From 65d64a5b60a4a3883f2cd799d92c6091d8854f23 Mon Sep 17 00:00:00 2001
From: JerikoOne <jeriko.one@gmx.us>
Date: Sat, 7 Jul 2018 16:20:56 -0500
Subject: [PATCH] Check for int underflow in imap_quote_string

---
 imap/util.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/imap/util.c b/imap/util.c
index 58224fc38..57802b254 100644
--- a/imap/util.c
+++ b/imap/util.c
@@ -821,9 +821,9 @@ void imap_quote_string(char *dest, size_t dlen, const char *src, bool quote_back
   {
     if (strchr(quote, *s))
     {
-      dlen -= 2;
-      if (dlen == 0)
+      if (dlen < 2)
         break;
+      dlen -= 2;
       *pt++ = '\\';
       *pt++ = *s;
     }
-- 
2.49.0