Messages in this thread | | | Date | Thu, 27 Aug 1998 10:54:00 +1200 | From | Chris Wedgwood <> | Subject | Re: copy_from_user() fix |
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On Wed, Aug 26, 1998 at 04:17:34AM -0700, David S. Miller wrote:
> Consider a userland pointer verification library that worked in > about 10 lines of code by passing the pointer in question to a > sys_write() call to /dev/null... but this wouldn't work actually > these days due to how the kernel won't even verify the pointer in > this case.
Ooo... nice hack.
You could probably implement this by reading /proc/self/maps anyhow, it would be several orders of magnitude slower than your suggestion though.
-cw
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