Re: [PATCH v9] Add getentropy, getrandom, <sys/random.h> [BZ #17252]

[Joseph Myers <joseph at codesourcery dot com>]

On Tue, 6 Dec 2016, Zack Weinberg wrote:

> On the assumption that this _is_ the issue, I am going to write a script
> that scans the Debian archive for existing binaries containing
> definitions (exported or not) of getentropy and/or getrandom, and will
> report what it tells me -- this will probably take a couple days to
> cycle all the way through.

You can't generally tell for a stripped executable whether there's a 
getentropy function in there - only if it's unstripped, or linked with 
-rdynamic, or linked with glibc that defines getentropy and so exports it 
in the dynamic symbol table for that reason.  You could scan shared 
libraries for bogus exports, but I don't see how you could test for 
executables that would cause a problem when linked with new glibc without 
doing a full archive rebuild with patched glibc.

-- 
Joseph S. Myers
joseph@codesourcery.com