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| author | Thomas Gleixner <tglx@linutronix.de> | 2020-06-11 15:17:57 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-06-11 15:17:57 +0200 |
| commit | f77d26a9fc525286bcef3d4f98b52e17482cf49c (patch) | |
| tree | 6b179c9aa84787773cb601a14a64255e2912154b /kernel/bpf/arraymap.c | |
| parent | b6bea24d41519e8c31e4798f1c1a3f67e540c5d0 (diff) | |
| parent | f0178fc01fe46bab6a95415f5647d1a74efcad1b (diff) | |
| download | linux-f77d26a9fc525286bcef3d4f98b52e17482cf49c.tar.bz2 | |
Merge branch 'x86/entry' into ras/core
to fixup conflicts in arch/x86/kernel/cpu/mce/core.c so MCE specific follow
up patches can be applied without creating a horrible merge conflict
afterwards.
Diffstat (limited to 'kernel/bpf/arraymap.c')
| -rw-r--r-- | kernel/bpf/arraymap.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/kernel/bpf/arraymap.c b/kernel/bpf/arraymap.c index 95d77770353c..11584618e861 100644 --- a/kernel/bpf/arraymap.c +++ b/kernel/bpf/arraymap.c @@ -77,7 +77,7 @@ static struct bpf_map *array_map_alloc(union bpf_attr *attr) bool percpu = attr->map_type == BPF_MAP_TYPE_PERCPU_ARRAY; int ret, numa_node = bpf_map_attr_numa_node(attr); u32 elem_size, index_mask, max_entries; - bool unpriv = !capable(CAP_SYS_ADMIN); + bool bypass_spec_v1 = bpf_bypass_spec_v1(); u64 cost, array_size, mask64; struct bpf_map_memory mem; struct bpf_array *array; @@ -95,7 +95,7 @@ static struct bpf_map *array_map_alloc(union bpf_attr *attr) mask64 -= 1; index_mask = mask64; - if (unpriv) { + if (!bypass_spec_v1) { /* round up array size to nearest power of 2, * since cpu will speculate within index_mask limits */ @@ -149,7 +149,7 @@ static struct bpf_map *array_map_alloc(union bpf_attr *attr) return ERR_PTR(-ENOMEM); } array->index_mask = index_mask; - array->map.unpriv_array = unpriv; + array->map.bypass_spec_v1 = bypass_spec_v1; /* copy mandatory map attributes */ bpf_map_init_from_attr(&array->map, attr); @@ -219,7 +219,7 @@ static u32 array_map_gen_lookup(struct bpf_map *map, struct bpf_insn *insn_buf) *insn++ = BPF_ALU64_IMM(BPF_ADD, map_ptr, offsetof(struct bpf_array, value)); *insn++ = BPF_LDX_MEM(BPF_W, ret, index, 0); - if (map->unpriv_array) { + if (!map->bypass_spec_v1) { *insn++ = BPF_JMP_IMM(BPF_JGE, ret, map->max_entries, 4); *insn++ = BPF_ALU32_IMM(BPF_AND, ret, array->index_mask); } else { @@ -486,7 +486,12 @@ static int array_map_mmap(struct bpf_map *map, struct vm_area_struct *vma) if (!(map->map_flags & BPF_F_MMAPABLE)) return -EINVAL; - return remap_vmalloc_range(vma, array_map_vmalloc_addr(array), pgoff); + if (vma->vm_pgoff * PAGE_SIZE + (vma->vm_end - vma->vm_start) > + PAGE_ALIGN((u64)array->map.max_entries * array->elem_size)) + return -EINVAL; + + return remap_vmalloc_range(vma, array_map_vmalloc_addr(array), + vma->vm_pgoff + pgoff); } const struct bpf_map_ops array_map_ops = { @@ -1053,7 +1058,7 @@ static u32 array_of_map_gen_lookup(struct bpf_map *map, *insn++ = BPF_ALU64_IMM(BPF_ADD, map_ptr, offsetof(struct bpf_array, value)); *insn++ = BPF_LDX_MEM(BPF_W, ret, index, 0); - if (map->unpriv_array) { + if (!map->bypass_spec_v1) { *insn++ = BPF_JMP_IMM(BPF_JGE, ret, map->max_entries, 6); *insn++ = BPF_ALU32_IMM(BPF_AND, ret, array->index_mask); } else { |