[Webkit-unassigned] [Bug 285591] New: Missing Validation for Sub-Section Order in Custom Section

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=285591

            Bug ID: 285591
           Summary: Missing Validation for Sub-Section Order in Custom
                    Section
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: tombox1337 at gmail.com

Created attachment 473835

  --> https://bugs.webkit.org/attachment.cgi?id=473835&action=review

program.js

### Description
WebKit does not enforce the requirement for sub-sections within a custom section to be in a specific order. This behavior violates the WebAssembly specification, which mandates that sub-sections should follow a particular order.

### Environment

- OS: Ubuntu 20.04  
- CPU: amd64
- WebKit Version: 146fa28a329d220785d2972c1d691555141e6406

### Steps to Reproduce
Run the following WebAssembly module:
```
./JSCOnly/Debug/bin/jsc ./program.js
```

### Current State
```plaintext
No validation error is produced.
```

### Expected Behavior
The WebAssembly module should fail validation and report an error similar to:
```
out-of-order sub-section
```

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