patch 9.0.2035: [security] use-after-free with wildmenu Commit: https://github.com/vim/vim/commit/8f4fb007e4d472b09ff6bed9ffa485e0c3093699 Author: Yee Cheng Chin <ychin.git@gmail.com> Date: Tue Oct 17 10:06:56 2023 +0200 patch 9.0.2035: [security] use-after-free with wildmenu Problem: [security] use-after-free with wildmenu Solution: properly clean up the wildmenu when exiting Fix wildchar/wildmenu/pum memory corruption with special wildchar's Currently, using `wildchar=<Esc>` or `wildchar=<C-\>` can lead to a memory corruption if using wildmenu+pum, or wrong states if only using wildmenu. This is due to the code only using one single place inside the cmdline process loop to perform wild menu clean up (by checking `end_wildmenu`) but there are other odd situations where the loop could have exited and we need a post-loop clean up just to be sure. If the clean up was not done you would have a stale popup menu referring to invalid memory, or if not using popup menu, incorrect status line (if `laststatus=0`). For example, if you hit `<Esc>` two times when it's wildchar, there's a hard-coded behavior to exit command-line as a failsafe for user, and if you hit `<C-\><C-\><C-N>` it will also exit command-line, but the clean up code would not have hit because of specialized `<C-\>` handling. Fix Ctrl-E / Ctrl-Y to not cancel/accept wildmenu if they are also used for 'wildchar'/'wildcharm'. Currently they don't behave properly, and also have potentially memory unsafe behavior as the logic is currently not accounting for this situation and try to do both. (Previous patch that addressed this: #11677) Also, correctly document Escape key behavior (double-hit it to escape) in wildchar docs as it's previously undocumented. In addition, block known invalid chars to be set in `wildchar` option, such as Ctrl-C and `<CR>`. This is just to make it clear to the user they shouldn't be set, and is not required for this bug fix. closes: #13361 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: Yee Cheng Chin <ychin.git@gmail.com>

README_ami.txt for version 9.0 of Vim: Vi IMproved.

This file explains the installation of Vim on Amiga systems.
See README.txt for general information about Vim.


Unpack the distributed files in the place where you want to keep them.  It is
wise to have a "vim" directory to keep your vimrc file and any other files you
change.  The distributed files go into a subdirectory.  This way you can
easily upgrade to a new version.  For example:

  dh0:editors/vim		contains your vimrc and modified files
  dh0:editors/vim/vim54		contains the Vim version 5.4 distributed files
  dh0:editors/vim/vim55		contains the Vim version 5.5 distributed files

You would then unpack the archives like this:

  cd dh0:editors
  tar xf t:vim90bin.tar
  tar xf t:vim90rt.tar

Set the $VIM environment variable to point to the top directory of your Vim
files.  For the above example:

  set VIM=dh0:editors/vim

Vim version 5.4 will look for your vimrc file in $VIM, and for the runtime
files in $VIM/vim54.  See ":help $VIM" for more information.

Make sure the Vim executable is in your search path.  Either copy the Vim
executable to a directory that is in your search path, or (preferred) modify
the search path to include the directory where the Vim executable is.