From: Daniel Stenberg <daniel@haxx.se>
Date: Thu, 6 Aug 2020 22:15:12 +0000 (+0200)
Subject: smtp_parse_address: handle blank input string properly
X-Git-Tag: curl-7_72_0~26
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=265717d27117a722b2b3ccc5f38de722c3a79070;p=thirdparty%2Fcurl.git

smtp_parse_address: handle blank input string properly

Closes #5792
---

diff --git a/lib/smtp.c b/lib/smtp.c
index 685513b3b1..aea41bb4e3 100644
--- a/lib/smtp.c
+++ b/lib/smtp.c
@@ -1760,8 +1760,10 @@ static CURLcode smtp_parse_address(struct connectdata *conn, const char *fqma,
     return CURLE_OUT_OF_MEMORY;
 
   length = strlen(dup);
-  if(dup[length - 1] == '>')
-    dup[length - 1] = '\0';
+  if(length) {
+    if(dup[length - 1] == '>')
+      dup[length - 1] = '\0';
+  }
 
   /* Extract the host name from the address (if we can) */
   host->name = strpbrk(dup, "@");