[Libreoffice-bugs] [Bug 134003] Vtablefactory violates W^X security principle

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=134003

--- Comment #2 from Stephan Bergmann <sbergman at redhat.com> ---
You do not state your operating system or the provenance of your LibreOffice
installation at /usr/lib64/libreoffice/.  I'll assume some Linux distribution. 
(Or, for that matter, any other environment that defines USE_DOUBLE_MMAP in
bridges/inc/vtablefactory.hxx.)

The behavior you observe is a consequence of
<https://git.libreoffice.org/core/+/8b9968a26265facaf5e761485d750ce9cedab3ab%5E!/>
"fdo#72755: Only use double mmap as fallback" fixing bug 72755.  The code now
first tries to create an anonymous memory area that is both writeable and
executable, and only if that fails (because it is prohibited by the system's
security settings) does it fall back to a shared memory area that is mmap'ed
once as writeable and once as executable.

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