netdev - 5.18 breaks Android net test PFKEY AddSA test case

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Message-ID: <CANP3RGcW6DWei2bXrAQn8B4Uf0ggx_MgEfVyX_D7AaYZcYOchQ@mail.gmail.com>
Date:   Sat, 28 May 2022 01:54:25 -0700
From:   Maciej Żenczykowski <maze@...gle.com>
To:     Steffen Klassert <steffen.klassert@...unet.com>
Cc:     Linux NetDev <netdev@...r.kernel.org>,
        Benedict Wong <benedictwong@...gle.com>,
        Yan Yan <evitayan@...gle.com>
Subject: 5.18 breaks Android net test PFKEY AddSA test case

I've not gotten to the bottom of the root cause, since I'm hoping
someone will know off the top of their head,
why this might now be broken...

##### ./pf_key_test.py (13/25)

E
======================================================================
ERROR: testAddDelSa (__main__.PfKeyTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "./pf_key_test.py", line 42, in testAddDelSa
    pf_key.SADB_X_AALG_SHA2_256HMAC, ENCRYPTION_KEY)
  File "/aosp-tests/net/test/pf_key.py", line 254, in AddSa
    self.SendAndRecv(msg, self.PackPfKeyExtensions(extlist))
  File "/aosp-tests/net/test/pf_key.py", line 218, in SendAndRecv
    return self.Recv()
  File "/aosp-tests/net/test/pf_key.py", line 208, in Recv
    raise OSError(msg.errno, os.strerror(msg.errno))
OSError: [Errno 3] No such process

The failure is at
  https://cs.android.com/android/platform/superproject/+/master:kernel/tests/net/test/pf_key_test.py;l=42
ie.

ENCRYPTION_KEY =
("308146eb3bd84b044573d60f5a5fd15957c7d4fe567a2120f35bae0f9869ec22".decode("hex"))

src4 = csocket.Sockaddr(("192.0.2.1", 0))
dst4 = csocket.Sockaddr(("192.0.2.2", 1))
self.pf_key.AddSa(src4, dst4, 0xdeadbeef, pf_key.SADB_TYPE_ESP,
pf_key.IPSEC_MODE_TRANSPORT, 54321,
pf_key.SADB_X_EALG_AESCBC, ENCRYPTION_KEY,
pf_key.SADB_X_AALG_SHA2_256HMAC, ENCRYPTION_KEY)

Thanks,
Maciej