Re: [patch] remove MNT_NOEXEC check for PROT_EXEC mmaps

Ulrich Drepper wrote:

The consensus has been to add the same checks to mprotect.  They were
not left out intentionally.

But how about the anonymous mmap with PROT_EXEC set?
This is exactly what the malicious loader will do, it
won't do the shared (or private) file-backed mmap.
So your technique doesn't restrict the malicious
loaders, including the potential script loader you
were referring to. It doesn't even make their life
any harder. Only the properly-written programs suffer.
Or, in case of ceasing to use noexec - the security.

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