Suricata

Found by oss-fuzz
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=44203

Minimized reproducer with rules

alert http any any -> any any (filestore; file.name; content:!"2008.mp4"; sid:2; rev:1;)
alert http any any -> any any (filestore; file.name; content:!"tar.gz"; sid:3; rev:1;)
alert http any any -> any any (file.name; content:"/a/expl/2008.mp4"; startswith; endswith; sid:4; rev:1;)

and attached pcap (which has HTTP with /a/expl/2008.mp4 by the way)

Victor, you added this debug validation code.
Is this a real problem ?