When will getsockname() set ENOBUFS？

When will getsockname() set ENOBUFS？

The manual says getsockname() can set errno to ENOBUFS, but I have checked the related source code inside kernel(3.10, 4.9, 5.2):

• inet_getname
• inet6_getname
• unix_getname
• netlink_getname
• ipx_getname
• move_addr_to_user

None of them return ENOBUFS.

Can anybody tell me if there is anything I was missed?