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Sending negative values to ResizePseudoConsole returns S_OK #4827

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opened 2026-01-30 23:57:36 +00:00 by claunia · 2 comments
claunia commented 2026-01-30 23:57:36 +00:00
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Originally created by @ghost on GitHub (Nov 5, 2019).

Environment

Windows build number: 18363,418
Windows Terminal version (if applicable):

Any other software?

Steps to reproduce

Call ResizePseudoConsole with negative values stored in the passed COORD structure.

Expected behavior

returned HRESULT should indicate failure since a pty cannot have a negative size

Actual behavior

returned HRESULT indicates success.

Originally created by @ghost on GitHub (Nov 5, 2019). <!-- 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨 I ACKNOWLEDGE THE FOLLOWING BEFORE PROCEEDING: 1. If I delete this entire template and go my own path, the core team may close my issue without further explanation or engagement. 2. If I list multiple bugs/concerns in this one issue, the core team may close my issue without further explanation or engagement. 3. If I write an issue that has many duplicates, the core team may close my issue without further explanation or engagement (and without necessarily spending time to find the exact duplicate ID number). 4. If I leave the title incomplete when filing the issue, the core team may close my issue without further explanation or engagement. 5. If I file something completely blank in the body, the core team may close my issue without further explanation or engagement. All good? Then proceed! --> <!-- This bug tracker is monitored by Windows Terminal development team and other technical folks. **Important: When reporting BSODs or security issues, DO NOT attach memory dumps, logs, or traces to Github issues**. Instead, send dumps/traces to secure@microsoft.com, referencing this GitHub issue. If this is an application crash, please also provide a Feedback Hub submission link so we can find your diagnostic data on the backend. Use the category "Apps > Windows Terminal (Preview)" and choose "Share My Feedback" after submission to get the link. Please use this form and describe your issue, concisely but precisely, with as much detail as possible. --> # Environment ```none Windows build number: 18363,418 Windows Terminal version (if applicable): Any other software? ``` # Steps to reproduce Call `ResizePseudoConsole` with negative values stored in the passed `COORD` structure. <!-- A description of how to trigger this bug. --> # Expected behavior returned HRESULT should indicate failure since a pty cannot have a negative size # Actual behavior returned HRESULT indicates success.
claunia added the Resolution-Fix-CommittedIssue-BugArea-ServerProduct-Conpty labels 2026-01-30 23:57:36 +00:00
claunia commented 2026-01-30 23:57:37 +00:00
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@miniksa commented on GitHub (Nov 5, 2019):

388b975663/src/winconpty/winconpty.cpp (L201-L215)

The COORD which has two signed SHORTs is being pushed into a structure of unsigned short and apparently nothing is complaining or validating that.

@miniksa commented on GitHub (Nov 5, 2019): https://github.com/microsoft/terminal/blob/388b975663e895c45710584e0e0fda8bcebc1fbe/src/winconpty/winconpty.cpp#L201-L215 The `COORD` which has two signed `SHORT`s is being pushed into a structure of `unsigned short` and apparently nothing is complaining or validating that.
claunia commented 2026-01-30 23:57:37 +00:00
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@ghost commented on GitHub (Jan 14, 2020):

:tada:This issue was addressed in #3936, which has now been successfully released as Windows Terminal Preview v0.8.10091.0.🎉

Handy links:

@ghost commented on GitHub (Jan 14, 2020): :tada:This issue was addressed in #3936, which has now been successfully released as `Windows Terminal Preview v0.8.10091.0`.:tada: Handy links: * [Release Notes](https://github.com/microsoft/terminal/releases/tag/v0.8.10091.0) * [Store Download](https://www.microsoft.com/store/apps/9n0dx20hk701?cid=storebadge&ocid=badge)
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Reference: starred/terminal#4827
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