commit 96e08e028cbcda23dccf83de6b71b3c6bf1f9d4a
author Bram Moolenaar <Bram@vim.org> Thu Mar 31 21:40:33 2022 +0100
committer Bram Moolenaar <Bram@vim.org> Thu Mar 31 21:40:33 2022 +0100
tree fbc716dcf37e97cd261d658282d48a5ab67335f2
parent 3a6f952cc87065a4cf1f6502b2054ba99fdf45ed

patch 8.2.4659: invalid memory access when using printable function name

Problem:    Invalid memory access when using printable function name.
Solution:   Adjust copied name length.

src/userfunc.c

diff --git a/src/userfunc.c b/src/userfunc.c
index ffc67ea..052923e 100644
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -543,7 +543,7 @@
     if (len + 3 > bufsize)
 	return name;
 
-    mch_memmove(buf + 5, name + 3, len + 1);
+    mch_memmove(buf + 5, name + 3, len - 2);  // Include trailing NUL
     mch_memmove(buf, "<SNR>", 5);
     return buf;
 }

src/version.c

diff --git a/src/version.c b/src/version.c
index f0240d2..c6f4446 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4659,
+/**/
     4658,
 /**/
     4657,