Mercurial > vim
view src/testdir/test_changedtick.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 | 08940efa6b4e |
children |
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line source
" Tests for b:changedtick func Test_changedtick_increments() new " New buffer has an empty line, tick starts at 2. let expected = 2 call assert_equal(expected, b:changedtick) call assert_equal(expected, b:['changedtick']) call setline(1, 'hello') let expected += 1 call assert_equal(expected, b:changedtick) call assert_equal(expected, b:['changedtick']) undo " Somehow undo counts as two changes. let expected += 2 call assert_equal(expected, b:changedtick) call assert_equal(expected, b:['changedtick']) bwipe! endfunc func Test_changedtick_dict_entry() let d = b: call assert_equal(b:changedtick, d['changedtick']) endfunc func Test_changedtick_bdel() new let bnr = bufnr('%') let v = b:changedtick bdel " Delete counts as a change too. call assert_equal(v + 1, getbufvar(bnr, 'changedtick')) endfunc func Test_changedtick_islocked() call assert_equal(0, islocked('b:changedtick')) let d = b: call assert_equal(0, islocked('d.changedtick')) endfunc func Test_changedtick_fixed() call assert_fails('let b:changedtick = 4', 'E46:') call assert_fails('let b:["changedtick"] = 4', 'E46:') call assert_fails('lockvar b:changedtick', 'E940:') call assert_fails('lockvar b:["changedtick"]', 'E46:') call assert_fails('unlockvar b:changedtick', 'E940:') call assert_fails('unlockvar b:["changedtick"]', 'E46:') call assert_fails('unlet b:changedtick', 'E795:') call assert_fails('unlet b:["changedtick"]', 'E46:') let d = b: call assert_fails('lockvar d["changedtick"]', 'E46:') call assert_fails('unlockvar d["changedtick"]', 'E46:') call assert_fails('unlet d["changedtick"]', 'E46:') endfunc func Test_changedtick_not_incremented_with_write() new let fname = "XChangeTick" exe 'w ' .. fname " :write when the buffer is not changed does not increment changedtick let expected = b:changedtick w call assert_equal(expected, b:changedtick) " :write when the buffer IS changed DOES increment changedtick let expected = b:changedtick + 1 setlocal modified w call assert_equal(expected, b:changedtick) " Two ticks: change + write let expected = b:changedtick + 2 call setline(1, 'hello') w call assert_equal(expected, b:changedtick) " Two ticks: start insert + write let expected = b:changedtick + 2 normal! o w call assert_equal(expected, b:changedtick) " Three ticks: start insert + change + write let expected = b:changedtick + 3 normal! ochanged w call assert_equal(expected, b:changedtick) bwipe call delete(fname) endfunc " vim: shiftwidth=2 sts=2 expandtab