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 Ex := command.

func Test_ex_equal()
  new
  call setline(1, ["foo\tbar", "bar\tfoo"])

  let a = execute('=')
  call assert_equal("\n2", a)

  let a = execute('=#')
  call assert_equal("\n2\n  1 foo     bar", a)

  let a = execute('=l')
  call assert_equal("\n2\nfoo^Ibar$", a)

  let a = execute('=p')
  call assert_equal("\n2\nfoo     bar", a)

  let a = execute('=l#')
  call assert_equal("\n2\n  1 foo^Ibar$", a)

  let a = execute('=p#')
  call assert_equal("\n2\n  1 foo     bar", a)

  let a = execute('.=')
  call assert_equal("\n1", a)

  call assert_fails('3=', 'E16:')
  call assert_fails('=x', 'E488:')

  bwipe!
endfunc

" vim: shiftwidth=2 sts=2 expandtab