[DragonFlyBSD - Bug #2154] vkernel copyout() doesn't return EFAULT on error

[sigttou]

Issue #2154 has been updated by sigttou.

Description updated

`56f3779c91` converts VM errors to `EFAULT` -> close.

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Bug #2154: vkernel copyout() doesn't return EFAULT on error
http://bugs.dragonflybsd.org/issues/2154#change-14746

* Author: vsrinivas
* Status: New
* Priority: Normal
* Target version: 6.4
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copyout() is documented as returning 0 or EFAULT; the vkernel version doesn't do
so, it returns a VM error code, which needs translating.



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