Ticket has been moved here (thanks, Vladislav!): https://gitlab.com/qemu-project/qemu/-/issues/335 ... thus I'm closing this on Launchpad now.
** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #335 https://gitlab.com/qemu-project/qemu/-/issues/335 ** Changed in: qemu Status: Incomplete => Invalid -- 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: Invalid 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 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1922102/+subscriptions
