[Bug 224015] filemon(4) can't deal with newlines in paths

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224015

            Bug ID: 224015
           Summary: filemon(4) can't deal with newlines in paths
           Product: Base System
           Version: 11.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: crest at bultmann.eu

The filemon(4) format uses newlines as record separators which while uncommon
are perfectly valid inside file paths. This violates the data transparency
required to correctly parse filemon(4) output and can be abused to inject
arbitrary records into the filemon(4) output.

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