uhd: dont pass 0 sample buffs to converter (avoid segfaults)

2 files changed, 6 insertions, 2 deletions

diff --git a/host/lib/transport/super_recv_packet_handler.hpp b/host/lib/transport/super_recv_packet_handler.hpp
index 48b0acdb9..57aae96b1 100644
--- a/host/lib/transport/super_recv_packet_handler.hpp
+++ b/host/lib/transport/super_recv_packet_handler.hpp
@@ -523,7 +523,9 @@ private:
             }
 
             //copy-convert the samples from the recv buffer
-            _converter(buff_info.copy_buff, _io_buffs, nsamps_to_copy_per_io_buff, _scale_factor);
+            if (nsamps_to_copy_per_io_buff != 0) _converter(
+                buff_info.copy_buff, _io_buffs, nsamps_to_copy_per_io_buff, _scale_factor
+            );
 
             //update the rx copy buffer to reflect the bytes copied
             buff_info.copy_buff += bytes_to_copy;
diff --git a/host/lib/transport/super_send_packet_handler.hpp b/host/lib/transport/super_send_packet_handler.hpp
index 5696b5d39..c3ffcc861 100644
--- a/host/lib/transport/super_send_packet_handler.hpp
+++ b/host/lib/transport/super_send_packet_handler.hpp
@@ -239,7 +239,9 @@ private:
             otw_mem += if_packet_info.num_header_words32;
 
             //copy-convert the samples into the send buffer
-            _converter(_io_buffs, otw_mem, nsamps_per_buff, _scale_factor);
+            if (nsamps_per_buff != 0) _converter(
+                _io_buffs, otw_mem, nsamps_per_buff, _scale_factor
+            );
 
             //commit the samples to the zero-copy interface
             size_t num_bytes_total = (_header_offset_words32+if_packet_info.num_packet_words32)*sizeof(boost::uint32_t);