From 9a747cb5b7866d440211aa1dc4e07dd4ff914c2c Mon Sep 17 00:00:00 2001
From: Thiago Macieira <thiago.macieira@intel.com>
Date: Mon, 12 May 2014 13:52:29 -0700
Subject: Fix an off-by-4 error in qHash with CRC32

I tested only the 64-bit build. The 32-bit build was reading garbage
past the end of the strings in some cases.

Change-Id: If6d239754e16a17cc4e8bb71e2b7778429dfa7ba
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@digia.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
---
 src/corelib/tools/qhash.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/corelib/tools')

diff --git a/src/corelib/tools/qhash.cpp b/src/corelib/tools/qhash.cpp
index a5d14a3535..ca645636e4 100644
--- a/src/corelib/tools/qhash.cpp
+++ b/src/corelib/tools/qhash.cpp
@@ -125,7 +125,7 @@ static uint crc32(const Char *ptr, size_t len, uint h)
 #  else
     p += 4;
     for ( ; p <= e; p += 4)
-        h = _mm_crc32_u32(h, *reinterpret_cast<const uint *>(p));
+        h = _mm_crc32_u32(h, *reinterpret_cast<const uint *>(p - 4));
     p -= 4;
     len = e - p;
 #  endif
-- 
cgit v1.2.3