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patch 8.2.1796: Vim9: invalid memory access with weird function name

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Problem:    Vim9: invalid memory access with weird function name. (Dhiraj
            Mishra)
Solution:   Check the name is valid.  Add a test.
This commit is contained in:
Bram Moolenaar
2020-10-04 13:42:34 +02:00
parent 2bb2658bef
commit 7b5d544269
3 changed files with 36 additions and 1 deletions
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9
src/userfunc.c
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@@ -2374,6 +2374,7 @@ trans_function_name(
int extra = 0;
lval_T lv;
int vim9script;
static char *e_function_name = N_("E129: Function name required");
if (fdp != NULL)
CLEAR_POINTER(fdp);
@@ -2401,7 +2402,7 @@ trans_function_name(
if (end == start)
{
if (!skip)
emsg(_("E129: Function name required"));
emsg(_(e_function_name));
goto theend;
}
if (end == NULL || (lv.ll_tv != NULL && (lead > 2 || lv.ll_range)))
@@ -2517,6 +2518,12 @@ trans_function_name(
}
len = (int)(end - lv.ll_name);
}
if (len <= 0)
{
if (!skip)
emsg(_(e_function_name));
goto theend;
}
// In Vim9 script a user function is script-local by default.
vim9script = ASCII_ISUPPER(*start) && in_vim9script();