[PATCH net 0/8] IPVS fixes for net

Pablo Neira Ayuso
2026-05-05T00:16:56Z

Hi,

The following batch contains IPVS fixes for net to address issues
from the latest net-next pull request.

Julian Anastasov made the following summary:

1-3) Fixes for the recently added resizable hash tables

4) dest from trash can be leaked if ip_vs_start_estimator() fails

5) fixed races and locking for the estimation kthreads

6) fix for wrong roundup_pow_of_two() usage in the resizable hash
tables

7-8) v2 of the changes from Waiman Long to properly guard against
the housekeeping_cpumask() updates:

https://lore.kernel.org/netfilter-devel/20260331165015.2777765-1-longman@redhat.com/

I added missing Fixes tag. The original description:

Since commit 041ee6f3727a ("kthread: Rely on HK_TYPE_DOMAIN for preferred
affinity management"), the HK_TYPE_KTHREAD housekeeping cpumask may no
longer be correct in showing the actual CPU affinity of kthreads that
have no predefined CPU affinity. As the ipvs networking code is still
using HK_TYPE_KTHREAD, we need to make HK_TYPE_KTHREAD reflect the
reality.

This patch series makes HK_TYPE_KTHREAD an alias of HK_TYPE_DOMAIN
and uses RCU to protect access to the HK_TYPE_KTHREAD housekeeping
cpumask.

Julian plans to post a nf-next patch to limit the connections by using
"conn_max" sysctl. With Simon Horman, they agreed that this is an old
problem that we do not have a limit of connections and it is not a
stopper for this patchset.

Please, pull these changes from:

git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git nf-26-05-05

Thanks.

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

The following changes since commit bd3a4795d5744f59a1f485379f1303e5e606f377:

selftests: tls: add test for data loss on small pipe (2026-05-02 18:27:14 -0700)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git tags/nf-26-05-05

for you to fetch changes up to 8f78b749f3da0f43990490b4c1193b5ede3eec0a:

sched/isolation: Make HK_TYPE_KTHREAD an alias of HK_TYPE_DOMAIN (2026-05-05 01:52:55 +0200)

----------------------------------------------------------------
netfilter pull request 26-05-05

----------------------------------------------------------------
Julian Anastasov (6):
ipvs: fixes for the new ip_vs_status info
ipvs: fix races around the conn_lfactor and svc_lfactor sysctl vars
ipvs: fix the spin_lock usage for RT build
ipvs: do not leak dest after get from dest trash
ipvs: fix races around est_mutex and est_cpulist
ipvs: fix shift-out-of-bounds in ip_vs_rht_desired_size

Waiman Long (2):
ipvs: Guard access of HK_TYPE_KTHREAD cpumask with RCU
sched/isolation: Make HK_TYPE_KTHREAD an alias of HK_TYPE_DOMAIN

include/linux/sched/isolation.h | 6 +-
include/net/ip_vs.h | 31 ++++++--
net/netfilter/ipvs/ip_vs_conn.c | 76 ++++++++++---------
net/netfilter/ipvs/ip_vs_core.c | 2 +-
net/netfilter/ipvs/ip_vs_ctl.c | 164 +++++++++++++++++++++++++++++-----------
net/netfilter/ipvs/ip_vs_est.c | 83 +++++++++++---------
6 files changed, 241 insertions(+), 121 deletions(-)