| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | /* Copyright (c) 2020 Facebook */ |
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| 3 | #include "bpf_iter.h" |
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| 4 | #include <bpf/bpf_helpers.h> |
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| 5 | #include <bpf/bpf_tracing.h> |
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| 6 | |
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| 7 | char _license[] SEC("license" ) = "GPL" ; |
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| 8 | |
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| 9 | struct key_t { |
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| 10 | int a; |
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| 11 | int b; |
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| 12 | int c; |
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| 13 | }; |
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| 14 | |
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| 15 | struct { |
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| 16 | __uint(type, BPF_MAP_TYPE_HASH); |
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| 17 | __uint(max_entries, 3); |
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| 18 | __type(key, struct key_t); |
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| 19 | __type(value, __u64); |
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| 20 | } hashmap1 SEC(".maps" ); |
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| 21 | |
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| 22 | __u32 key_sum = 0; |
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| 23 | |
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| 24 | SEC("iter/bpf_map_elem" ) |
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| 25 | int dump_bpf_hash_map(struct bpf_iter__bpf_map_elem *ctx) |
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| 26 | { |
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| 27 | void *key = ctx->key; |
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| 28 | |
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| 29 | if (key == (void *)0) |
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| 30 | return 0; |
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| 31 | |
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| 32 | /* out of bound access w.r.t. hashmap1 */ |
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| 33 | key_sum += *(__u32 *)(key + sizeof(struct key_t)); |
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| 34 | return 0; |
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| 35 | } |
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| 36 | |
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