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>

" Tests for using Ctrl-A/Ctrl-X using DBCS.

set encoding=cp932
scriptencoding cp932

func SetUp()
  new
  set nrformats&
endfunc

func TearDown()
  bwipe!
endfunc

func Test_increment_dbcs_1()
  set nrformats+=alpha
  call setline(1, ["ŽR1"])
  exec "norm! 0\<C-A>"
  call assert_equal(["ŽR2"], getline(1, '$'))
  call assert_equal([0, 1, 3, 0], getpos('.'))

  call setline(1, ["‚`‚a‚b0xDE‚e"])
  exec "norm! 0\<C-X>"
  call assert_equal(["‚`‚a‚b0xDD‚e"], getline(1, '$'))
  call assert_equal([0, 1, 10, 0], getpos('.'))
endfunc

" vim: shiftwidth=2 sts=2 expandtab