Mercurial > vim
view src/testdir/script_util.vim @ 33776:9503dc55b5ed v9.0.2108
patch 9.0.2108: [security]: overflow with count for :s command
Commit: https://github.com/vim/vim/commit/ac63787734fda2e294e477af52b3bd601517fa78
Author: Christian Brabandt <cb@256bit.org>
Date: Tue Nov 14 20:45:48 2023 +0100
patch 9.0.2108: [security]: overflow with count for :s command
Problem: [security]: overflow with count for :s command
Solution: Abort the :s command if the count is too large
If the count after the :s command is larger than what fits into a
(signed) long variable, abort with e_value_too_large.
Adds a test with INT_MAX as count and verify it correctly fails.
It seems the return value on Windows using mingw compiler wraps around,
so the initial test using :s/./b/9999999999999999999999999990 doesn't
fail there, since the count is wrapping around several times and finally
is no longer larger than 2147483647. So let's just use 2147483647 in the
test, which hopefully will always cause a failure
Signed-off-by: Christian Brabandt <cb@256bit.org>
author | Christian Brabandt <cb@256bit.org> |
---|---|
date | Thu, 16 Nov 2023 22:15:10 +0100 |
parents | f936d46cc9c1 |
children |
line wrap: on
line source
" Functions shared by the tests for Vim Script " Commands to track the execution path of a script com! XpathINIT let g:Xpath = '' com! -nargs=1 -bar Xpath let g:Xpath ..= <args> com! XloopINIT let g:Xloop = 1 com! -nargs=1 -bar Xloop let g:Xpath ..= <args> .. g:Xloop com! XloopNEXT let g:Xloop += 1 " MakeScript() - Make a script file from a function. {{{2 " " Create a script that consists of the body of the function a:funcname. " Replace any ":return" by a ":finish", any argument variable by a global " variable, and every ":call" by a ":source" for the next following argument " in the variable argument list. This function is useful if similar tests are " to be made for a ":return" from a function call or a ":finish" in a script " file. func MakeScript(funcname, ...) let script = tempname() execute "redir! >" . script execute "function" a:funcname redir END execute "edit" script " Delete the "function" and the "endfunction" lines. Do not include the " word "function" in the pattern since it might be translated if LANG is " set. When MakeScript() is being debugged, this deletes also the debugging " output of its line 3 and 4. exec '1,/.*' . a:funcname . '(.*)/d' /^\d*\s*endfunction\>/,$d %s/^\d*//e %s/return/finish/e %s/\<a:\(\h\w*\)/g:\1/ge normal gg0 let cnt = 0 while search('\<call\s*\%(\u\|s:\)\w*\s*(.*)', 'W') > 0 let cnt = cnt + 1 s/\<call\s*\%(\u\|s:\)\w*\s*(.*)/\='source ' . a:{cnt}/ endwhile g/^\s*$/d write bwipeout return script endfunc " ExecAsScript - Source a temporary script made from a function. {{{2 " " Make a temporary script file from the function a:funcname, ":source" it, and " delete it afterwards. However, if an exception is thrown the file may remain, " the caller should call DeleteTheScript() afterwards. let s:script_name = '' func ExecAsScript(funcname) " Make a script from the function passed as argument. let s:script_name = MakeScript(a:funcname) " Source and delete the script. exec "source" s:script_name call delete(s:script_name) let s:script_name = '' endfunc func DeleteTheScript() if s:script_name call delete(s:script_name) let s:script_name = '' endif endfunc com! -nargs=1 -bar ExecAsScript call ExecAsScript(<f-args>)