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| author | Roman Gushchin <guro@fb.com> | 2019-05-30 04:03:59 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2019-06-01 02:52:56 +0300 |
| commit | c85d69135a9175c50a823d04d62d932312d037b3 (patch) | |
| tree | edd6ec707ebbf68a89fc1c3fc2b2d06364978ad3 /kernel/bpf/stackmap.c | |
| parent | b936ca643ade11f265fa10e5fb71c20d9c5243f1 (diff) | |
| download | linux-c85d69135a9175c50a823d04d62d932312d037b3.tar.xz | |
bpf: move memory size checks to bpf_map_charge_init()
Most bpf map types doing similar checks and bytes to pages
conversion during memory allocation and charging.
Let's unify these checks by moving them into bpf_map_charge_init().
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/bpf/stackmap.c')
| -rw-r--r-- | kernel/bpf/stackmap.c | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/kernel/bpf/stackmap.c b/kernel/bpf/stackmap.c index 8da24ca65d97..3d86072d8e32 100644 --- a/kernel/bpf/stackmap.c +++ b/kernel/bpf/stackmap.c @@ -117,14 +117,8 @@ static struct bpf_map *stack_map_alloc(union bpf_attr *attr) n_buckets = roundup_pow_of_two(attr->max_entries); cost = n_buckets * sizeof(struct stack_map_bucket *) + sizeof(*smap); - if (cost >= U32_MAX - PAGE_SIZE) - return ERR_PTR(-E2BIG); cost += n_buckets * (value_size + sizeof(struct stack_map_bucket)); - if (cost >= U32_MAX - PAGE_SIZE) - return ERR_PTR(-E2BIG); - - err = bpf_map_charge_init(&mem, - round_up(cost, PAGE_SIZE) >> PAGE_SHIFT); + err = bpf_map_charge_init(&mem, cost); if (err) return ERR_PTR(err); |