76cacf6f8b
Problem: possible integer overflow in spellfile tree bounds check
Solution: Rewrite the overflow check (Devon Krik)
The check 'startidx + len >= maxidx' uses signed int addition and can
overflow when startidx approaches INT_MAX. After overflow the wrapped
result bypasses the guard, allowing the subsequent loop to write
idxs[startidx + i] out of bounds on the heap.
Replace the addition with a safe subtractive check that maintains the
original >= semantics: len >= maxidx - startidx cannot overflow because
both operands are valid indices within [0, maxidx].
This fixes CWE-190 (Integer Overflow) leading to CWE-122 (Heap-based
Buffer Overflow).
closes: vim/vim#20483
276920e138
Co-authored-by: Devon Kirk <hyder365@users.noreply.github.com>
Neovim is a project that seeks to aggressively refactor Vim in order to:
- Simplify maintenance and encourage contributions
- Split the work between multiple developers
- Enable advanced UIs without modifications to the core
- Maximize extensibility
See the Introduction wiki page and Roadmap for more information.
Features
- Modern GUIs
- API access from any language including C/C++, C#, Clojure, D, Elixir, Go, Haskell, Java/Kotlin, JavaScript/Node.js, Julia, Lisp, Lua, Perl, Python, Racket, Ruby, Rust
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- Shared data (shada) among multiple editor instances
- XDG base directories support
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See :help nvim-features for the full list, and :help news for noteworthy changes in the latest version!
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Pre-built packages for Windows, macOS, and Linux are found on the Releases page.
Managed packages are in Homebrew, Debian, Ubuntu, Fedora, Arch Linux, Void Linux, Gentoo, and more!
Install from source
See BUILD.md and supported platforms for details.
The build is CMake-based, but a Makefile is provided as a convenience. After installing the dependencies, run the following command.
make CMAKE_BUILD_TYPE=RelWithDebInfo
sudo make install
To install to a non-default location:
make CMAKE_BUILD_TYPE=RelWithDebInfo CMAKE_INSTALL_PREFIX=/full/path/
make install
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cmake --build build --target helplists all build targets.build/CMakeCache.txt(orcmake -LAH build/) contains the resolved values of all CMake variables.build/compile_commands.jsonshows the full compiler invocations for each translation unit.
Transitioning from Vim
See :help nvim-from-vim for instructions.
Project layout
├─ cmake/ CMake utils
├─ cmake.config/ CMake defines
├─ cmake.deps/ subproject to fetch and build dependencies (optional)
├─ runtime/ plugins and docs
├─ src/nvim/ application source code (see src/nvim/README.md)
│ ├─ api/ API subsystem
│ ├─ eval/ Vimscript subsystem
│ ├─ event/ event-loop subsystem
│ ├─ generators/ code generation (pre-compilation)
│ ├─ lib/ generic data structures
│ ├─ lua/ Lua subsystem
│ ├─ msgpack_rpc/ RPC subsystem
│ ├─ os/ low-level platform code
│ └─ tui/ built-in UI
└─ test/ tests (see test/README.md)
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vim-patch token). See LICENSE.txt for details.