diff -urN qtwebkit.orig/Source/WebKit2/Platform/unix/SharedMemoryUnix.cpp qtwebkit/Source/WebKit2/Platform/unix/SharedMemoryUnix.cpp
--- qtwebkit.orig/Source/WebKit2/Platform/unix/SharedMemoryUnix.cpp	2016-07-02 16:34:01.146909836 +0100
+++ qtwebkit/Source/WebKit2/Platform/unix/SharedMemoryUnix.cpp	2016-07-02 16:41:41.843588498 +0100
@@ -136,6 +136,28 @@
     return instance.release();
 }
 #else
+
+#ifndef O_CLOEXEC
+# define O_CLOEXEC   02000000
+#endif
+
+int CLOEXEC_shm_open (const char *__name, int __oflag, mode_t __mode)
+{
+    static int O_CLOEXEC_acceptable_value = O_CLOEXEC;
+    if ((O_CLOEXEC_acceptable_value != O_CLOEXEC) && (__oflag & O_CLOEXEC)) {
+        /* We tried already and failed, mask it off. */
+        __oflag ^= O_CLOEXEC;
+    }
+
+    int result = shm_open (__name, __oflag, __mode);
+    if ((result < 0) && (errno == EINVAL) && (__oflag & O_CLOEXEC)) {
+        /* Assume EINVAL failure was due to O_CLOEXEC and set the acceptable value to 0. */
+        O_CLOEXEC_acceptable_value = 0;
+        result = shm_open (__name, __oflag ^ O_CLOEXEC, __mode);
+    }
+    return result;
+}
+
 PassRefPtr<SharedMemory> SharedMemory::create(size_t size)
 {
     CString tempName;
@@ -146,7 +168,7 @@
         tempName = name.utf8();
 
         do {
-            fileDescriptor = shm_open(tempName.data(), O_CREAT | O_CLOEXEC | O_RDWR, S_IRUSR | S_IWUSR);
+            fileDescriptor = CLOEXEC_shm_open(tempName.data(), O_CREAT | O_CLOEXEC | O_RDWR, S_IRUSR | S_IWUSR);
         } while (fileDescriptor == -1 && errno == EINTR);
     }
     if (fileDescriptor == -1) {