view runtime/plugin/rrhelper.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 f177a6431514
children
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" Vim plugin with helper function(s) for --remote-wait
" Maintainer: Flemming Madsen <fma@cci.dk>
" Last Change: 2008 May 29

" Has this already been loaded?
if exists("loaded_rrhelper") || !has("clientserver")
  finish
endif
let loaded_rrhelper = 1

" Setup answers for a --remote-wait client who will assume
" a SetupRemoteReplies() function in the command server

function SetupRemoteReplies()
  let cnt = 0
  let max = argc()

  let id = expand("<client>")
  if id == 0
    return
  endif
  while cnt < max
    " Handle same file from more clients and file being more than once
    " on the command line by encoding this stuff in the group name
    let uniqueGroup = "RemoteReply_".id."_".cnt

    " Path separators are always forward slashes for the autocommand pattern.
    " Escape special characters with a backslash.
    let f = substitute(argv(cnt), '\\', '/', "g")
    if exists('*fnameescape')
      let f = fnameescape(f)
    else
      let f = escape(f, " \t\n*?[{`$\\%#'\"|!<")
    endif
    execute "augroup ".uniqueGroup
    execute "autocmd ".uniqueGroup." BufUnload ". f ."  call DoRemoteReply('".id."', '".cnt."', '".uniqueGroup."', '". f ."')"
    let cnt = cnt + 1
  endwhile
  augroup END
endfunc

function DoRemoteReply(id, cnt, group, file)
  call server2client(a:id, a:cnt)
  execute 'autocmd! '.a:group.' BufUnload '.a:file
  execute 'augroup! '.a:group
endfunc

" vim: set sw=2 sts=2 :