static int elf_idx(struct user_ta_ctx *utc, vaddr_t r_va, size_t r_size)
{
	struct user_ta_elf *elf;
	int idx = 0;

	TAILQ_FOREACH(elf, &utc->elfs, link) {
		size_t n;

		for (n = 0; n < elf->num_segs; n++)
			if (elf->segs[n].va == r_va &&
			    elf->segs[n].size == r_size)
				return idx;
		idx++;
	}
	return -1;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.