starred/terminal
1
0
Fork 0
mirror of https://github.com/microsoft/terminal.git synced 2026-02-04 05:35:20 +00:00
Code Issues 19.0k Packages Projects Releases 20 Wiki Activity

[PR #15235] [MERGED] Prevent crash when VTParameters::subspan is out of range #30520

New Issue
Open
opened 2026-01-31 09:41:20 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 09:41:20 +00:00
Owner
Copy Link

📋 Pull Request Information

Original PR: https://github.com/microsoft/terminal/pull/15235
Author: @j4james
Created: 4/25/2023
Status: ✅ Merged
Merged: 4/25/2023
Merged by: @zadjii-msft

Base: main ← Head: fix-subspan-crash

📝 Commits (2)

  • 882adae Fix crash when VTParameters subspan is out of range.
  • f965e39 Add subspan unit test.

📊 Changes

2 files changed (+38 additions, -1 deletions)

View changed files

📝 src/terminal/adapter/DispatchTypes.hpp (+1 -1)
📝 src/terminal/parser/ut_parser/StateMachineTest.cpp (+37 -0)

📄 Description

Summary of the Pull Request

There are certain escape sequences that use the VTParameters::subspan
method to access a subsection of the provided parameter list. When the
parameter list is empty, that subspan call can end up using an offset
that is out of range, which causes the terminal to crash. This PR stops
that from happening by clamping the offset so it's in range.

References and Relevant Issues

This bug effected the DECCARA and DECRARA operations introduced in
PR #14285, and the DECPS operation introduced in PR #13208.

Validation Steps Performed

I've manually confirmed that the sequences mentioned above are no longer
crashing when executed with an empty parameter list, and I've added a
little unit test that checks VTParameters::subspan method is returning
the expected results when passed an offset that is out of range.

PR Checklist

🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.

## 📋 Pull Request Information **Original PR:** https://github.com/microsoft/terminal/pull/15235 **Author:** [@j4james](https://github.com/j4james) **Created:** 4/25/2023 **Status:** ✅ Merged **Merged:** 4/25/2023 **Merged by:** [@zadjii-msft](https://github.com/zadjii-msft) **Base:** `main` ← **Head:** `fix-subspan-crash` --- ### 📝 Commits (2) - [`882adae`](https://github.com/microsoft/terminal/commit/882adae15f1bd38a9e0ff1edc58798c47f1ff2a7) Fix crash when VTParameters subspan is out of range. - [`f965e39`](https://github.com/microsoft/terminal/commit/f965e39baeacfdc053bd30cea8e9fa406bbcbdaa) Add subspan unit test. ### 📊 Changes **2 files changed** (+38 additions, -1 deletions) <details> <summary>View changed files</summary> 📝 `src/terminal/adapter/DispatchTypes.hpp` (+1 -1) 📝 `src/terminal/parser/ut_parser/StateMachineTest.cpp` (+37 -0) </details> ### 📄 Description ## Summary of the Pull Request There are certain escape sequences that use the `VTParameters::subspan` method to access a subsection of the provided parameter list. When the parameter list is empty, that `subspan` call can end up using an offset that is out of range, which causes the terminal to crash. This PR stops that from happening by clamping the offset so it's in range. ## References and Relevant Issues This bug effected the `DECCARA` and `DECRARA` operations introduced in PR #14285, and the `DECPS` operation introduced in PR #13208. ## Validation Steps Performed I've manually confirmed that the sequences mentioned above are no longer crashing when executed with an empty parameter list, and I've added a little unit test that checks `VTParameters::subspan` method is returning the expected results when passed an offset that is out of range. ## PR Checklist - [x] Closes #15234 - [x] Tests added/passed - [ ] Documentation updated - [ ] Schema updated (if necessary) --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>
claunia added the pull-request label 2026-01-31 09:41:20 +00:00
Sign in to join this conversation.
No Branch/Tag Specified
Branches Tags
Labels
Clear labels
⛺ Reserved
A11yCO
A11yMAS
A11ySev1
A11ySev2
A11ySev3
A11yTTValidated
A11yUsable
A11yVoiceAccess
A11yWCAG
Area-Accessibility
Area-AtlasEngine
Area-AzureShell
Area-Build
Area-Build
Area-Chat
Area-CmdPal
Area-CodeHealth
Area-Commandline
Area-CookedRead
Area-DefApp
Area-Extensibility
Area-Fonts
Area-GroupPolicy
Area-i18n
Area-Input
Area-Interaction
Area-Interop
Area-Localization
Area-Output
Area-Performance
Area-Portable
Area-Quality
Area-Remoting
Area-Rendering
Area-Schema
Area-Server
Area-Settings
Area-SettingsUI
Area-ShellExtension
Area-ShellExtension
Area-ShellExtension
Area-Suggestions
Area-Suggestions
Area-TerminalConnection
Area-TerminalControl
Area-Theming
Area-UserInterface
Area-VT
Area-Windowing
Area-WPFControl
AutoMerge
Blocking-Ingestion
Culprit-Centennial
Culprit-WinUI
Disability-All
Disability-Blind
Disability-LowVision
Disability-Mobility
External-Blocked-WinUI3
Fixed
Gathering-Data
good first issue
HCL-E+D
HCL-WindowsTerminal
Help Wanted
Impact-Compatibility
Impact-Compliance
Impact-Correctness
Impact-Visual
In-PR
InclusionBacklog
InclusionBacklog-Windows TerminalWin32
InclusionCommitted-202206
Issue-Bug
Issue-Docs
Issue-Feature
Issue-Feature
Issue-Question
Issue-Samples
Issue-Scenario
Issue-Task
Needs-Attention
Needs-Author-Feedback
Needs-Bisect
Needs-Discussion
Needs-Repro
Needs-Tag-Fix
Needs-Tag-Fix
Needs-Triage
No-Recent-Activity
Priority-0
Priority-1
Priority-2
Priority-3
Product-Cmd.exe
Product-Colortool
Product-Colortool
Product-Colortool
Product-Conhost
Product-Conpty
Product-Meta
Product-Powershell
Product-Terminal
Product-WSL
pull-request
Mirrored from GitHub Pull Request
 Resolution-Answered
Resolution-By-Design
Resolution-Duplicate
Resolution-External
Resolution-Fix-Available
Resolution-Fix-Committed
Resolution-No-Repro
Resolution-Won't-Fix
Severity-Blocking
Severity-Crash
Severity-DataLoss
spam
this-will-be-a-breaking-change
Tracking-External
WindowsTerminal_Win32
Work-Item
zAskModeBug
zInbox-Bug
No Label pull-request
Milestone
No items
No Milestone
Projects
Clear projects
No project
Assignees
Clear assignees
claunia
No Assignees
1 Participants
Notifications
Due Date
No due date set.
Dependencies

No dependencies set.

Reference: starred/terminal#30520
Delete Branch "%!s()"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?