From 2a4eaa927eaa8ccb4b819ad41bb308e433b48820 Mon Sep 17 00:00:00 2001
From: Levente Polyak <levente@leventepolyak.net>
Date: Sun, 19 Mar 2017 21:21:19 +0100
Subject: [PATCH] avoid searching 0-length in memory (#181)

This will result in an internal exception and make pwndbg stop
searching. Just avoid and exit this search block if the current
search length equals zero.
---
 pwndbg/search.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pwndbg/search.py b/pwndbg/search.py
index 8cdfcb09c..913e2f174 100644
--- a/pwndbg/search.py
+++ b/pwndbg/search.py
@@ -49,7 +49,11 @@ def search(searchfor, mapping=None, start=None, end=None,
             if not pwndbg.memory.peek(start):
                 break
 
-            start = i.search_memory(start, end - start, searchfor)
+            length = end - start
+            if length <= 0:
+                break
+
+            start = i.search_memory(start, length, searchfor)
 
             if start is None:
                 break