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1// SPDX-License-Identifier: GPL-2.02/* Copyright (c) 2020 Facebook */3#include "bpf_iter.h"4#include <bpf/bpf_helpers.h>5#include <bpf/bpf_tracing.h>6 7char _license[] SEC("license") = "GPL";8 9struct key_t {10 int a;11 int b;12 int c;13};14 15struct {16 __uint(type, BPF_MAP_TYPE_HASH);17 __uint(max_entries, 3);18 __type(key, struct key_t);19 __type(value, __u64);20} hashmap1 SEC(".maps");21 22__u32 key_sum = 0;23 24SEC("iter/bpf_map_elem")25int dump_bpf_hash_map(struct bpf_iter__bpf_map_elem *ctx)26{27 void *key = ctx->key;28 29 if (key == (void *)0)30 return 0;31 32 /* out of bound access w.r.t. hashmap1 */33 key_sum += *(__u32 *)(key + sizeof(struct key_t));34 return 0;35}36