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From:   Christoph Hellwig <hch@lst.de>
To:     Al Viro <viro@zeniv.linux.org.uk>
Cc:     Arnd Bergmann <arnd@arndb.de>,
        Luis Chamberlain <mcgrof@kernel.org>,
        linux-arm-kernel@lists.infradead.org, x86@kernel.org,
        linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org,
        linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org,
        sparclinux@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: properly support exec and wait with kernel pointers
Date:   Mon, 15 Jun 2020 15:00:26 +0200
Message-Id: <20200615130032.931285-1-hch@lst.de>
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Sender: linux-kernel-owner@vger.kernel.org
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Hi all,

this series first cleans up the exec code and then adds proper
kernel_execveat and kernel_wait callers instead of relying on the fact
that the early init code and kernel threads implicitly run with
the address limit set to KERNEL_DS.

Note that the cleanup removes the compat execve(at) handlers (almost)
entirely, as we can handle the compat difference very nicely in a
unified codebase.  The only exception is x86 where this would list the
handlers twice in the same syscall table due to the messed up x32
design.  I had to add an extra compat handler just for that case, but
maybe someone has a better idea.