From 0eebb64c1d651a536e2488b5e7be9b8511e6e43c Mon Sep 17 00:00:00 2001
From: Andrey Petrov <andrey.petrov@shazow.net>
Date: Wed, 13 Oct 2021 10:43:49 -0400
Subject: [PATCH] sshd/terminal/terminal.go: Clamp pos to protect from some
 fuzzing failures

---
 sshd/terminal/terminal.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sshd/terminal/terminal.go b/sshd/terminal/terminal.go
index ec04e8f..998c79d 100644
--- a/sshd/terminal/terminal.go
+++ b/sshd/terminal/terminal.go
@@ -264,6 +264,10 @@ func (t *Terminal) moveCursorToPos(pos int) {
 		return
 	}
 
+	if pos > len(t.line) {
+		pos = len(t.line)
+	}
+
 	x := visualLength(t.prompt) + visualLength(t.line[:pos])
 	y := x / t.termWidth
 	x = x % t.termWidth