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Diffstat (limited to 'gitlab/issues/target_missing/host_missing/accel_missing/2951.toml')
| -rw-r--r-- | gitlab/issues/target_missing/host_missing/accel_missing/2951.toml | 33 |
1 files changed, 0 insertions, 33 deletions
diff --git a/gitlab/issues/target_missing/host_missing/accel_missing/2951.toml b/gitlab/issues/target_missing/host_missing/accel_missing/2951.toml deleted file mode 100644 index 6a303d53..00000000 --- a/gitlab/issues/target_missing/host_missing/accel_missing/2951.toml +++ /dev/null @@ -1,33 +0,0 @@ -id = 2951 -title = "First byte of USB NIC is hardcoded to 0x40" -state = "opened" -created_at = "2025-05-06T16:08:57.518Z" -closed_at = "n/a" -labels = ["USB"] -url = "https://gitlab.com/qemu-project/qemu/-/issues/2951" -host-os = "Debian 13" -host-arch = "x86_64" -qemu-version = "10.0.0" -guest-os = "n/a" -guest-arch = "n/a" -description = """Incus recently added support for USB attached network interfaces. -As with any network device, we generate a MAC address (using our MAC OUI) and allow the user to override that to a value of their choice. - -That's when we noticed that no matter what MAC address we set, the resulting MAC always has the prefix swapped to "40:". Looking into the code, this is done on purpose here: - -https://gitlab.com/qemu-project/qemu/-/blob/master/hw/usb/dev-network.c?ref_type=heads#L1386 - -Unfortunately there is no comment in the code or in any of the commits touching that code as far as why that is. - -We've also looked at the libvirt code handling those devices and that code seems to also assume that a user provided MAC will be correctly passed through to the guest, no mention of the odd prefix override. - -This is a bit concerning as there are valid IEEE OUI with the "40:" prefix. -So this means that QEMU may be generating collisions with actual physical MAC addresses... - -For a few months now, I've been applying this small patch to my own Incus packages (which bundle QEMU) and haven't heard or seen any obvious issue from the change. - -https://github.com/zabbly/incus/blob/daily/patches/qemu-0001-usb-net-mac.patch - -Does anyone know why this hardcoded MAC address prefix exists?""" -reproduce = "n/a" -additional = "n/a" |