From: Richard Russon <rich@flatcap.org>
Date: Tue, 3 Jul 2018 09:34:07 +0000 (+0100)
Subject: prevent buffer underrun
X-Git-Tag: neomutt-20180716~13
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=737c17798bf8555807a883a4346efb8d56704a79;p=neomutt

prevent buffer underrun

Thanks @l2dy
---

diff --git a/muttlib.c b/muttlib.c
index 86c7cb3fb..264c5677a 100644
--- a/muttlib.c
+++ b/muttlib.c
@@ -1482,6 +1482,8 @@ void mutt_get_parent_path(char *output, char *path, size_t olen)
   {
     mutt_str_strfcpy(output, path, olen);
     int n = mutt_str_strlen(output);
+    if (n == 0)
+      return;
 
     /* remove any final trailing '/' */
     if (output[n - 1] == '/')