Messages in this thread | | | Date | Fri, 30 Mar 2012 20:51:20 -0400 (EDT) | Subject | Re: sendmmsg: put_user vs __put_user | From | David Miller <> |
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From: Ulrich Drepper <drepper@gmail.com> Date: Fri, 30 Mar 2012 09:36:11 -0400
> Shouldn't the compat code in the sendmmsg implementation use the same > code as the normal code? In which case you probably want something > like this:
Compat processes are not able to generate virtual addresses anywhere near the range where the kernel resides, so the address range verification done by put_user() is completely superfluous and therefore not necessary. The normal exception handling done by the access is completely sufficient.
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