add launchpad bug reports without comments

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+file transfer over cifs to 64bit guest corrupts large files
+
+qemu 4.0 compiled fom source.
+vm called by
+qemu-system-x86_64 -cpu qemu64 -smp 4 -m 4G -drive file=/data/images/slack14.2_64bit_test.qcow2,format=qcow2 -cdrom /mnt/smb1/slackware/iso/slackware64-14.2-install-dvd.iso -boot c -net nic,macaddr=02:00:00:11:11:17,model=i82551 -net bridge,br=br0 -enable-kvm -k en-gb -display vnc=:3 -monitor telnet:localhost:7103,server,nowait,nodelay
+
+copying large files eg 2.4gb or reading them on a cifs mount in the guest causes corruption every time. For smaller files 40-60mb corruption is more than 50% of the time. tested by md5sum on cifs server, or on host machine vs. on guest vm.
+corruption is seen only with 64bit guest using cifs with i82551 emulated network device
+ie. 32bit guest using cifs with i82551 emulated network device gives no corruption.
+
+changing the emulated device to vmxnet3 removes the data corruption (see below)
+
+qemu-system-x86_64 -cpu qemu64 -smp 4 -m 4G -drive file=/data/images/slack14.2_64bit_test.qcow2,format=qcow2 -cdrom /mnt/smb1/slackware/iso/slackware64-14.2-install-dvd.iso -boot c -net nic,macaddr=02:00:00:11:11:17,model=vmxnet3 -net bridge,br=br0 -enable-kvm -k en-gb -display vnc=:3 -monitor telnet:localhost:7103,server,nowait,nodelay
+
+this corruption is repeatable. ie. I created new vm, call using top example, installed 64bit linux, mounted cifs share and copied 2.4gb file to /tmp then run md5sum "filecopied"
+the md5sum is different every time. copy same file to the host, or to a 32bit guest with the same virtual network device and bridge and md5sums are correct. The host pysical network adapter is
+lspci|grep Ether
+1e:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 11)
+
+physically connected via gigabit ethernet to cifs server (via gigabit switch)
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