From d522a891d2723df229705df4eb1113fa4753cade Mon Sep 17 00:00:00 2001
From: "Victor M. Alvarez" <plusvic@gmail.com>
Date: Fri, 25 Sep 2015 10:11:04 +0200
Subject: [PATCH] Fix potential stack overflow

---
 libyara/scan.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libyara/scan.c b/libyara/scan.c
index ac1f18b10e..9d6787f7a6 100644
--- a/libyara/scan.c
+++ b/libyara/scan.c
@@ -293,6 +293,9 @@ int _yr_scan_fast_hex_re_exec(
           //
           // The opcode following the ANY is located at ip + 4
 
+          if (sp >= MAX_FAST_HEX_RE_STACK)
+            return -4;
+
           code_stack[sp] = ip + 4;
           input_stack[sp] = current_input;
           matches_stack[sp] = matches;