ipv6: sr: fix possible use-after-free and null-ptr-deref

stable inclusion
from stable-v4.19.308
commit 953f42934533c151f440cd32390044d2396b87aa
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9E3E4
CVE: CVE-2024-26735

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=953f42934533c151f440cd32390044d2396b87aa



---------------------------

[ Upstream commit 5559cea2d5aa3018a5f00dd2aca3427ba09b386b ]

The pernet operations structure for the subsystem must be registered
before registering the generic netlink family.

Fixes: 915d7e5e ("ipv6: sr: add code base for control plane support of SR-IPv6")
Signed-off-by: Vasiliy Kovalev <kovalev@altlinux.org>
Link: https://lore.kernel.org/r/20240215202717.29815-1-kovalev@altlinux.org


Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Liu Jian <liujian56@huawei.com>