diff -Nru protobuf-3.0.0/debian/changelog protobuf-3.0.0/debian/changelog
--- protobuf-3.0.0/debian/changelog	2016-12-10 10:09:06.000000000 +0200
+++ protobuf-3.0.0/debian/changelog	2017-03-16 12:10:45.000000000 +0200
@@ -1,3 +1,13 @@
+protobuf (3.0.0-9ubuntu2) zesty; urgency=low
+
+  * debian/patches/Hide-unnecessary-exported-library-symbols.patch:
+    - Backport upstream fix to hide unnecessary exported symbols
+      (LP: #1667352)
+  * debian/patches/fix-reload.diff:
+    - Removed, not needed anymore.
+
+ -- Alexandros Frantzis <alexandros.frantzis@canonical.com>  Thu, 16 Mar 2017 12:10:45 +0200
+
 protobuf (3.0.0-9ubuntu1) zesty; urgency=low
 
   * Merge from Debian unstable.  Remaining changes:
diff -Nru protobuf-3.0.0/debian/patches/fix-reload.diff protobuf-3.0.0/debian/patches/fix-reload.diff
--- protobuf-3.0.0/debian/patches/fix-reload.diff	2016-09-08 15:18:58.000000000 +0300
+++ protobuf-3.0.0/debian/patches/fix-reload.diff	1970-01-01 02:00:00.000000000 +0200
@@ -1,30 +0,0 @@
-Index: b/src/google/protobuf/stubs/common.cc
-===================================================================
---- a/src/google/protobuf/stubs/common.cc
-+++ b/src/google/protobuf/stubs/common.cc
-@@ -412,7 +412,6 @@ Mutex* shutdown_functions_mutex = NULL;
- GOOGLE_PROTOBUF_DECLARE_ONCE(shutdown_functions_init);
- 
- void InitShutdownFunctions() {
--  shutdown_functions = new vector<void (*)()>;
-   shutdown_functions_mutex = new Mutex;
- }
- 
-@@ -423,6 +422,8 @@ inline void InitShutdownFunctionsOnce()
- void OnShutdown(void (*func)()) {
-   InitShutdownFunctionsOnce();
-   MutexLock lock(shutdown_functions_mutex);
-+  if (internal::shutdown_functions == NULL)
-+    shutdown_functions = new vector<void (*)()>;
-   shutdown_functions->push_back(func);
- }
- 
-@@ -443,8 +444,6 @@ void ShutdownProtobufLibrary() {
-   }
-   delete internal::shutdown_functions;
-   internal::shutdown_functions = NULL;
--  delete internal::shutdown_functions_mutex;
--  internal::shutdown_functions_mutex = NULL;
- }
- 
- #if PROTOBUF_USE_EXCEPTIONS
diff -Nru protobuf-3.0.0/debian/patches/Hide-unnecessary-exported-library-symbols.patch protobuf-3.0.0/debian/patches/Hide-unnecessary-exported-library-symbols.patch
--- protobuf-3.0.0/debian/patches/Hide-unnecessary-exported-library-symbols.patch	1970-01-01 02:00:00.000000000 +0200
+++ protobuf-3.0.0/debian/patches/Hide-unnecessary-exported-library-symbols.patch	2017-03-16 12:00:26.000000000 +0200
@@ -0,0 +1,125 @@
+Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/protobuf/+bug/1667352 
+Origin: backport, https://github.com/google/protobuf/commit/c57c77b4b7b065a0f14c757f5b8983e136511067
+Author: Alexandros Frantzis <alexandros.frantzis@canonical.com>
+Description: Hide unnecessary exported library symbols
+
+--- a/configure.ac
++++ b/configure.ac
+@@ -92,6 +92,25 @@ ACX_CHECK_SUNCC
+ # to the link
+ AC_PROG_LIBTOOL
+ 
++# Check whether the linker supports version scripts
++AC_MSG_CHECKING([whether the linker supports version scripts])
++save_LDFLAGS=$LDFLAGS
++LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map"
++cat > conftest.map <<EOF
++{
++  global:
++    main;
++  local:
++    *;
++};
++EOF
++AC_LINK_IFELSE(
++  [AC_LANG_SOURCE([int main() { return 0; }])],
++  [have_ld_version_script=yes; AC_MSG_RESULT(yes)],
++  [have_ld_version_script=no; AC_MSG_RESULT(no)])
++LDFLAGS=$save_LDFLAGS
++AM_CONDITIONAL([HAVE_LD_VERSION_SCRIPT], [test "$have_ld_version_script" == "yes"])
++
+ # Checks for header files.
