From 16e05c582c39e0aa4f0ef6dd70756fded6516d25 Mon Sep 17 00:00:00 2001
From: John Hodge <tpg@ucc.asn.au>
Date: Sun, 4 Nov 2018 22:09:28 +0800
Subject: Codegen C - Fix minor OOB string read

---
 src/trans/codegen_c.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

(limited to 'src/trans/codegen_c.cpp')

diff --git a/src/trans/codegen_c.cpp b/src/trans/codegen_c.cpp
index b578c09b..55b3ea1a 100644
--- a/src/trans/codegen_c.cpp
+++ b/src/trans/codegen_c.cpp
@@ -1975,9 +1975,8 @@ namespace {
                             m_of << "\\x0" << (unsigned int)static_cast<uint8_t>(v);
                         else
                             m_of << "\\x" << (unsigned int)static_cast<uint8_t>(v);
-                        // If the next character is a hex digit,
-                        // close/reopen the string.
-                        if( isxdigit(*(&v+1)) )
+                        // If the next character is a hex digit, close/reopen the string.
+                        if( &v < &s.back() && isxdigit(*(&v+1)) )
                             m_of << "\"\"";
                     }
                 }
-- 
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