patch 8.2.1796: Vim9: invalid memory access with weird function name
Problem: Vim9: invalid memory access with weird function name. (Dhiraj
Mishra)
Solution: Check the name is valid. Add a test.
diff --git a/src/userfunc.c b/src/userfunc.c
index 1d96a35..39d8fb2 100644
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -2374,6 +2374,7 @@
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 @@
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 @@
}
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();