Re: [patch] remove MNT_NOEXEC check for PROT_EXEC mmaps

From: David Wagner
Date: Mon Sep 25 2006 - 16:12:35 EST

Arjan van de Ven wrote:
>[...] so you remove a security check ... [...]
>If you can mmap PROT_EXEC the "noexec" mount option doesn't mean
>anything! Because a elf binary loader is easily written in
>perl/shell/whatever, the kernel "x" bit is just a convenience there!
>The PROT_EXEC check at least makes it a bit harder to do anything like
>this; not impossible obviously

The last sentence of your post implies that this never was a security
check. (I'll believe it was a check to prevent some kinds of accidental
misbehavior, but I don't believe it prevents deliberate misbehavior.)
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