[ Upstream commit f54ba391 ]
Passing a non-existing flag in the sxdp_flags member of struct
sockaddr_xdp was, incorrectly, silently ignored. This patch addresses
that behavior, and rejects any non-existing flags.
We have examined existing user space code, and to our best knowledge,
no one is relying on the current incorrect behavior. AF_XDP is still
in its infancy, so from our perspective, the risk of breakage is very
low, and addressing this problem now is important.
Fixes: 965a9909 ("xsk: add support for bind for Rx")
Signed-off-by: Björn Töpel <email@example.com>
Signed-off-by: Daniel Borkmann <firstname.lastname@example.org>
Signed-off-by: Sasha Levin <email@example.com>