linux-kernel - inherit TAINT_PROPRIETARY

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Message-Id: <20200729062711.13016-1-hch@lst.de>
Date:   Wed, 29 Jul 2020 08:27:04 +0200
From:   Christoph Hellwig <hch@....de>
To:     Jessica Yu <jeyu@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org (open list)
Subject: inherit TAINT_PROPRIETARY_MODULE

Hi Jessica,

we've had a bug in our resolution of _GPL modules since day one, that
is a module can claim to be GPL licensed and use _GPL exports, while
it also depends on symbols from non-GPL modules.  This is used as a
circumvention of the _GPL exports by using a small shim module using
the _GPL exports and the other functionality.  A recent example can
be found here:

    https://lore.kernel.org/netdev/6376CA34-BC6F-45DE-9FFD-7E32664C7569@fb.com/T/#md514322fdfa212afe9f1d3eb4e5f7eaefece36eb

Diffstat:
 include/linux/module.h |   24 ++----------------------
 kernel/module.c        |   42 +++++++++++++++++++++++++++---------------
 2 files changed, 29 insertions(+), 37 deletions(-)