Summary: | [Linuxulator]: linprocfs: Steam, Valve Anti-Cheat and /proc/<pid>/maps formatting. | ||||||
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Product: | Base System | Reporter: | Alex S <iwtcex> | ||||
Component: | kern | Assignee: | Edward Tomasz Napierala <trasz> | ||||
Status: | Closed FIXED | ||||||
Severity: | Affects Only Me | CC: | dchagin, emaste, rhurlin, trasz | ||||
Priority: | --- | ||||||
Version: | 12.1-RELEASE | ||||||
Hardware: | amd64 | ||||||
OS: | Any | ||||||
Bug Depends on: | |||||||
Bug Blocks: | 247219 | ||||||
Attachments: |
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A commit references this bug: Author: trasz Date: Thu Oct 15 12:48:31 UTC 2020 New revision: 366722 URL: https://svnweb.freebsd.org/changeset/base/366722 Log: 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. PR: 248216 Submitted by: Alex S <iwtcex@gmail.com> MFC after: 2 weeks Changes: head/sys/compat/linprocfs/linprocfs.c (See also https://reviews.freebsd.org/D20575) (In reply to Edward Tomasz Napierala from comment #2) I think it could be closed as fixed, ok? This issue is definitely fully addressed. |
Created attachment 216717 [details] 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).