diff -ur qtwebengine-opensource-src-5.9.0/src/3rdparty/chromium/base/process/memory_linux.cc qtwebengine-opensource-src-5.9.0-qtbug-61521/src/3rdparty/chromium/base/process/memory_linux.cc
--- qtwebengine-opensource-src-5.9.0/src/3rdparty/chromium/base/process/memory_linux.cc	2017-05-18 16:51:44.000000000 +0200
+++ qtwebengine-opensource-src-5.9.0-qtbug-61521/src/3rdparty/chromium/base/process/memory_linux.cc	2017-06-26 23:48:15.166464570 +0200
@@ -60,6 +60,7 @@
 #endif
 void* __libc_memalign(size_t alignment, size_t size);
 
+#if !defined(TOOLKIT_QT) //QTBUG-61521,QTBUG-60565
 // Overriding the system memory allocation functions:
 //
 // For security reasons, we want malloc failures to be fatal. Too much code
@@ -129,6 +130,7 @@
   *ptr = memalign(alignment, size);
   return 0;
 }
+#endif // TOOLKIT_QT
 
 }  // extern C
 
diff -ur qtwebengine-opensource-src-5.9.0/src/core/api/qtbug-60565.cpp qtwebengine-opensource-src-5.9.0-qtbug-61521/src/core/api/qtbug-60565.cpp
--- qtwebengine-opensource-src-5.9.0/src/core/api/qtbug-60565.cpp	2017-05-19 06:22:04.000000000 +0200
+++ qtwebengine-opensource-src-5.9.0-qtbug-61521/src/core/api/qtbug-60565.cpp	2017-06-25 22:33:28.508223362 +0200
@@ -39,6 +39,8 @@
 
 #include <new>
 #include <unistd.h>
+#include <stdlib.h>
+#include <malloc.h>
 
 #if defined(__LP64__)
 #  define SIZE_T_MANGLING  "m"
@@ -47,6 +49,7 @@
 #endif
 
 #define SHIM_ALIAS_SYMBOL(fn) __attribute__((weak, alias(#fn)))
+#define SHIM_HIDDEN __attribute__ ((visibility ("hidden")))
 
 extern "C" {
 
@@ -82,26 +85,100 @@
 void __ShimCppDeleteArrayNoThrow(void* address, const std::nothrow_t&) noexcept
     SHIM_ALIAS_SYMBOL(ShimCppDeleteArray);
 
+__asm__(".symver __ShimMalloc, malloc@Qt_5");
+void* __ShimMalloc(size_t size) noexcept
+    SHIM_ALIAS_SYMBOL(ShimMalloc);
+
+__asm__(".symver __ShimCalloc, calloc@Qt_5");
+void* __ShimCalloc(size_t n, size_t size) noexcept
+    SHIM_ALIAS_SYMBOL(ShimCalloc);
+
+__asm__(".symver __ShimRealloc, realloc@Qt_5");
+void* __ShimRealloc(void* address, size_t size) noexcept
+    SHIM_ALIAS_SYMBOL(ShimRealloc);
+
+__asm__(".symver __ShimMemalign, memalign@Qt_5");
+void* __ShimMemalign(size_t alignment, size_t size) noexcept
+    SHIM_ALIAS_SYMBOL(ShimMemalign);
+
+__asm__(".symver __ShimPosixMemalign, posix_memalign@Qt_5");
+int __ShimPosixMemalign(void** res, size_t alignment, size_t size) noexcept
+    SHIM_ALIAS_SYMBOL(ShimPosixMemalign);
+
+__asm__(".symver __ShimValloc, valloc@Qt_5");
+void* __ShimValloc(size_t size) noexcept
+    SHIM_ALIAS_SYMBOL(ShimValloc);
+
+__asm__(".symver __ShimPvalloc, pvalloc@Qt_5");
+void* __ShimPvalloc(size_t size) noexcept
+    SHIM_ALIAS_SYMBOL(ShimPvalloc);
+
+__asm__(".symver __ShimFree, free@Qt_5");
+void __ShimFree(void* address) noexcept
+    SHIM_ALIAS_SYMBOL(ShimFree);
+
 static void* __shimCppNew(size_t size);
 static void* __shimCppNewArray(size_t size);
 static void __shimCppDelete(void *address);
 static void __shimCppDeleteArray(void *address);
+static void* __shimMalloc(size_t size) noexcept;
+static void* __shimCalloc(size_t n, size_t size) noexcept;
+static void* __shimRealloc(void* address, size_t size) noexcept;
+static void* __shimMemalign(size_t alignment, size_t size) noexcept;
+static int __shimPosixMemalign(void** res, size_t alignment, size_t size)
+    noexcept;
+static void* __shimValloc(size_t size) noexcept;
+static void* __shimPvalloc(size_t size) noexcept;
+static void __shimFree(void* address) noexcept;
 
