Mercurial > vim
view src/testdir/term_util.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 | 79b2eb83f2df |
children |
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" Functions about terminal shared by several tests " Only load this script once. if exists('*CanRunVimInTerminal') finish endif source shared.vim " For most tests we need to be able to run terminal Vim with 256 colors. On " MS-Windows the console only has 16 colors and the GUI can't run in a " terminal. func CanRunVimInTerminal() return has('terminal') && !has('win32') endfunc " Skip the rest if there is no terminal feature at all. if !has('terminal') finish endif " Stops the shell running in terminal "buf". func StopShellInTerminal(buf) call term_sendkeys(a:buf, "exit\r") let job = term_getjob(a:buf) call WaitForAssert({-> assert_equal("dead", job_status(job))}) call TermWait(a:buf) endfunc " Wrapper around term_wait() to allow more time for re-runs of flaky tests " The second argument is the minimum time to wait in msec, 10 if omitted. func TermWait(buf, ...) let wait_time = a:0 ? a:1 : 10 if exists('g:run_nr') if g:run_nr == 2 let wait_time *= 4 elseif g:run_nr > 2 let wait_time *= 10 endif endif call term_wait(a:buf, wait_time) " In case it wasn't set yet. let g:test_is_flaky = 1 endfunc " Run Vim with "arguments" in a new terminal window. " By default uses a size of 20 lines and 75 columns. " Returns the buffer number of the terminal. " " Options is a dictionary, these items are recognized: " "keep_t_u7" - when 1 do not make t_u7 empty (resetting t_u7 avoids clearing " parts of line 2 and 3 on the display) " "rows" - height of the terminal window (max. 20) " "cols" - width of the terminal window (max. 78) " "statusoff" - number of lines the status is offset from default " "wait_for_ruler" - if zero then don't wait for ruler to show " "no_clean" - if non-zero then remove "--clean" from the command " "cmd" - run any other command, e.g. "xxd" (used in xxd test) func RunVimInTerminal(arguments, options) " If Vim doesn't exit a swap file remains, causing other tests to fail. " Remove it here. call delete(".swp") if exists('$COLORFGBG') " Clear $COLORFGBG to avoid 'background' being set to "dark", which will " only be corrected if the response to t_RB is received, which may be too " late. let $COLORFGBG = '' endif " Make a horizontal and vertical split, so that we can get exactly the right " size terminal window. Works only when the current window is full width. call assert_equal(&columns, winwidth(0)) split vsplit " Always do this with 256 colors and a light background. set t_Co=256 background=light hi Normal ctermfg=NONE ctermbg=NONE " Make the window 20 lines high and 75 columns, unless told otherwise or " 'termwinsize' is set. let rows = get(a:options, 'rows', 20) let cols = get(a:options, 'cols', 75) let statusoff = get(a:options, 'statusoff', 1) if get(a:options, 'keep_t_u7', 0) let reset_u7 = '' else let reset_u7 = ' --cmd "set t_u7=" ' endif if empty(get(a:options, 'cmd', '')) let cmd = GetVimCommandCleanTerm() .. reset_u7 .. a:arguments else let cmd = get(a:options, 'cmd') endif if get(a:options, 'no_clean', 0) let cmd = substitute(cmd, '--clean', '', '') endif let options = #{curwin: 1} if &termwinsize == '' let options.term_rows = rows let options.term_cols = cols endif " Accept other options whose name starts with 'term_'. call extend(options, filter(copy(a:options), 'v:key =~# "^term_"')) let buf = term_start(cmd, options) if &termwinsize == '' " in the GUI we may end up with a different size, try to set it. if term_getsize(buf) != [rows, cols] call term_setsize(buf, rows, cols) endif call assert_equal([rows, cols], term_getsize(buf)) else let rows = term_getsize(buf)[0] let cols = term_getsize(buf)[1] endif call TermWait(buf) if get(a:options, 'wait_for_ruler', 1) && empty(get(a:options, 'cmd', '')) " Wait for "All" or "Top" of the ruler to be shown in the last line or in " the status line of the last window. This can be quite slow (e.g. when " using valgrind). " If it fails then show the terminal contents for debugging. try call WaitFor({-> len(term_getline(buf, rows)) >= cols - 1 || len(term_getline(buf, rows - statusoff)) >= cols - 1}) catch /timed out after/ let lines = map(range(1, rows), {key, val -> term_getline(buf, val)}) call assert_report('RunVimInTerminal() failed, screen contents: ' . join(lines, "<NL>")) endtry endif " Starting a terminal to run Vim is always considered flaky. let g:test_is_flaky = 1 return buf endfunc " Stop a Vim running in terminal buffer "buf". func StopVimInTerminal(buf, kill = 1) " Using a terminal to run Vim is always considered flaky. let g:test_is_flaky = 1 call assert_equal("running", term_getstatus(a:buf)) " Wait for all the pending updates to terminal to complete call TermWait(a:buf) " CTRL-O : works both in Normal mode and Insert mode to start a command line. " In Command-line it's inserted, the CTRL-U removes it again. call term_sendkeys(a:buf, "\<C-O>:\<C-U>qa!\<cr>") " Wait for all the pending updates to terminal to complete call TermWait(a:buf) " Wait for the terminal to end. call WaitForAssert({-> assert_equal("finished", term_getstatus(a:buf))}) " If the buffer still exists forcefully wipe it. if a:kill && bufexists(a:buf) exe a:buf .. 'bwipe!' endif endfunc " Open a terminal with a shell, assign the job to g:job and return the buffer " number. func Run_shell_in_terminal(options) if has('win32') let buf = term_start([&shell, '/k'], a:options) else let buf = term_start(&shell, a:options) endif let g:test_is_flaky = 1 let termlist = term_list() call assert_equal(1, len(termlist)) call assert_equal(buf, termlist[0]) let g:job = term_getjob(buf) call assert_equal(v:t_job, type(g:job)) let string = string({'job': buf->term_getjob()}) call assert_match("{'job': 'process \\d\\+ run'}", string) " On slower systems it may take a bit of time before the shell is ready to " accept keys. This mainly matters when using term_sendkeys() next. call TermWait(buf) return buf endfunc " Return concatenated lines in terminal. func Term_getlines(buf, lines) return join(map(a:lines, 'term_getline(a:buf, v:val)'), '') endfunc " vim: shiftwidth=2 sts=2 expandtab