Public corpus download started producing empty zip files today (which breaks upstream CI) 😞

[hartwork]

Hi!

The public corpus download for Expat started producing empty zip files today which breaks my upstream fuzzing regression CI for Expat. For proof:

# cd "$(mktemp -d)"

# wget -q -O corpus.zip https://storage.googleapis.com/expat-backup.clusterfuzz-external.appspot.com/corpus/libFuzzer/expat_xml_parse_fuzzer_UTF-8/public.zip

# ls -l
total 4.0K
-rw-r--r-- 1 user123 user123 22 22. Sep 14:05 corpus.zip

# file corpus.zip 
corpus.zip: Zip archive data (empty)

# unzip corpus.zip 
Archive:  corpus.zip
warning [corpus.zip]:  zipfile is empty

# ls -l
total 4
-rw-r--r-- 1 user123 user123 22 22. Sep 14:05 corpus.zip

Is this known? Could it be fixed?

Thanks in advance! 🙏

[catenacyber]

Same here for Suricata

[catenacyber]

Would you know about this @DavidKorczynski ?

[hartwork]

uriparser is also affected (https://storage.googleapis.com/uriparser-backup.clusterfuzz-external.appspot.com/corpus/libFuzzer/uriparser_uri_dissect_query_malloc_fuzzer/public.zip). My guess is that all projects are affected? I hope there are backups…