Basically, i grepped for zlib.c and deflate.c (and i think libz.c as well). As i said, my check was very simplistic. It didn't start as "which packages have a problem", but more along the lines of "let's estimate the size of the problem".
I was limited on time i could spend on this. As best as i could, i tried compiling a list of maintainers email adresses and send them a mail, then posted this thread on PM. After that, i had to go back to my regularly scheduled slavery.
perl -e 'use Crypt::Digest::SHA256 qw[sha256_hex]; print substr(sha256_hex("the Answer To Life, The Universe And Everything"), 6, 2), "\n";'
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I believe this is all of them though maybe the string I looked for needs tweaking
https://grep.metacpan.org/search?q=exclude+worst+case+performance+for+pathological+files&qd=&qft=&qls=on
You can also look for the files if you checkout the repo grep.metacpan.org uses. At which point you get:
$>git ls-files |egrep '(in|de)flate\.c'
A/Alien-FreeImage/src/Source/ZLib/deflate.c
A/Alien-FreeImage/src/Source/ZLib/inflate.c
A/Archive-Unzip-Burst/unzip-6.0/inflate.c
B/BackupPC-XS/zlib/deflate.c
B/BackupPC-XS/zlib/inflate.c
B/Business-KontoCheck/zlib/deflate.c
B/Business-KontoCheck/zlib/inflate.c
C/Compress-Raw-Zlib/zlib-src/deflate.c
C/Compress-Raw-Zlib/zlib-src/inflate.c
C/Compress-Zopfli/zopflib/src/zopfli/deflate.c
F/Filter-gunzip/devel/exe-zlib-inflate.c
G/Git-Raw/deps/libgit2/deps/zlib/deflate.c
G/Git-Raw/deps/libgit2/deps/zlib/inflate.c
G/Git-XS/xs/libgit2/deps/zlib/deflate.c
G/Git-XS/xs/libgit2/deps/zlib/inflate.c
I/Image-PNG-Simple/zlib-1.2.8/deflate.c
I/Image-PNG-Simple/zlib-1.2.8/inflate.c
L/LibZip/myldr/zlib-src/deflate.c
L/LibZip/myldr/zlib-src/inflate.c
P/PDL-IO-Matlab/matio-1.5.0/src/inflate.c
P/Protocol-WebSocket-Fast/clib/tests/deflate/deflate.cc
T/Tk/PNG/zlib/deflate.c
T/Tk/PNG/zlib/inflate.c
W/Win32-File-Summary/deflate.c
W/Win32-File-Summary/inflate.c
c/cppAdaptive1/src/dlib/external/zlib/deflate.c
c/cppAdaptive1/src/dlib/external/zlib/inflate.c
c/cppAdaptive2/src/dlib/external/zlib/deflate.c
c/cppAdaptive2/src/dlib/external/zlib/inflate.c
p/perl/cpan/Compress-Raw-Zlib/zlib-src/deflate.c
p/perl/cpan/Compress-Raw-Zlib/zlib-src/inflate.c
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