Re: PATCH [bugfix for pipe(2) system call]

Jamie Lokier (lkd@tantalophile.demon.co.uk)
Wed, 1 Dec 1999 22:07:33 +0100

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David Howells wrote:
> I think we should just use the __copy* variants, and nothing
> else. These check sufficiently (using the CPU exception mechanism, and
> nothing else).

No they don't: they don't catch pipe(0xc0000000) for example.
It's because kernel code writing to kernel pages is not an exception.

-- Jamie

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