On Fri, Oct 30, 2020 at 02:26:33PM +0100, Petr Malat wrote:

Commit 978aa0474115 ("sctp: fix some type cast warnings introduced since
very beginning")' broke err reading from sctp_arg, because it reads the
value as 32-bit integer, although the value is stored as 16-bit integer.
Later this value is passed to the userspace in 16-bit variable, thus the
user always gets 0 on big-endian platforms. Fix it by reading the __u16
field of sctp_arg union, as reading err field would produce a sparse
warning.

Makes sense.

Signed-off-by: Petr Malat <redacted>

Then, it also needs:
Fixes: 978aa0474115 ("sctp: fix some type cast warnings introduced since very beginning")'

Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
(If the maintainers can't add the Fixes tag above, please keep the ack
on the v2)

Thanks.