> Does the MAC actually change each boot, or does udev assign the same one > each boot? - Udev assign same one each boot
> Where is this happening? How are you configuring this? - I am using a VM managed by VMWare ESXI . It automatically assigns a mac address while creating the machine as attached in screenshot Attached the debug output ** Attachment added: "mac address" https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/2104155/+attachment/5869435/+files/mac%20address.png -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/2104155 Title: systemd-udev interferes with MAC addresses of interfaces Status in systemd package in Ubuntu: Incomplete Status in systemd source package in Jammy: Incomplete Bug description: While configuring a system based on ubuntu 22.04 version , we found that a system-d udev rules assign a random mac address to one of the network interfaces . Kernel version uname -a 5.15.0-25-generic #25-Ubuntu SMP Wed Mar 30 15:54:22 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux Ubunutu version root@maglev-master-10-106-0-137:~# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 22.04.5 LTS Release: 22.04 Codename: jammy ip addr show output which shows the mac address has been changed ens192: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master management state UP group default qlen 1000 link/ether d2:29:6b:94:be:bd brd ff:ff:ff:ff:ff:ff permaddr 00:50:56:b8:ed:a0 altname enp11s0 d2:29:6b:94:be:bd is being randomly assigned while permanent address is 00:50:56:b8:ed:a0 root@maglev-master-10-106-0-137:~# ethtool -P ens192 Permanent address: 00:50:56:b8:ed:a0 PID: 1760 (snmpd) changed MAC to 00:00:00:00:00:00 PID: 1760 (snmpd) changed MAC to 00:00:00:00:00:00 PID: 15073 (systemd-udevd) changed MAC to d2:29:6b:94:be:bd PID: 15073 (systemd-udevd) changed MAC to d2:29:6b:94:be:bd PID: 15073 (systemd-udevd) changed MAC to d2:29:6b:94:be:bd PID: 15084 (ip) changed MAC to d2:29:6b:94:be:bd PID: 15084 (ip) changed MAC to d2:29:6b:94:be:bd bpftrace output Invoked kprobe:dev_set_mac_address_user with MAC d2:29:6b:94:be:bd Stack trace: dev_set_mac_address_user+1 rtnl_setlink+246 rtnetlink_rcv_msg+349 netlink_rcv_skb+83 rtnetlink_rcv+21 netlink_unicast+538 netlink_sendmsg+588 sock_sendmsg+98 __sys_sendto+275 __x64_sys_sendto+36 do_syscall_64+89 entry_SYSCALL_64_after_hwframe+68 systemd-udevd(7123) systemd-udevd(6656) Invoked kprobe:dev_set_mac_address with MAC d2:29:6b:94:be:bd Stack trace: dev_set_mac_address+1 do_setlink+2217 rtnl_setlink+246 rtnetlink_rcv_msg+349 netlink_rcv_skb+83 rtnetlink_rcv+21 netlink_unicast+538 netlink_sendmsg+588 sock_sendmsg+98 __sys_sendto+275 __x64_sys_sendto+36 do_syscall_64+89 entry_SYSCALL_64_after_hwframe+68 systemd-udevd(7123) systemd-udevd(6656) Invoked kprobe:bond_set_mac_address with MAC d2:29:6b:94:be:bd Stack trace: bond_set_mac_address+1 dev_set_mac_address_user+50 do_setlink+2217 rtnl_setlink+246 rtnetlink_rcv_msg+349 netlink_rcv_skb+83 rtnetlink_rcv+21 netlink_unicast+538 netlink_sendmsg+588 sock_sendmsg+98 __sys_sendto+275 __x64_sys_sendto+36 do_syscall_64+89 entry_SYSCALL_64_after_hwframe+68 ip(7137) sh(7135) python3(7013) twistd3(2045) web_install_ser(1959) Invoked kprobe:dev_set_mac_address with MAC d2:29:6b:94:be:bd Stack trace: dev_set_mac_address+1 do_set_master+146 do_setlink+684 __rtnl_newlink+1560 rtnl_newlink+73 rtnetlink_rcv_msg+349 netlink_rcv_skb+83 rtnetlink_rcv+21 netlink_unicast+538 netlink_sendmsg+588 sock_sendmsg+98 ____sys_sendmsg+590 ___sys_sendmsg+129 __sys_sendmsg+98 __x64_sys_sendmsg+29 do_syscall_64+89 entry_SYSCALL_64_after_hwframe+68 ip(7137) sh(7135) python3(7013) twistd3(2045) web_install_ser(1959) Invoked kprobe:vmxnet3_set_mac_addr with MAC d2:29:6b:94:be:bd Stack trace: vmxnet3_set_mac_addr+1 bond_enslave+1521 do_set_master+146 do_setlink+684 __rtnl_newlink+1560 rtnl_newlink+73 rtnetlink_rcv_msg+349 netlink_rcv_skb+83 rtnetlink_rcv+21 netlink_unicast+538 netlink_sendmsg+588 sock_sendmsg+98 ____sys_sendmsg+590 ___sys_sendmsg+129 __sys_sendmsg+98 __x64_sys_sendmsg+29 do_syscall_64+89 entry_SYSCALL_64_after_hwframe+68 Not able to understand why this systemd rule is triggering and assigning MAC address randomly while we have a permanent Mac configured for that network interface . We found this reported issue in systemd . https://github.com/systemd/systemd/issues/21185 https://github.com/systemd/systemd/commit/6d36464065601f79a352367cf099be8907d8f9aa are they reason we are also running into the issue and if so, how do we get away from this Other than setting MACAddressPolicy=none ? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/2104155/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
