Mercurial > vim
view runtime/ftplugin/pdf.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 | 82b5078be2dd |
children | 7c7432a53a6c |
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" Vim filetype plugin file " Language: PDF " Maintainer: Tim Pope <vimNOSPAM@tpope.info> " Last Change: 2007 Dec 16 if exists("b:did_ftplugin") finish endif let b:did_ftplugin = 1 setlocal commentstring=%%s setlocal comments=:% let b:undo_ftplugin = "setlocal cms< com< | unlet! b:match_words" if exists("g:loaded_matchit") let b:match_words = '\<\%(\d\+\s\+\d\+\s\+\)obj\>:\<endobj\>,\<stream$:\<endstream\>,\<xref\>:\<trailer\>,<<:>>' endif if exists("g:no_plugin_maps") || exists("g:no_pdf_maps") || v:version < 700 finish endif if !exists("b:pdf_tagstack") let b:pdf_tagstack = [] endif let b:undo_ftplugin .= " | silent! nunmap <buffer> <C-]> | silent! nunmap <buffer> <C-T>" nnoremap <silent><buffer> <C-]> :call <SID>Tag()<CR> " Inline, so the error from an empty tag stack will be simple. nnoremap <silent><buffer> <C-T> :if len(b:pdf_tagstack) > 0 <Bar> call setpos('.',remove(b:pdf_tagstack, -1)) <Bar> else <Bar> exe "norm! \<Lt>C-T>" <Bar> endif<CR> function! s:Tag() call add(b:pdf_tagstack,getpos('.')) if getline('.') =~ '^\d\+$' && getline(line('.')-1) == 'startxref' return s:dodigits(getline('.')) elseif getline('.') =~ '/Prev\s\+\d\+\>\%(\s\+\d\)\@!' && expand("<cword>") =~ '^\d\+$' return s:dodigits(expand("<cword>")) elseif getline('.') =~ '^\d\{10\} \d\{5\} ' return s:dodigits(matchstr(getline('.'),'^\d\+')) else let line = getline(".") let lastend = 0 let pat = '\<\d\+\s\+\d\+\s\+R\>' while lastend >= 0 let beg = match(line,'\C'.pat,lastend) let end = matchend(line,'\C'.pat,lastend) if beg < col(".") && end >= col(".") return s:doobject(matchstr(line,'\C'.pat,lastend)) endif let lastend = end endwhile return s:notag() endif endfunction function! s:doobject(string) let first = matchstr(a:string,'^\s*\zs\d\+') let second = matchstr(a:string,'^\s*\d\+\s\+\zs\d\+') norm! m' if first != '' && second != '' let oldline = line('.') let oldcol = col('.') 1 if !search('^\s*'.first.'\s\+'.second.'\s\+obj\>') exe oldline exe 'norm! '.oldcol.'|' return s:notag() endif endif endfunction function! s:dodigits(digits) let digits = 0 + substitute(a:digits,'^0*','','') norm! m' if digits <= 0 norm! 1go else " Go one character before the destination and advance. This method " lands us after a newline rather than before, if that is our target. exe "goto ".(digits)."|norm! 1 " endif endfunction function! s:notag() silent! call remove(b:pdf_tagstack,-1) echohl ErrorMsg echo "E426: tag not found" echohl NONE endfunction