+ AC_HEADER_STDC
+ AC_CHECK_HEADERS([fcntl.h inttypes.h limits.h stdlib.h unistd.h])
+diff --git a/src/Makefile.am b/src/Makefile.am
+index 0a53431..6e900eb 100644
+--- a/src/Makefile.am
++++ b/src/Makefile.am
+@@ -173,6 +173,10 @@ lib_LTLIBRARIES = libprotobuf-lite.la libprotobuf.la libprotoc.la
+ 
+ libprotobuf_lite_la_LIBADD = $(PTHREAD_LIBS)
+ libprotobuf_lite_la_LDFLAGS = -version-info 10:0:0 -export-dynamic -no-undefined
++if HAVE_LD_VERSION_SCRIPT
++libprotobuf_lite_la_LDFLAGS += -Wl,--version-script=$(srcdir)/libprotobuf-lite.map
++EXTRA_libprotobuf_lite_la_DEPENDENCIES = libprotobuf-lite.map
++endif
+ libprotobuf_lite_la_SOURCES =                                  \
+   google/protobuf/stubs/atomicops_internals_x86_gcc.cc         \
+   google/protobuf/stubs/atomicops_internals_x86_msvc.cc        \
+@@ -214,6 +218,10 @@ libprotobuf_lite_la_SOURCES =                                  \
+ 
+ libprotobuf_la_LIBADD = $(PTHREAD_LIBS)
+ libprotobuf_la_LDFLAGS = -version-info 10:0:0 -export-dynamic -no-undefined
++if HAVE_LD_VERSION_SCRIPT
++libprotobuf_la_LDFLAGS += -Wl,--version-script=$(srcdir)/libprotobuf.map
++EXTRA_libprotobuf_la_DEPENDENCIES = libprotobuf.map
++endif
+ libprotobuf_la_SOURCES =                                       \
+   $(libprotobuf_lite_la_SOURCES)                               \
+   google/protobuf/any.pb.cc                                    \
+@@ -298,6 +306,10 @@ nodist_libprotobuf_la_SOURCES = $(nodist_libprotobuf_lite_la_SOURCES)
+ 
+ libprotoc_la_LIBADD = $(PTHREAD_LIBS) libprotobuf.la
+ libprotoc_la_LDFLAGS = -version-info 10:0:0 -export-dynamic -no-undefined
++if HAVE_LD_VERSION_SCRIPT
++libprotoc_la_LDFLAGS += -Wl,--version-script=$(srcdir)/libprotoc.map
++EXTRA_libprotoc_la_DEPENDENCIES = libprotoc.map
++endif
+ libprotoc_la_SOURCES =                                         \
+   google/protobuf/compiler/code_generator.cc                   \
+   google/protobuf/compiler/command_line_interface.cc           \
+@@ -551,6 +563,9 @@ EXTRA_DIST =                                                   \
+   google/protobuf/compiler/ruby/ruby_generated_code_pb.rb      \
+   google/protobuf/compiler/package_info.h                      \
+   google/protobuf/compiler/zip_output_unittest.sh              \
++  libprotobuf-lite.map                                         \
++  libprotobuf.map                                              \
++  libprotoc.map                                                \
+   README.md
+ 
+ protoc_lite_outputs =                                          \
+diff --git a/src/libprotobuf-lite.map b/src/libprotobuf-lite.map
+new file mode 100644
+index 0000000..3915546
+--- /dev/null
++++ b/src/libprotobuf-lite.map
+@@ -0,0 +1,9 @@
++{
++  global:
++    extern "C++" {
++      *google*;
++    };
++
++  local:
++    *;
++};
+diff --git a/src/libprotobuf.map b/src/libprotobuf.map
+new file mode 100644
+index 0000000..3915546
+--- /dev/null
++++ b/src/libprotobuf.map
+@@ -0,0 +1,9 @@
++{
++  global:
++    extern "C++" {
++      *google*;
++    };
++
++  local:
++    *;
++};
+diff --git a/src/libprotoc.map b/src/libprotoc.map
+new file mode 100644
+index 0000000..3915546
+--- /dev/null
++++ b/src/libprotoc.map
+@@ -0,0 +1,9 @@
++{
++  global:
++    extern "C++" {
++      *google*;
++    };
++
++  local:
++    *;
++};
diff -Nru protobuf-3.0.0/debian/patches/series protobuf-3.0.0/debian/patches/series
--- protobuf-3.0.0/debian/patches/series	2016-12-10 10:07:55.000000000 +0200
+++ protobuf-3.0.0/debian/patches/series	2017-03-16 11:53:59.000000000 +0200
@@ -6,4 +6,4 @@
 s390x.patch
 sparc64.patch
 python3_long_fix.patch
-fix-reload.diff
+Hide-unnecessary-exported-library-symbols.patch