Date: Sun, 21 Apr 2019 16:06:25 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 237441] Virtio net consistently truncates last byte of a fetch xfer with > 8956 bytes of payload Message-ID: <bug-237441-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D237441 Bug ID: 237441 Summary: Virtio net consistently truncates last byte of a fetch xfer with > 8956 bytes of payload Product: Base System Version: 12.0-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: bugmenot@mailinator.com Reading 215737 carefully, I couldn't decide if this was the same problem but ultimately decided it wasn't. Environment: OSX High Sierra running QEMU and the 12.0 release qcow2 image published on the FreeBSD site. Qemu command line: qemu-system-x86_64 -m 2048 -hda FreeBSD-12.0-RELEASE-amd64.qcow2 -netdev user,id=3Dmynet0,hostfwd=3Dtcp:127.0.0.1:7722-:22 -device virtio-net-pci,netdev=3Dmynet0 Trying to install pkg fails. If you do the following command: fetch http://pkg.freebsd.org/FreeBSD:12:amd64/latest/Latest/pkg.txz you will consistently get the following (Note: with or without [TR]XCSUM enabled): fetch: pkg.txz appears to be truncated: 3395051/3395052 bytes If you download the full package and use dd to grab all but the last byte, = the SHA256 sums match so the data's not corrupted, just missing the final byte = (a 'Z') character. Furthermore, if you run tcpdump in the guest against the vtnet0 interface while it's transferring you can see the final 'Z' byte in = the final packet so qemu is getting the data to the guest. If you then ktrace = the fetch process, you'll see that its final read *doesn't* have the 'Z' which rules out a bug in fetch/libfetch. Using fetch to test for sizing, I started downloading packages at the jumbo frame boundary and found that packages <=3D 8956 bytes work and >=3D 8960 e= xhibit the failure. --=20 You are receiving this mail because: You are the assignee for the bug.=
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