netdev - [xfrm, backport request] Request backport of e2612cd496e7

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Message-ID: <CANrj0bbjjtczU=Bk86y4hn=BX0pc0SQtKDLVwBJ4jihcC9JU2Q@mail.gmail.com>
Date:   Tue, 5 Feb 2019 13:59:26 -0800
From:   Benedict Wong <benedictwong@...gle.com>
To:     netdev@...r.kernel.org
Cc:     Nathan Harold <nharold@...gle.com>,
        Lorenzo Colitti <lorenzo@...gle.com>,
        Steffen Klassert <steffen.klassert@...unet.com>,
        Maciej Żenczykowski <maze@...gle.com>,
        Eyal Birger <eyal.birger@...il.com>, tobias@...ongswan.org
Subject: [xfrm, backport request] Request backport of e2612cd496e7 - set-mark
 backwards compatibility

I propose backporting commit e2612cd496e7 ("xfrm: Make set-mark default
behavior backward compatible") to 4.19 and 4.20 kernels to fix a backwards
compatibility bug introduced in 9b42c1f179a6 (“xfrm: Extend the
output_mark to support input direction and masking”).

The fix is small, relatively simple, and has unit tests. :)

Without this change, systems using mark-based routing on 4.19 or 4.20
kernels will by fail to route IPsec tunnel mode packets correctly in the
default case. This specifically affects Android devices.

Thanks.