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Message-ID: <20170510064655.GA4115@infradead.org>
Date: Tue, 9 May 2017 23:46:55 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Kees Cook <keescook@...omium.org>
Cc: Christoph Hellwig <hch@...radead.org>,
	Andy Lutomirski <luto@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Kernel Hardening <kernel-hardening@...ts.openwall.com>,
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	David Howells <dhowells@...hat.com>,
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	"H . Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>,
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	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
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	the arch/x86 maintainers <x86@...nel.org>,
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	"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: Re: Re: [PATCH v9 1/4] syscalls: Verify address
 limit before returning to user-mode

On Tue, May 09, 2017 at 09:50:32AM -0700, Kees Cook wrote:
> http://git.infradead.org/users/hch/vfs.git/commitdiff/018e0e9030777121fe87e89d43066691e7366587
> This accidentally(?) removes the kernel-doc comments.

That was sort of intentional, the kerneldoc boilerplate adds very little
value for method instances.

> http://git.infradead.org/users/hch/vfs.git/commitdiff/78b62c730254fc39fa888cdbdca08fde6e09a798
> Could this be made defensive? (Return 0 if ret wraps, for example?) I
> see what the comment says, but not everyone will read that. :(

It's a straight copy of iov_length, and I'd rather keep it that way.

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