-static void* ShimCppNew(size_t size) {
+SHIM_HIDDEN void* ShimCppNew(size_t size) {
     return __shimCppNew(size);
 }
 
-static void* ShimCppNewArray(size_t size) {
+SHIM_HIDDEN void* ShimCppNewArray(size_t size) {
     return __shimCppNewArray(size);
 }
 
-static void ShimCppDelete(void* address) {
+SHIM_HIDDEN void ShimCppDelete(void* address) {
     __shimCppDelete(address);
 }
 
-static void ShimCppDeleteArray(void* address) {
+SHIM_HIDDEN void ShimCppDeleteArray(void* address) {
     __shimCppDeleteArray(address);
 }
+
+SHIM_HIDDEN void* ShimMalloc(size_t size) noexcept {
+  return __shimMalloc(size);
+}
+
+SHIM_HIDDEN void* ShimCalloc(size_t n, size_t size) noexcept {
+  return __shimCalloc(n, size);
+}
+
+SHIM_HIDDEN void* ShimRealloc(void* address, size_t size) noexcept {
+  return __shimRealloc(address, size);
+}
+
+SHIM_HIDDEN void* ShimMemalign(size_t alignment, size_t size) noexcept {
+  return __shimMemalign(alignment, size);
+}
+
+SHIM_HIDDEN int ShimPosixMemalign(void** res, size_t alignment, size_t size)
+    noexcept {
+  return __shimPosixMemalign(res, alignment, size);
+}
+
+SHIM_HIDDEN void* ShimValloc(size_t size) noexcept {
+  return __shimValloc(size);
+}
+
+SHIM_HIDDEN void* ShimPvalloc(size_t size) noexcept {
+  return __shimPvalloc(size);
+}
+
+SHIM_HIDDEN void ShimFree(void* address) noexcept {
+  __shimFree(address);
+}
 } // extern "C"
 
 static void* __shimCppNew(size_t size) {
@@ -119,3 +196,36 @@
 static void __shimCppDeleteArray(void* address) {
     operator delete[](address);
 }
+
+static void* __shimMalloc(size_t size) noexcept {
+  return malloc(size);
+}
+
+static void* __shimCalloc(size_t n, size_t size) noexcept {
+  return calloc(n, size);
+}
+
+static void* __shimRealloc(void* address, size_t size) noexcept {
+  return realloc(address, size);
+}
+
+static void* __shimMemalign(size_t alignment, size_t size) noexcept {
+  return memalign(alignment, size);
+}
+
+static int __shimPosixMemalign(void** res, size_t alignment, size_t size)
+    noexcept {
+  return posix_memalign(res, alignment, size);
+}
+
+static void* __shimValloc(size_t size) noexcept {
+  return valloc(size);
+}
+
+static void* __shimPvalloc(size_t size) noexcept {
+  return pvalloc(size);
+}
+
+static void __shimFree(void* address) noexcept {
+  free(address);
+}