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bpf: devmap: remove unnecessary value size check 

In the devmap alloc map logic we check to ensure that the sizeof the
values are not greater than KMALLOC_MAX_SIZE. But, in the dev map case
we ensure the value size is 4bytes earlier in the function because all
values should be netdev ifindex values.

The second check is harmless but is not needed so remove it.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John Fastabend 2017-08-15 23:35:12 -07:00 committed by David S. Miller
parent ef70f9a22d
commit cf9d014059
1 changed files with 0 additions and 6 deletions
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6
kernel/bpf/devmap.c
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@ -83,12 +83,6 @@ static struct bpf_map *dev_map_alloc(union bpf_attr *attr)
attr->value_size != 4 || attr->map_flags)
return ERR_PTR(-EINVAL);
/* if value_size is bigger, the user space won't be able to
* access the elements.
*/
if (attr->value_size > KMALLOC_MAX_SIZE)
return ERR_PTR(-E2BIG);
dtab = kzalloc(sizeof(*dtab), GFP_USER);
if (!dtab)
return ERR_PTR(-ENOMEM);