iproute2's own netlink library asserts that the sockaddr sender pid
has to be the one of the kernel [0]. It also doesn't bail out on pid
mismatch but only skips the message instead. We've seen cases where
the latter had a pid 0; in such case we should skip to the next nl
message instead of hard bail out.
[0] https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/tree/lib/libnetlink.c
rtnl_dump_filter_l(), __rtnl_talk_iov()
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This test spawns a go routine that subscribe for some
events while the main thread will close the socket.
The go routine will returns after 5s when the timetout
on the recv fires and the fd is actually == -1
Signed-off-by: Flavio Crisciani <flavio.crisciani@docker.com>
Daniel Borkmann
Ian Bishop
Flavio Crisciani
Vishvananda Ishaya Abrams