Comment 2 for bug 1914117

Apologies.

Host OS is Big Sur Mac OS X latest - with Xcode latest. Qemu is 5.2 - tar ball directly from the website.

- Compile Qemu on Mac OS/Big Sur - completely stock build : install Ninja, mkdir build && cd build && ../configure && make && make install
- But also the issue is with the binary in home-brew (e.g. brew install Qemu) - both methods get me to the same problem.

* Installed NetBSD/amd64 or i386 or OpenBSD/i386.
Qemu-image create -f raw image 10G
qmu-system-ARCH -m 256M -hda image -cdrom “netbsd.iso” -boot d -net user -net nic

(For i386 & amd64 I tend to add -nographic for the installer)

* Run the image:
Qmu-system-ARCH -m 256M -hda $IMAGE -net user -net nic

Also NetBSD/arm64 has the issue using their image.
qemu-system-aarch64 -M virt -cpu cortex-a53 -smp 4 -m 4g \
      -drive if=none,file=netbsd-disk-arm64.img,id=hd0 -device virtio-blk-device,drive=hd0 \
      -netdev type=user,id=net0 -device virtio-net-device,netdev=net0,mac=00:11:22:33:44:55 \
      -bios QEMU_EFI.fd -nographic

* The issue seems to be downloading large files.
In the host OS two files that seem to tickle the bug often are:

* ftp -a http://cpan.pair.com/src/5.0/perl-5.32.1.tar.xz
On NetBSD this file seems to be one byte shorter than it should be. On arm64 is was several bytes shorter.

* ftp -a ftp://ftp.isc.org/isc/bind9/9.16.11/bind-9.16.11.tar.xz
Also seems to tickle the bug

I saw this while trying to use pkgsrc on NetBSD. Saw this on Amd64, i386 and arm64. Tried OpenBSD to rule out NetBSD as the problem. OpenBSD/i386 sees the same issue (ftp returns short read and file is a couple of bytes smaller).

The screenshot is from amd64 - a fresh boot this morning running on a fairly idle host.

Kind regards
Chris