The QEMU project is currently moving its bug tracking to another system.
For this we need to know which bugs are still valid and which could be
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If the bug has already been fixed in the latest upstream version of QEMU,
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If it is not fixed yet and you think that this bug report here is still
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Thank you and sorry for the inconvenience.
** Changed in: qemu
Status: New => Incomplete
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1922102
Title:
Broken tap networking on macOS host
Status in QEMU:
Incomplete
Bug description:
Building QEMU with GLib newer than 2.58.3 corrupts tap networking on macOS
hosts.
Tap device was provided by Tun/Tap kernel extension installed from brew:
brew install tuntap
Checked revisions:
553032d (v5.2.0)
6d40ce0 (v6.0.0-rc1)
Host:
MacBook Pro (Retina, 15-inch, Mid 2015)
macOS Catalina 10.15.6 (19G2021)
Guest:
Linux Ubuntu 4.4.0-206-generic x86_64
Also tested macOS Catalina 10.15.7 as a guest, the behaviour is the same.
QEMU command line:
qemu-system-x86_64 \
-drive file=hdd.qcow2,if=virtio,format=qcow2 \
-m 3G \
-nic tap,script=tap-up.sh
tap-up.sh:
#!/bin/sh
TAPDEV="$1"
BRIDGEDEV="bridge0"
ifconfig "$BRIDGEDEV" addm "$TAPDEV"
Enabling/disabling Hypervisor.Framework acceleration (`-accel hvf`)
has no effect.
How to reproduce:
1. Build & install GLib > 2.58.3 (tested 2.60.7)
2. Build qemu-system-x86_64 with GLib > 2.58.3
3. Boot any guest with tap networking enabled
4. See that the external network is inaccessible
Hotfix:
1. Build & install GLib 2.58.3
2. Build qemu-system-x86_64 with GLib 2.58.3
3. Boot any guest with tap networking enabled
4. See that the external network is accessible, everything is working as
expected
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