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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2016-01-06 17:31:06 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2016-01-06 17:31:06 -0800 |
| commit | efbc57c0e6a92083fce03927736f5d389182935b (patch) | |
| tree | 2e900ae80abfd296a6f0c0c3a7e6c1ae95ae2705 /kernel/bpf/arraymap.c | |
| parent | 4b1af853646ca893fa686701d1605998fffcc82c (diff) | |
| parent | 57c80e8e5d1cddae0651e5314394e6069ebbbe3c (diff) | |
Merge branch 'goodix' into next
Merge several improvements to Goodix touchscreen driver:
- power management support
- configuration upload
- axis swapping and inversion
Diffstat (limited to 'kernel/bpf/arraymap.c')
| -rw-r--r-- | kernel/bpf/arraymap.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/kernel/bpf/arraymap.c b/kernel/bpf/arraymap.c index 3f4c99e06c6b..b0799bced518 100644 --- a/kernel/bpf/arraymap.c +++ b/kernel/bpf/arraymap.c @@ -28,11 +28,17 @@ static struct bpf_map *array_map_alloc(union bpf_attr *attr) attr->value_size == 0) return ERR_PTR(-EINVAL); + if (attr->value_size >= 1 << (KMALLOC_SHIFT_MAX - 1)) + /* if value_size is bigger, the user space won't be able to + * access the elements. + */ + return ERR_PTR(-E2BIG); + elem_size = round_up(attr->value_size, 8); /* check round_up into zero and u32 overflow */ if (elem_size == 0 || - attr->max_entries > (U32_MAX - sizeof(*array)) / elem_size) + attr->max_entries > (U32_MAX - PAGE_SIZE - sizeof(*array)) / elem_size) return ERR_PTR(-ENOMEM); array_size = sizeof(*array) + attr->max_entries * elem_size; @@ -105,7 +111,7 @@ static int array_map_update_elem(struct bpf_map *map, void *key, void *value, /* all elements already exist */ return -EEXIST; - memcpy(array->value + array->elem_size * index, value, array->elem_size); + memcpy(array->value + array->elem_size * index, value, map->value_size); return 0; } |