diff --git a/build-aux/check.mk b/build-aux/check.mk
index 10239907..9210f626 100644
--- a/build-aux/check.mk
+++ b/build-aux/check.mk
@@ -1,20 +1,20 @@
-VALGRIND = $(VALGRIND_EXEC) -q --error-exitcode=127
+VALGRIND = $(VALGRIND_EXEC) -q --error-exitcode=127 --gen-suppressions=all
 
 MEMCHECK = $(VALGRIND) --track-fds=yes --leak-check=full --suppressions=$(abs_top_srcdir)/build-aux/knet_valgrind_memcheck.supp
 HELGRIND = $(VALGRIND) --tool=helgrind --suppressions=$(abs_top_srcdir)/build-aux/knet_valgrind_helgrind.supp
 
 check-memcheck: $(check_PROGRAMS)
 if HAS_VALGRIND
 	export KNETMEMCHECK=yes && \
 		$(MAKE) check LOG_COMPILE="libtool --mode=execute $(MEMCHECK)"
 else
 	@echo valgrind not available on this platform
 endif
 
 check-helgrind: $(check_PROGRAMS)
 if HAS_VALGRIND
 	export KNETHELGRIND=yes && \
 		$(MAKE) check LOG_COMPILE="libtool --mode=execute $(HELGRIND)"
 else
 	@echo valgrind not available on this platform
 endif
diff --git a/build-aux/knet_valgrind_memcheck.supp b/build-aux/knet_valgrind_memcheck.supp
index efd5eba7..bb182dc3 100644
--- a/build-aux/knet_valgrind_memcheck.supp
+++ b/build-aux/knet_valgrind_memcheck.supp
@@ -1,461 +1,478 @@
 {
    lzma internal stuff
    Memcheck:Cond
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Value8
    fun:lzma_stream_header_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    fun:lzma_crc32
    fun:lzma_stream_header_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Value8
    fun:lzma_crc32
    fun:lzma_stream_header_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_block_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Value8
    fun:lzma_block_header_encode
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_block_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_block_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_block_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Value8
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_block_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    fun:is_overlap
    fun:memcpy@@GLIBC_2.14
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_block_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
 }
 {
    lzma internal stuff
    Memcheck:Cond
    fun:memcpy@@GLIBC_2.14
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_block_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
 }
 {
    lzma internal stuff
    Memcheck:Value8
    fun:memcpy@@GLIBC_2.14
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_block_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
 }
 {
    lzma internal stuff
    Memcheck:Value8
    fun:lzma_vli_encode
    fun:lzma_filter_flags_encode
    fun:lzma_block_header_encode
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_block_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Value8
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_filter_flags_encode
    fun:lzma_block_header_encode
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_block_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    fun:memset
    fun:lzma_block_header_encode
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_block_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Value8
    fun:memset
    fun:lzma_block_header_encode
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_block_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    fun:lzma_block_unpadded_size
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    fun:lzma_index_append
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    fun:lzma_vli_size
    fun:lzma_index_append
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    fun:lzma_index_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_index_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Value8
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_index_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    fun:lzma_vli_encode
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_index_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Value8
    fun:lzma_vli_encode
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_index_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    fun:lzma_crc32
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_index_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Value8
    fun:lzma_crc32
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_index_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Value8
    fun:lzma_stream_footer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Value8
    fun:lzma_crc32
    fun:lzma_stream_footer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    fun:lzma_crc32
    fun:lzma_stream_footer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
    fun:clone
 }
 {
    lzma internal stuff
    Memcheck:Cond
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    obj:/usr/lib64/liblzma.so.5.2.2
    fun:lzma_block_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
 }
 {
    lzma internal stuff (Debian Unstable)
    Memcheck:Cond
    obj:/lib/x86_64-linux-gnu/liblzma.so.5.2.2
    obj:/lib/x86_64-linux-gnu/liblzma.so.5.2.2
    obj:/lib/x86_64-linux-gnu/liblzma.so.5.2.2
    obj:/lib/x86_64-linux-gnu/liblzma.so.5.2.2
    fun:lzma_block_buffer_encode
    fun:lzma_stream_buffer_encode
    fun:lzma_easy_buffer_encode
    fun:lzma_compress
    fun:_parse_recv_from_sock
    fun:_handle_send_to_links
    fun:_handle_send_to_links_thread
    fun:start_thread
 }
+{
+   lzma internal stuff (Ubuntu 17.10 i386)
+   Memcheck:Cond
+   obj:/lib/i386-linux-gnu/liblzma.so.5.2.2
+   obj:/lib/i386-linux-gnu/liblzma.so.5.2.2
+   obj:/lib/i386-linux-gnu/liblzma.so.5.2.2
+   obj:/lib/i386-linux-gnu/liblzma.so.5.2.2
+   obj:/lib/i386-linux-gnu/liblzma.so.5.2.2
+   obj:/lib/i386-linux-gnu/liblzma.so.5.2.2
+   fun:lzma_stream_buffer_encode
+   fun:lzma_easy_buffer_encode
+   fun:lzma_compress
+   fun:_parse_recv_from_sock
+   fun:_handle_send_to_links
+   fun:_handle_send_to_links_thread
+   fun:start_thread
+}