[Bug 248216] linprocfs: Steam, Valve Anti-Cheat and /proc/<pid>/maps formatting.

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248216

            Bug ID: 248216
           Summary: linprocfs: Steam, Valve Anti-Cheat and
                    /proc/<pid>/maps formatting.
           Product: Base System
           Version: 12.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: iwtcex at gmail.com

Created attachment 216717
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=216717&action=edit
that single space patch

With some popular multiplayer games (such as Counter-Strike: Global Offensive)
the Linux Steam client likes to occasionally scan the game process memory,
presumably as part anti-cheat measures. Turns out the client also expects each
inode entry to be followed by a space character, otherwise the parsing code
crashes.

The other related issue is that mapping information often doesn't fit into the
pseudofs (?) 128 Kib limit, which results in a truncated map file. That
occasionally leads to a Steam crash as well (depends on the exact truncation
point).

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