[PATCH net 0/2] tcp: initialize missing request_sock fields in syncookie path

[Thaison Phan <thaisonphan@google.com>]

Initialize missing request_sock fields for TCP connections accepted via
SYN cookies, where cookie_tcp_reqsk_alloc() and
bpf_sk_assign_tcp_reqsk() allocate without __GFP_ZERO:

- Patch 1 initializes ireq->ir_rmt_addr and ireq->ir_loc_addr to
  LOOPBACK4_IPV6 in cookie_v6_check(), matching tcp_v6_init_req().
- Patch 2 initializes the AccECN request_sock fields in
  cookie_tcp_reqsk_init() and sets syn_ect_snt in cookie_{v4,v6}_check(),
  matching tcp_openreq_init() and tcp_{v4,v6}_send_synack().

An AI coding assistant helped audit the request_sock initialization
paths, write the QEMU reproducer, and draft the changelogs.

Thaison Phan (2):
  tcp: initialize ir_rmt_addr and ir_loc_addr in cookie_v6_check()
  tcp: accecn: initialize AccECN fields in syncookie path

 net/ipv4/syncookies.c | 5 +++++
 net/ipv6/syncookies.c | 4 ++++
 2 files changed, 9 insertions(+)


base-commit: 19ec8416a76c08326fe5f814410a1b43046e63be
-- 
2.56.0.611.g1030f0b940-goog