[Bug 237441] Virtio net consistently truncates last byte of a fetch xfer with > 8956 bytes of payload

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=237441

Christoph Kliemann <freebsd-bugs at cklie.de> changed:

           What    |Removed                     |Added
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                 CC|                            |freebsd-bugs at cklie.de

--- Comment #4 from Christoph Kliemann <freebsd-bugs at cklie.de> ---
I can reproduce this on macOS 10.13.6 (17G7024) High Sierra with qemu 4.0.0 and
a FreeBSD 12.0-RELEASE (p1-p6) guest.

My packer freebsd builder failed because of this issue.
I have tested this for a while with the same template.

In most cases, the builder fails (truncated base.txz or truncated pkgng
packages).
Occasionally, the download and installation are successful.

I booted one of these successfully created images with qemu and ran additional
tests.

Test #1: fetch http://www.google.de
The last byte is missing.

Test #2: ping google.de
PING google.de (172.217.23.163): 56 data bytes
64 bytes from 172.217.23.163: icmp_seq=0 ttl=255 time=622018725671.832 ms
wrong data byte #8 should be 0x8 but was 0xc0
[...]

Test #3: pkg install curl wget
One successful attempt after many truncated downloads.

Test #4: curl http://www.google.de
No issues

Test #5: wget http://www.google.de
No issues

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