Merge branch 'add-the-missing-bpf_link_type-invocation-for-sockmap'

Merge branch 'add-the-missing-bpf_link_type-invocation-for-sockmap'

Hou Tao says:

====================
Add the missing BPF_LINK_TYPE invocation for sockmap

From: Hou Tao <houtao1@huawei.com>

Hi,

The tiny patch set fixes the out-of-bound read problem when reading the
fdinfo of sock map link fd. And in order to spot such omission early for
the newly-added link type in the future, it also checks the validity of
the link->type and adds a WARN_ONCE() for missed invocation.

Please see individual patches for more details. And comments are always
welcome.

v3:
  * patch #2: check and warn the validity of link->type instead of
    adding a static assertion for bpf_link_type_strs array.

v2: http://lore.kernel.org/bpf/d49fa2f4-f743-c763-7579-c3cab4dd88cb@huaweicloud.com
====================

Link: https://lore.kernel.org/r/20241024013558.1135167-1-houtao@huaweicloud.com
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>