Mercurial > vim
view vimtutor.bat @ 33862:242b964d6269 v9.0.2140
patch 9.0.2140: [security]: use-after-free in win-enter
Commit: https://github.com/vim/vim/commit/eec0c2b3a4cfab93dd8d4adaa60638d47a2bbc8a
Author: Christian Brabandt <cb@256bit.org>
Date: Tue Nov 28 22:03:48 2023 +0100
patch 9.0.2140: [security]: use-after-free in win-enter
Problem: [security]: use-after-free in win-enter
Solution: validate window pointer before calling win_enter()
win_goto() may stop visual mode, if it is active. However, this may in
turn trigger the ModeChanged autocommand, which could potentially free
the wp pointer which was valid before now became stale and points to now
freed memory.
So before calling win_enter(), let's verify one more time, that the
wp pointer still points to a valid window structure.
Reported by @henices, thanks!
Signed-off-by: Christian Brabandt <cb@256bit.org>
author | Christian Brabandt <cb@256bit.org> |
---|---|
date | Sun, 10 Dec 2023 15:16:01 +0100 |
parents | 79aaaa134298 |
children |
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:: Start Vim on a copy of the tutor file. @echo off :: Usage: vimtutor [-console] [xx] :: :: -console means gvim will not be used :: xx is a language code like "es" or "nl". :: When an xx argument is given, it tries loading that tutor. :: When this fails or no xx argument was given, it tries using 'v:lang' :: When that also fails, it uses the English version. :: Use Vim to copy the tutor, it knows the value of $VIMRUNTIME FOR %%d in (. %TMP% %TEMP%) DO ( call :test_dir_writable "%~dpf0" %%d IF NOT ERRORLEVEL 1 GOTO dir_ok ) echo No working directory is found GOTO end :test_dir_writable SET TUTORCOPY=%2\$tutor$ COPY %1 %TUTORCOPY% >nul 2>nul GOTO end :dir_ok SET xx=%1 IF NOT .%1==.-console GOTO use_gui SHIFT SET xx=%1 GOTO use_vim :use_gui :: Try making a copy of tutor with gvim. If gvim cannot be found, try using :: vim instead. If vim cannot be found, alert user to check environment and :: installation. :: The script tutor.vim tells Vim which file to copy. start "dummy" /b /w "%~dp0gvim.exe" -u NONE -c "so $VIMRUNTIME/tutor/tutor.vim" IF ERRORLEVEL 1 GOTO use_vim :: Start gvim without any .vimrc, set 'nocompatible' start "dummy" /b /w "%~dp0gvim.exe" -u NONE -c "set nocp" %TUTORCOPY% GOTO end :use_vim :: The script tutor.vim tells Vim which file to copy call vim -u NONE -c "so $VIMRUNTIME/tutor/tutor.vim" IF ERRORLEVEL 1 GOTO no_executable :: Start vim without any .vimrc, set 'nocompatible' call vim -u NONE -c "set nocp" %TUTORCOPY% GOTO end :no_executable ECHO. ECHO. ECHO No vim or gvim found in current directory or PATH. ECHO Check your installation or re-run install.exe :end :: remove the copy of the tutor IF EXIST %TUTORCOPY% DEL %TUTORCOPY% SET xx=