This bug affects me too. I'm working on a Tyan Power8 machine (PPC64el) with Ubuntu 16.04.1 and 10GB network cards using the bnx2x driver. A configured network bridge on my machine results in a kernel oops if I trigger a shutdown or reboot, see attachment. I installed the 4.8.0-040800-generic kernel and now the shutdown or reboot works fine, so I would recommend using the LTS Enablement Stack (linux-generic-lts-yakkety) when it's available.
** Attachment added: "shutdown-problem-power8" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1616107/+attachment/4753518/+files/shutdown-problem-power8 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to bridge-utils in Ubuntu. https://bugs.launchpad.net/bugs/1616107 Title: Kernel oops + system freeze on network-bridge shutdown Status in bridge-utils package in Ubuntu: Confirmed Status in linux package in Ubuntu: Confirmed Status in bridge-utils source package in Xenial: Confirmed Status in linux source package in Xenial: Confirmed Status in bridge-utils source package in Yakkety: Confirmed Bug description: A Kernel oops leaves Ubuntu 16.04 unusable when a network bridge is brought down on a HPE 530SFP+ 10GBit NIC that uses bnx2x as a driver. This error does not appear in Ubuntu 14.04 however. The error is reproducible whenever issuing the commands "shutdown", "service networking stop" or "brctl delbr br0". Manually creating the bridge and subsequently bringing it down results in the same error. /var/log/kern.log: [...] Aug 23 15:09:46 base1 kernel: [ 617.996677] device ens1f0 left promiscuous mode Aug 23 15:09:46 base1 kernel: [ 617.996699] br0: port 1(ens1f0) entered disabled state Aug 23 15:09:46 base1 kernel: [ 617.996730] BUG: unable to handle kernel NULL pointer dereference at 00000000000000d2 Aug 23 15:09:46 base1 kernel: [ 618.008306] IP: [<ffffffffc0486d78>] __vlan_flush+0x18/0x60 [bridge] Aug 23 15:09:46 base1 kernel: [ 618.020549] PGD 10374c0067 PUD 1033927067 PMD 0 Aug 23 15:09:46 base1 kernel: [ 618.032773] Oops: 0002 [#1] SMP Aug 23 15:09:46 base1 kernel: [ 618.044434] Modules linked in: nls_iso8859_1 ipmi_ssif intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass sb_edac edac_core joydev bridge stp llc input_leds hpilo lpc_ich ioatdma ipmi_si ipmi_msghandler shpchp mac_hid acpi_power_meter ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 hid_generic crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd igb usbhid hid bnx2x dca ahci i2c_algo_bit vxlan libahci ip6_udp_tunnel udp_tunnel ptp pps_core mdio libcrc32c wmi fjes Aug 23 15:09:46 base1 kernel: [ 618.058563] CPU: 3 PID: 4049 Comm: brctl Not tainted 4.4.0-34-generic #53-Ubuntu Aug 23 15:09:46 base1 kernel: [ 618.058564] Hardware name: HP ProLiant DL120 Gen9/ProLiant DL120 Gen9, BIOS P86 05/05/2016 Aug 23 15:09:46 base1 kernel: [ 618.058574] task: ffff881030676040 ti: ffff8810341e4000 task.ti: ffff8810341e4000 Aug 23 15:09:46 base1 kernel: [ 618.058576] RIP: 0010:[<ffffffffc0486d78>] [<ffffffffc0486d78>] __vlan_flush+0x18/0x60 [bridge] Aug 23 15:09:46 base1 kernel: [ 618.058754] RSP: 0018:ffff8810341e7d68 EFLAGS: 00010206 Aug 23 15:09:46 base1 kernel: [ 