Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address limit before returning to user-mode

Christoph Hellwig
2017-05-10T06:46:55Z

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.