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patch 8.2.3396: when libcall() fails invalid pointer may be used

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Problem:    When libcall() fails invalid pointer may be used.
Solution:   Initialize the string to NULL. (Yasuhiro Matsumoto, closes #8829)
This commit is contained in:
Bram Moolenaar 2021-09-02 19:53:07 +02:00
parent 26a4484da2
commit 87e1587b8a
2 changed files with 7 additions and 0 deletions
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5
src/evalfunc.c
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@ -6689,9 +6689,14 @@ libcall_common(typval_T *argvars UNUSED, typval_T *rettv, int type)
if (argvars[2].v_type == VAR_STRING) if (argvars[2].v_type == VAR_STRING)
string_in = argvars[2].vval.v_string; string_in = argvars[2].vval.v_string;
if (type == VAR_NUMBER) if (type == VAR_NUMBER)
{
string_result = NULL; string_result = NULL;
}
else else
{
rettv->vval.v_string = NULL;
string_result = &rettv->vval.v_string; string_result = &rettv->vval.v_string;
}
if (mch_libcall(argvars[0].vval.v_string, if (mch_libcall(argvars[0].vval.v_string,
argvars[1].vval.v_string, argvars[1].vval.v_string,
string_in, string_in,

2
src/version.c
View File

@ -755,6 +755,8 @@ static char *(features[]) =
static int included_patches[] = static int included_patches[] =
{ /* Add new patch number below this line */ { /* Add new patch number below this line */
/**/
3396,
/**/ /**/
3395, 3395,
/**/ /**/