| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| 769 | 96.37% | 2 | 40.00% | |
| 18 | 2.26% | 1 | 20.00% | |
| 8 | 1.00% | 1 | 20.00% | |
| 3 | 0.38% | 1 | 20.00% | |
| Total | 798 | 5 |
| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Alexei Starovoitov | 769 | 96.37% | 2 | 40.00% |
| Eduard Zingerman | 18 | 2.26% | 1 | 20.00% |
| Puranjay Mohan | 8 | 1.00% | 1 | 20.00% |
| Daniel Xu | 3 | 0.38% | 1 | 20.00% |
| Total | 798 | 5 |
// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */ #define BPF_NO_KFUNC_PROTOTYPES #include <vmlinux.h> #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> #include "bpf_misc.h" #include "bpf_experimental.h" #include "bpf_arena_common.h" struct { __uint(type, BPF_MAP_TYPE_ARENA); __uint(map_flags, BPF_F_MMAPABLE); __uint(max_entries, 2); /* arena of two pages close to 32-bit boundary*/ #ifdef __TARGET_ARCH_arm64 __ulong(map_extra, (1ull << 32) | (~0u - __PAGE_SIZE * 2 + 1)); /* start of mmap() region */ #else __ulong(map_extra, (1ull << 44) | (~0u - __PAGE_SIZE * 2 + 1)); /* start of mmap() region */ #endif } arena SEC(".maps"); SEC("syscall") __success __retval(0) int basic_alloc1(void *ctx) { #if defined(__BPF_FEATURE_ADDR_SPACE_CAST) volatile int __arena *page1, *page2, *no_page, *page3; page1 = bpf_arena_alloc_pages(&arena, NULL, 1, NUMA_NO_NODE, 0); if (!page1) return 1; *page1 = 1; page2 = bpf_arena_alloc_pages(&arena, NULL, 1, NUMA_NO_NODE, 0); if (!page2) return 2; *page2 = 2; no_page = bpf_arena_alloc_pages(&arena, NULL, 1, NUMA_NO_NODE, 0); if (no_page) return 3; if (*page1 != 1) return 4; if (*page2 != 2) return 5; bpf_arena_free_pages(&arena, (void __arena *)page2, 1); if (*page1 != 1) return 6; if (*page2 != 0) /* use-after-free should return 0 */ return 7; page3 = bpf_arena_alloc_pages(&arena, NULL, 1, NUMA_NO_NODE, 0); if (!page3) return 8; *page3 = 3; if (page2 != page3) return 9; if (*page1 != 1) return 10; #endif return 0; } SEC("syscall") __success __retval(0) int basic_alloc2(void *ctx) { #if defined(__BPF_FEATURE_ADDR_SPACE_CAST) volatile char __arena *page1, *page2, *page3, *page4; page1 = bpf_arena_alloc_pages(&arena, NULL, 2, NUMA_NO_NODE, 0); if (!page1) return 1; page2 = page1 + __PAGE_SIZE; page3 = page1 + __PAGE_SIZE * 2; page4 = page1 - __PAGE_SIZE; *page1 = 1; *page2 = 2; *page3 = 3; *page4 = 4; if (*page1 != 1) return 1; if (*page2 != 2) return 2; if (*page3 != 0) return 3; if (*page4 != 0) return 4; bpf_arena_free_pages(&arena, (void __arena *)page1, 2); if (*page1 != 0) return 5; if (*page2 != 0) return 6; if (*page3 != 0) return 7; if (*page4 != 0) return 8; #endif return 0; } struct bpf_arena___l { struct bpf_map map; } __attribute__((preserve_access_index)); SEC("syscall") __success __retval(0) __log_level(2) int basic_alloc3(void *ctx) { struct bpf_arena___l *ar = (struct bpf_arena___l *)&arena; volatile char __arena *pages; pages = bpf_arena_alloc_pages(&ar->map, NULL, ar->map.max_entries, NUMA_NO_NODE, 0); if (!pages) return 1; return 0; } SEC("iter.s/bpf_map") __success __log_level(2) int iter_maps1(struct bpf_iter__bpf_map *ctx) { struct bpf_map *map = ctx->map; if (!map) return 0; bpf_arena_alloc_pages(map, NULL, map->max_entries, 0, 0); return 0; } SEC("iter.s/bpf_map") __failure __msg("expected pointer to STRUCT bpf_map") int iter_maps2(struct bpf_iter__bpf_map *ctx) { struct seq_file *seq = ctx->meta->seq; bpf_arena_alloc_pages((void *)seq, NULL, 1, 0, 0); return 0; } SEC("iter.s/bpf_map") __failure __msg("untrusted_ptr_bpf_map") int iter_maps3(struct bpf_iter__bpf_map *ctx) { struct bpf_map *map = ctx->map; if (!map) return 0; bpf_arena_alloc_pages(map->inner_map_meta, NULL, map->max_entries, 0, 0); return 0; } char _license[] SEC("license") = "GPL";