);
			goto out_error;
		}
		vstart += vdaux;
		if (vstart > end || vstart + sizeof (Elf_(Verdaux)) > end) {
			sdb_free (sdb_verdef);
			goto out_error;
		}

		j = 0;
		aux.vda_name = READ32 (vstart, j)
		aux.vda_next = READ32 (vstart, j)

		isum = i + verdef->vd_aux;
		if (aux.vda_name > bin->dynstr_size) {
			sdb_free (sdb_verdef);
			goto out_error;
		}

		sdb_num_set (sdb_verdef, "idx", i, 0);
		sdb_num_set (sdb_verdef, "vd_version", verdef->vd_version, 0);
		sdb_num_set (sdb_verdef, "vd_ndx", verdef->vd_ndx, 0);
		sdb_num_set (sdb_verdef, "vd_cnt", verdef->vd_cnt, 0);
		sdb_set (sdb_verdef, "vda_name", &bin->dynstr[aux.vda_name], 0);
		sdb_set (sdb_verdef, "flags", get_ver_flags (verdef->vd_flags), 0);

		for (j = 1; j < verdef->vd_cnt; ++j) {
			int k;
			Sdb *sdb_parent = sdb_new0 ();
			isum += aux.vda_next;
			vstart += aux.vda_next;
			if (vstart > end || vstart + sizeof(Elf_(Verdaux)) > end) {
				sdb_free (sdb_verdef);
				sdb_free (sdb_parent);
				goto out_error;
			}
			k = 0;
			aux.vda_name = READ32 (vstart, k)
			aux.vda_next = READ32 (vstart, k)
			if (aux.vda_name > bin->dynstr_size) {
				sdb_free (sdb_verdef);
				sdb_free (sdb_parent);
				goto out_error;
			}
			sdb_num_set (sdb_parent, "idx", isum, 0);
			sdb_num_set (sdb_parent, "parent", j, 0);
			sdb_set (sdb_parent, "vda_name", &bin->dynstr[aux.vda_name], 0);
			snprintf (key, sizeof (key), "parent%d", j - 1);
			sdb_ns_set (sdb_verdef, key, sdb_parent);
		}

		snprintf (key, sizeof (key), "verdef%d", cnt);
		sdb_ns_set (sdb, key, sdb_verdef);
		if (!verdef->vd_next) {
			sdb_free (sdb_verdef);
			goto out_error;
		}
		if ((st32)verdef->vd_next < 1) {
			eprintf ("Warning: Invalid vd_next in the ELF version\n");
			break;
		}
		i += verdef->vd_next;
	}
	free (defs);
	return sdb;
out_error:
	free (defs);
	sdb_free (sdb);
	return NULL;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.