diff options
| author | Roman Gushchin <guro@fb.com> | 2019-05-29 18:03:59 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2019-05-31 16:52:56 -0700 |
| commit | c85d69135a9175c50a823d04d62d932312d037b3 (patch) | |
| tree | edd6ec707ebbf68a89fc1c3fc2b2d06364978ad3 /kernel/bpf/hashtab.c | |
| parent | b936ca643ade11f265fa10e5fb71c20d9c5243f1 (diff) | |
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/hashtab.c')
| -rw-r--r-- | kernel/bpf/hashtab.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/kernel/bpf/hashtab.c b/kernel/bpf/hashtab.c index b0bdc7b040ad..d92e05d9979b 100644 --- a/kernel/bpf/hashtab.c +++ b/kernel/bpf/hashtab.c @@ -360,13 +360,8 @@ static struct bpf_map *htab_map_alloc(union bpf_attr *attr) else cost += (u64) htab->elem_size * num_possible_cpus(); - if (cost >= U32_MAX - PAGE_SIZE) - /* make sure page count doesn't overflow */ - goto free_htab; - /* if map size is larger than memlock limit, reject it */ - err = bpf_map_charge_init(&htab->map.memory, - round_up(cost, PAGE_SIZE) >> PAGE_SHIFT); + err = bpf_map_charge_init(&htab->map.memory, cost); if (err) goto free_htab; |