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patch 8.2.1945: crash when passing NULL function to reduce()

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Problem:    Crash when passing NULL function to reduce().
Solution:   Check for NULL pointer and give an error. (Dominique Pellé,
            closes #7243)
This commit is contained in:
Bram Moolenaar 2020-11-03 18:20:19 +01:00
parent 6fd3a4ba23
commit 0d90e728fe
4 changed files with 12 additions and 2 deletions
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2
src/errors.h
View File

@ -286,4 +286,6 @@ EXTERN char e_cannot_add_to_null_list[]
INIT(= N_("E1130: Cannot add to null list"));
EXTERN char e_cannot_add_to_null_blob[]
INIT(= N_("E1131: Cannot add to null blob"));
EXTERN char e_missing_function_argument[]
INIT(= N_("E1132: Missing function argument"));
#endif

7
src/list.c
View File

@ -2552,8 +2552,11 @@ f_reduce(typval_T *argvars, typval_T *rettv)
}
else
func_name = tv_get_string(&argvars[1]);
if (*func_name == NUL)
return; // type error or empty name
if (func_name == NULL || *func_name == NUL)
{
emsg(_(e_missing_function_argument));
return;
}
vim_memset(&funcexe, 0, sizeof(funcexe));
funcexe.evaluate = TRUE;

3
src/testdir/test_listdict.vim
View File

@ -740,6 +740,9 @@ func Test_reduce()
call assert_equal(42, reduce(test_null_list(), function('add'), 42))
call assert_equal(42, reduce(test_null_blob(), function('add'), 42))
" should not crash
call assert_fails('echo reduce([1], test_null_function())', 'E1132:')
endfunc
" splitting a string to a List using split()

2
src/version.c
View File

@ -750,6 +750,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
1945,
/**/
1944,
/**/