patch 9.0.2141: [security]: buffer-overflow in suggest_trie_walk Commit: https://github.com/vim/vim/commit/0fb375aae608d7306b4baf9c1f906961f32e2abf Author: Christian Brabandt <cb@256bit.org> Date: Wed Nov 29 10:23:39 2023 +0100 patch 9.0.2141: [security]: buffer-overflow in suggest_trie_walk Problem: [security]: buffer-overflow in suggest_trie_walk Solution: Check n before using it as index into byts array Basically, n as an index into the byts array, can point to beyond the byts array. So let's double check, that n is within the expected range after incrementing it from sp->ts_curi and bail out if it would be invalid. Reported by @henices, thanks! Signed-off-by: Christian Brabandt <cb@256bit.org>

" Test behavior of interrupt()

let s:bufwritepre_called = 0
let s:bufwritepost_called = 0

func s:bufwritepre()
  let s:bufwritepre_called = 1
  call interrupt()
endfunction

func s:bufwritepost()
  let s:bufwritepost_called = 1
endfunction

func Test_interrupt()
  new Xinterrupt
  let n = 0
  try
    au BufWritePre Xinterrupt call s:bufwritepre()
    au BufWritePost Xinterrupt call s:bufwritepost()
    w!
  catch /^Vim:Interrupt$/
  endtry
  call assert_equal(1, s:bufwritepre_called)
  call assert_equal(0, s:bufwritepost_called)
  call assert_equal(0, filereadable('Xinterrupt'))

  au! BufWritePre
  au! BufWritePost
endfunc

" vim: shiftwidth=2 sts=2 expandtab