Patch 8.2.3396

[Bram Moolenaar]

Patch 8.2.3396
Problem: When libcall() fails invalid pointer may be used.
Solution: Initialize the string to NULL. (Yasuhiro Matsumoto, closes #8829)
Files: src/evalfunc.c


*** ../vim-8.2.3395/src/evalfunc.c 2021-08-28 12:49:21.957091792 +0200
--- src/evalfunc.c 2021-09-02 19:52:45.134849664 +0200
***************
*** 6689,6697 ****
--- 6689,6702 ----
if (argvars[2].v_type == VAR_STRING)
string_in = argvars[2].vval.v_string;
if (type == VAR_NUMBER)
+ {
string_result = NULL;
+ }
else
+ {
+ rettv->vval.v_string = NULL;
string_result = &rettv->vval.v_string;
+ }
if (mch_libcall(argvars[0].vval.v_string,
argvars[1].vval.v_string,
string_in,
*** ../vim-8.2.3395/src/version.c 2021-09-02 18:49:02.748932320 +0200
--- src/version.c 2021-09-02 19:50:57.527113770 +0200
***************
*** 757,758 ****
--- 757,760 ----
{ /* Add new patch number below this line */
+ /**/
+ 3396,
/**/

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/// Bram Moolenaar -- Br...@Moolenaar.net -- http://www.Moolenaar.net \\\
/// \\\
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