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| author | Takashi Iwai <tiwai@suse.de> | 2015-12-21 13:46:30 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-12-21 13:46:30 +0300 |
| commit | 1d9d4495001d3c470e5c902ff35a6aa626924fc1 (patch) | |
| tree | 1ae39f4ccadb610bc16fea88a1f93b23a4df37b1 /kernel/bpf/arraymap.c | |
| parent | d3d33aabac51341065bcce0e9c2d9d27902a08c4 (diff) | |
| parent | e2dc7d7d8ed3019f72855af1c3dcda3fb456b488 (diff) | |
| download | linux-1d9d4495001d3c470e5c902ff35a6aa626924fc1.tar.xz | |
Merge branch 'topic/hdmi-jack' into for-next
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; } |