From: Christoph Hellwig <hch@lst.de>
To: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
Arnd Bergmann <arnd@arndb.de>,
linux-parisc@vger.kernel.org, x86@kernel.org,
linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org,
Luis Chamberlain <mcgrof@kernel.org>,
sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-arm-kernel@lists.infradead.org
Subject: properly support exec and wait with kernel pointers
Date: Mon, 15 Jun 2020 15:00:26 +0200 [thread overview]
Message-ID: <20200615130032.931285-1-hch@lst.de> (raw)
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.
next reply other threads:[~2020-06-15 13:41 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-15 13:00 Christoph Hellwig [this message]
2020-06-15 13:00 ` [PATCH 1/6] exec: cleanup the execve wrappers Christoph Hellwig
2020-06-15 13:00 ` [PATCH 2/6] exec: simplify the compat syscall handling Christoph Hellwig
2020-06-15 13:31 ` Arnd Bergmann
2020-06-15 14:12 ` Christoph Hellwig
2020-06-15 14:40 ` Arnd Bergmann
2020-06-15 14:43 ` Christoph Hellwig
2020-06-15 14:46 ` Arnd Bergmann
2020-06-15 15:09 ` Christoph Hellwig
2020-06-15 15:33 ` Brian Gerst
2020-06-15 16:41 ` Christoph Hellwig
2020-06-15 14:48 ` Brian Gerst
2020-06-15 18:47 ` Arnd Bergmann
2020-06-15 19:45 ` Brian Gerst
2020-06-15 13:00 ` [PATCH 3/6] exec: cleanup the count() function Christoph Hellwig
2020-06-15 13:00 ` [PATCH 4/6] exec: split prepare_arg_pages Christoph Hellwig
2020-06-15 13:00 ` [PATCH 5/6] exec: add a kernel_execveat helper Christoph Hellwig
2020-06-15 13:00 ` [PATCH 6/6] kernel: add a kernel_wait helper Christoph Hellwig
2020-06-15 13:42 ` properly support exec and wait with kernel pointers Arnd Bergmann
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