[PATCH 0/9] pull request (net): ipsec 2026-05-27

[Steffen Klassert <steffen.klassert@secunet.com>]

1) xfrm: route MIGRATE notifications to caller's netns
   Thread the caller's netns through km_migrate() so that
   MIGRATE notifications go to the issuing netns, fixing both the
   init_net listener leak and MOBIKE notifications inside
   non-init netns. From Maoyi Xie.

2) xfrm: ipcomp: Free destination pages on acomp errors
   Move the out_free_req label up so that allocated destination
   pages are released on decompression errors, not only on success.
   From Herbert Xu.

3) xfrm: Check for underflow in xfrm_state_mtu
   Reject configurations that cause xfrm_state_mtu() to underflow,
   preventing a negative TFCPAD value from becoming a memset size
   that triggers an out-of-bounds write of several terabytes.
   From David Ahern.

4) xfrm: ah: use skb_to_full_sk in async output callbacks
   Convert the possibly-incomplete skb->sk to a full socket pointer
   in async AH callbacks so that a request_sock or timewait_sock
   never reaches xfrm_output_resume() downstream consumers.
   From Michael Bommarito.

5) esp: fix page frag reference leak on skb_to_sgvec failure
   When the destination scatterlist build fails after old frags were
   already captured into the source sg, release those old page
   references before jumping to error_free to avoid leaking pages.
   From Alessandro Schino.

6) xfrm: esp: restore combined single-frag length gate
   Check the aligned post-trailer combined length against a page limit
   in the fast path, preventing skb_page_frag_refill() from falling
   back to a page too small for the destination scatterlist.
   From Jingguo Tan.

7) xfrm: iptfs: reset runtime state when cloning SAs
   Reinitialise the clone's mode_data runtime objects before
   publishing it, preventing queued skbs from being freed with
   list state copied from the original SA when migration fails.
   From Shaomin Chen.

8) xfrm: move policy_bydst RCU sync from per-netns .exit to .pre_exit
   Flush policy tables and drain the workqueue in a .pre_exit handler
   so that cleanup_net() pays one RCU grace period per batch instead
   of one per namespace, fixing stalls at high CLONE_NEWNET rates.
   From Usama Arif.

9) xfrm: input: hold netns during deferred transport reinjection
   Take a netns reference when queueing deferred transport reinjection
   work and drop it after the callback completes, keeping the skb->cb
   net pointer valid until the deferred work runs.
   From Zhengchuan Liang.

Please pull or let me know if there are problems.

Thanks!

The following changes since commit b266bacba796ff5c4dcd2ae2fc08aacf7ab39153:

  net: ethernet: cortina: Drop half-assembled SKB (2026-05-06 18:43:41 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec.git tags/ipsec-2026-05-27

for you to fetch changes up to c16f74dc1d75d0e2e7670076d5375deda110ebeb:

  xfrm: input: hold netns during deferred transport reinjection (2026-05-26 10:35:30 +0200)

----------------------------------------------------------------
ipsec-2026-05-27

----------------------------------------------------------------
David Ahern (1):
      xfrm: Check for underflow in xfrm_state_mtu

Herbert Xu (1):
      xfrm: ipcomp: Free destination pages on acomp errors

Jingguo Tan (1):
      xfrm: esp: restore combined single-frag length gate

Maoyi Xie (1):
      xfrm: route MIGRATE notifications to caller's netns

Michael Bommarito (1):
      xfrm: ah: use skb_to_full_sk in async output callbacks

Shaomin Chen (1):
      xfrm: iptfs: reset runtime state when cloning SAs

Usama Arif (1):
      xfrm: move policy_bydst RCU sync from per-netns .exit to .pre_exit

Zhengchuan Liang (1):
      xfrm: input: hold netns during deferred transport reinjection

e521588 (1):
      esp: fix page frag reference leak on skb_to_sgvec failure

 include/net/xfrm.h     |  3 ++-
 net/ipv4/ah4.c         |  2 +-
 net/ipv4/esp4.c        | 16 +++++++++-------
 net/ipv6/ah6.c         |  2 +-
 net/ipv6/esp6.c        | 16 +++++++++-------
 net/key/af_key.c       |  6 +++---
 net/xfrm/xfrm_input.c  | 16 ++++++++++++----
 net/xfrm/xfrm_ipcomp.c | 12 ++++++++----
 net/xfrm/xfrm_iptfs.c  | 28 +++++++++++++++++++++++-----
 net/xfrm/xfrm_policy.c | 17 +++++++++--------
 net/xfrm/xfrm_state.c  | 23 ++++++++++++++++++-----
 net/xfrm/xfrm_user.c   |  5 ++---
 12 files changed, 97 insertions(+), 49 deletions(-)