cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

bpf_iter_test_kern5.c (653B)

      1// SPDX-License-Identifier: GPL-2.0
      2/* 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}