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-rw-r--r--kernel/bpf/hashtab.c14
1 files changed, 5 insertions, 9 deletions
diff --git a/kernel/bpf/hashtab.c b/kernel/bpf/hashtab.c
index 0f2708fde5f7..d92e05d9979b 100644
--- a/kernel/bpf/hashtab.c
+++ b/kernel/bpf/hashtab.c
@@ -360,14 +360,8 @@ static struct bpf_map *htab_map_alloc(union bpf_attr *attr)
360 else 360 else
361 cost += (u64) htab->elem_size * num_possible_cpus(); 361 cost += (u64) htab->elem_size * num_possible_cpus();
362 362
363 if (cost >= U32_MAX - PAGE_SIZE) 363 /* if map size is larger than memlock limit, reject it */
364 /* make sure page count doesn't overflow */ 364 err = bpf_map_charge_init(&htab->map.memory, cost);
365 goto free_htab;
366
367 htab->map.pages = round_up(cost, PAGE_SIZE) >> PAGE_SHIFT;
368
369 /* if map size is larger than memlock limit, reject it early */
370 err = bpf_map_precharge_memlock(htab->map.pages);
371 if (err) 365 if (err)
372 goto free_htab; 366 goto free_htab;
373 367
@@ -376,7 +370,7 @@ static struct bpf_map *htab_map_alloc(union bpf_attr *attr)
376 sizeof(struct bucket), 370 sizeof(struct bucket),
377 htab->map.numa_node); 371 htab->map.numa_node);
378 if (!htab->buckets) 372 if (!htab->buckets)
379 goto free_htab; 373 goto free_charge;
380 374
381 if (htab->map.map_flags & BPF_F_ZERO_SEED) 375 if (htab->map.map_flags & BPF_F_ZERO_SEED)
382 htab->hashrnd = 0; 376 htab->hashrnd = 0;
@@ -409,6 +403,8 @@ free_prealloc:
409 prealloc_destroy(htab); 403 prealloc_destroy(htab);
410free_buckets: 404free_buckets:
411 bpf_map_area_free(htab->buckets); 405 bpf_map_area_free(htab->buckets);
406free_charge:
407 bpf_map_charge_finish(&htab->map.memory);
412free_htab: 408free_htab:
413 kfree(htab); 409 kfree(htab);
414 return ERR_PTR(err); 410 return ERR_PTR(err);