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sideshowbarker 59eb221d7c LibWasm: Fix “return” leaking intermediate value-stack entries to caller
Problem: Loading WebAssembly modules that use “return” mid-function can
corrupt the heap and crash the browser.

Cause: HANDLE_INSTRUCTION(return_) shrank the label stack but left any
working values pushed before the “return” instruction on the shared
value stack. Those residuals leaked into the caller’s frame and
accumulated across calls — until they overflowed the value stack’s
inline storage and corrupted adjacent allocator metadata.

Fix: After shrinking the label stack down to the function-level label,
also remove value-stack entries between that label’s recorded
stack_height and the top .arity() result values — mirroring the cleanup
that branch_to_label<true> already performs for br/br_if.

Fixes https://github.com/LadybirdBrowser/ladybird/issues/9614
2026-05-25 09:00:44 +02:00
.devcontainer Devcontainer: Fixes for fedora 2026-04-30 10:10:25 +02:00
.github CI: Switch GNU build from sanitizer to release 2026-05-24 10:13:23 +02:00
AK AK: Remove unused IntrusiveListRelaxedConst 2026-05-22 09:32:01 +02:00
Base/res LibWebView: Load content blocker lists from settings 2026-05-24 16:59:59 +02:00
Documentation LibWeb: Mark pseudo-elements as either synthetic or element-reference 2026-05-21 14:26:22 +01:00
Libraries LibWasm: Fix “return” leaking intermediate value-stack entries to caller 2026-05-25 09:00:44 +02:00
Meta LibWeb/Bindings: Add helpers for recursive IDL type traversal 2026-05-24 16:37:28 +02:00
Services WebContent: Rename process compositor host 2026-05-25 00:45:24 +02:00
Tests LibWeb: Cache TextNode chunks between layouts 2026-05-24 23:41:57 +02:00
UI LibWebView: Use page background color while resizing 2026-05-24 23:41:41 +02:00
Utilities LibWeb: Make the Rust HTML parser unconditional 2026-05-17 15:35:56 +02:00
.clang-format Meta: Enforce newlines around namespaces 2025-05-14 02:01:59 -06:00
.clang-tidy Meta: Disable clang-tidy's const correctness checks 2025-07-08 11:04:15 -04:00
.clangd Meta: Enable angled brackets in clangd 2026-03-20 19:32:14 +01:00
.editorconfig Meta: Add .editorconfig 2022-09-10 17:32:55 +01:00
.gitattributes LibGfx: Remove support for the various "portable" image formats 2024-06-17 21:57:35 +02:00
.gitignore Meta: Ignore log files 2026-04-23 13:50:01 -04:00
.mailmap Meta: Update my e-mail address everywhere 2024-10-04 13:19:50 +02:00
.pre-commit-config.yaml Meta: Replace deprecated pre-commit stage name 2024-10-18 09:40:59 +02:00
.prettierignore Tests: Exclude JS AST and bytecode tests from prettier checks 2026-02-19 02:45:37 +01:00
.prettierrc Meta: Increase the line length enforced by prettier to 120 2025-10-31 19:55:50 -04:00
.ycm_extra_conf.py Meta: Sort all python imports 2025-06-09 11:25:14 -04:00
Cargo.lock LibWeb: Add adblock-rust FFI hooks 2026-05-24 08:16:46 +02:00
Cargo.toml LibWeb: Add adblock-rust FFI hooks 2026-05-24 08:16:46 +02:00
CMakeLists.txt Meta: Remove a legacy NoCoverage target 2026-05-05 22:08:24 +02:00
CMakePresets.json CMake+CI: Use the same preset names on every platform 2026-01-17 12:18:46 -07:00
CODE_OF_CONDUCT.md Meta: Add code of conduct (from the Ruby community) 2024-10-02 09:49:52 +02:00
CONTRIBUTING.md Meta: Disallow PR descriptions entirely generated by AI 2026-04-05 16:17:29 +02:00
ISSUES.md Everywhere: Document use of ladybird.py over ladybird.sh 2025-05-29 16:24:17 -04:00
LICENSE Meta: Update license year 2025-02-10 11:40:57 +00:00
pyproject.toml Meta+CI: Add pyright type checking to lint_python.sh 2026-05-13 08:13:51 -05:00
README.md Libraries: Remove LibArchive 2024-11-25 13:37:45 +01:00
rust-toolchain.toml Meta: Pin Rust toolchain version 2026-04-16 23:42:22 +02:00
rustfmt.toml Rust: Add a config file for rustfmt 2026-04-18 08:05:47 -04:00
SECURITY.md Documentation: Make updates to align better with new issue template 2024-10-31 09:18:08 +01:00
vcpkg-configuration.json Meta: Add overlay port for vulkan-loader 2024-07-07 15:56:59 +02:00
vcpkg.json Meta: Ensure version overrides in vcpkg.json are consistent 2026-05-05 22:08:24 +02:00

Ladybird

Ladybird is a truly independent web browser, using a novel engine based on web standards.

Important

Ladybird is in a pre-alpha state, and only suitable for use by developers

Features

We aim to build a complete, usable browser for the modern web.

Ladybird uses a multi-process architecture with a main UI process, several WebContent renderer processes, an ImageDecoder process, and a RequestServer process.

Image decoding and network connections are done out of process to be more robust against malicious content. Each tab has its own renderer process, which is sandboxed from the rest of the system.

At the moment, many core library support components are inherited from SerenityOS:

  • LibWeb: Web rendering engine
  • LibJS: JavaScript engine
  • LibWasm: WebAssembly implementation
  • LibCrypto/LibTLS: Cryptography primitives and Transport Layer Security
  • LibHTTP: HTTP/1.1 client
  • LibGfx: 2D Graphics Library, Image Decoding and Rendering
  • LibUnicode: Unicode and locale support
  • LibMedia: Audio and video playback
  • LibCore: Event loop, OS abstraction layer
  • LibIPC: Inter-process communication

How do I build and run this?

See build instructions for information on how to build Ladybird.

Ladybird runs on Linux, macOS, Windows (with WSL2), and many other *Nixes.

How do I read the documentation?

Code-related documentation can be found in the documentation folder.

Get in touch and participate!

Join our Discord server to participate in development discussion.

Please read Getting started contributing if you plan to contribute to Ladybird for the first time.

Before opening an issue, please see the issue policy and the detailed issue-reporting guidelines.

The full contribution guidelines can be found in CONTRIBUTING.md.

License

Ladybird is licensed under a 2-clause BSD license.