Messages in this thread | | | Date | Mon, 11 Mar 2013 14:04:51 -0700 | Subject | Re: [PATCH] drm/i915: clarify reasoning for the access_ok call | From | Kees Cook <> |
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On Mon, Mar 11, 2013 at 1:51 PM, Chris Wilson <chris@chris-wilson.co.uk> wrote: > On Mon, Mar 11, 2013 at 12:26:30PM -0700, Kees Cook wrote: >> This clarifies the comment above the access_ok check so a missing >> VERIFY_READ doesn't alarm anyone. > > Do we really need to copy the interface documentation? > > /** > * access_ok: - Checks if a user space pointer is valid > * @type: Type of access: %VERIFY_READ or %VERIFY_WRITE. Note that > * %VERIFY_WRITE is a superset of %VERIFY_READ - if it is safe > * to write to a block, it is always safe to read from it. > * @addr: User space pointer to start of block to check > * @size: Size of block to check > */ > -Chris
Probably not. It just seemed like the existing comment was insufficient after the removal of the redundant VERIFY_READ check that happened recently.
-Kees
-- Kees Cook Chrome OS Security
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