Mercurial > vim
view src/testdir/test_ex_z.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 | 0f93e9423890 |
children |
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line source
" Test :z func Test_z() call setline(1, range(1, 100)) let a = execute('20z3') call assert_equal("\n20\n21\n22", a) call assert_equal(22, line('.')) " 'window' should be set to the {count} value. call assert_equal(3, &window) " If there is only one window, then twice the amount of 'scroll' is used. set scroll=2 let a = execute('20z') call assert_equal("\n20\n21\n22\n23", a) call assert_equal(23, line('.')) let a = execute('20z+3') " FIXME: I would expect the same result as '20z3' since 'help z' " says: Specifying no mark at all is the same as "+". " However it " gives "\n21\n22\n23" instead. Bug in Vim or in ":help :z"? "call assert_equal("\n20\n21\n22", a) "call assert_equal(22, line('.')) let a = execute('20z-3') call assert_equal("\n18\n19\n20", a) call assert_equal(20, line('.')) let a = execute('20z=3') call assert_match("^\n18\n19\n-\\+\n20\n-\\+\n21\n22$", a) call assert_equal(20, line('.')) let a = execute('20z^3') call assert_equal("\n14\n15\n16\n17", a) call assert_equal(17, line('.')) let a = execute('20z.3') call assert_equal("\n19\n20\n21", a) call assert_equal(21, line('.')) let a = execute('20z#3') call assert_equal("\n 20 20\n 21 21\n 22 22", a) call assert_equal(22, line('.')) let a = execute('20z#-3') call assert_equal("\n 18 18\n 19 19\n 20 20", a) call assert_equal(20, line('.')) let a = execute('20z#=3') call assert_match("^\n 18 18\n 19 19\n-\\+\n 20 20\n-\\+\n 21 21\n 22 22$", a) call assert_equal(20, line('.')) " Test with {count} bigger than the number of lines in buffer. let a = execute('20z1000') call assert_match("^\n20\n21\n.*\n99\n100$", a) call assert_equal(100, line('.')) let a = execute('20z-1000') call assert_equal(20, line('.')) let a = execute('20z=1000') call assert_match("^\n1\n.*\n-\\+\n20\n-\\\+\n.*\n100$", a) call assert_equal(20, line('.')) " Tests with multiple windows. 5split call setline(1, range(1, 100)) " Without a count, the number line is window height - 3. let a = execute('20z') call assert_equal("\n20\n21", a) call assert_equal(21, line('.')) " If window height - 3 is less than 1, it should be clamped to 1. resize 2 let a = execute('20z') call assert_equal("\n20", a) call assert_equal(20, line('.')) call assert_fails('20z=a', 'E144:') set window& scroll& bw! endfunc " :z! is the same as :z but count uses the Vim window height when not specified. func Test_z_bang() 4split call setline(1, range(1, 20)) let a = execute('10z!') call assert_equal("\n10\n11\n12\n13\n14\n15\n16\n17\n18\n19\n20", a) let a = execute('10z!#') call assert_equal("\n 10 10\n 11 11\n 12 12\n 13 13\n 14 14\n 15 15\n 16 16\n 17 17\n 18 18\n 19 19\n 20 20", a) let a = execute('10z!3') call assert_equal("\n10\n11\n12", a) %bwipe! endfunc func Test_z_overflow() " This used to access invalid memory as a result of an integer overflow " and freeze vim. normal ox normal Heat z777777776666666 ') endfunc func Test_z_negative_lnum() new z^ call assert_equal(1, line('.')) bwipe! endfunc " vim: shiftwidth=2 sts=2 expandtab