618.058769] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 Aug 23 15:09:46 base1 kernel: [ 618.058774] RDX: ffff881038470848 RSI: 0000000000000000 RDI: 0000000000000000 Aug 23 15:09:46 base1 kernel: [ 618.058775] RBP: ffff8810341e7d78 R08: 0000000000000000 R09: ffffffff8170d949 Aug 23 15:09:46 base1 kernel: [ 618.058776] R10: ffffea0000d61340 R11: ffff8810329d2c00 R12: 00000000000000c0 Aug 23 15:09:46 base1 kernel: [ 618.058777] R13: ffff881030044000 R14: ffff881038470840 R15: 0000000000000000 Aug 23 15:09:46 base1 kernel: [ 618.058782] FS: 00007f9aebc94700(0000) GS:ffff88107fcc0000(0000) knlGS:0000000000000000 Aug 23 15:09:46 base1 kernel: [ 618.058789] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Aug 23 15:09:46 base1 kernel: [ 618.058790] CR2: 00000000000000d2 CR3: 000000102fe83000 CR4: 00000000001406e0 Aug 23 15:09:46 base1 kernel: [ 618.058802] Stack: Aug 23 15:09:46 base1 kernel: [ 618.058806] 0000000000000000 ffff8810356a4c00 ffff8810341e7d98 ffffffffc0489258 Aug 23 15:09:46 base1 kernel: [ 618.058822] ffff8810356a4c00 ffff881038470840 ffff8810341e7dc0 ffffffffc0479bd8 Aug 23 15:09:46 base1 kernel: [ 618.058825] ffff881038470838 ffff881038470848 ffff881038470000 ffff8810341e7df8 Aug 23 15:09:46 base1 kernel: [ 618.058827] Call Trace: Aug 23 15:09:46 base1 kernel: [ 618.058863] [<ffffffffc0489258>] nbp_vlan_flush+0x28/0x65 [bridge] Aug 23 15:09:46 base1 kernel: [ 618.058870] [<ffffffffc0479bd8>] del_nbp+0x98/0x130 [bridge] Aug 23 15:09:46 base1 kernel: [ 618.058889] [<ffffffffc0479cb2>] br_dev_delete+0x42/0xb0 [bridge] Aug 23 15:09:46 base1 kernel: [ 618.058895] [<ffffffffc0479dea>] br_del_bridge+0x4a/0x70 [bridge] Aug 23 15:09:46 base1 kernel: [ 618.058911] [<ffffffffc047b4e3>] br_ioctl_deviceless_stub+0x153/0x230 [bridge] Aug 23 15:09:46 base1 kernel: [ 618.058984] [<ffffffff81345533>] ? security_file_alloc+0x33/0x50 Aug 23 15:09:46 base1 kernel: [ 618.059095] [<ffffffff81704625>] sock_ioctl+0x215/0x290 Aug 23 15:09:46 base1 kernel: [ 618.059121] [<ffffffff81220c3f>] do_vfs_ioctl+0x29f/0x490 Aug 23 15:09:46 base1 kernel: [ 618.059223] [<ffffffff8106b554>] ? __do_page_fault+0x1b4/0x400 Aug 23 15:09:46 base1 kernel: [ 618.059264] [<ffffffff8122b525>] ? fd_install+0x25/0x30 Aug 23 15:09:46 base1 kernel: [ 618.059266] [<ffffffff81220ea9>] SyS_ioctl+0x79/0x90 Aug 23 15:09:46 base1 kernel: [ 618.059359] [<ffffffff8182def2>] entry_SYSCALL_64_fastpath+0x16/0x71 Aug 23 15:09:46 base1 kernel: [ 618.059369] Code: 1b c1 c0 e9 30 ff ff ff 90 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 54 53 49 89 fc 31 c0 49 81 c4 c0 00 00 00 <66> 89 87 d2 00 00 00 48 8b 87 c0 00 00 00 49 39 c4 48 8b 08 74 Aug 23 15:09:46 base1 kernel: [ 618.059514] RIP [<ffffffffc0486d78>] __vlan_flush+0x18/0x60 [bridge] Aug 23 15:09:46 base1 kernel: [ 618.059522] RSP <ffff8810341e7d68> Aug 23 15:09:46 base1 kernel: [ 618.059523] CR2: 00000000000000d2 Aug 23 15:09:46 base1 kernel: [ 618.060149] ---[ end trace f915551f71712a3d ]--- [...] dmesg | grep bnx2x: [ 3.523820] bnx2x: QLogic 5771x/578xx 10/20-Gigabit Ethernet Driver bnx2x 1.712.30-0 (2014/02/10) [ 3.544982] bnx2x 0000:03:00.0: msix capability found [ 3.549671] bnx2x 0000:03:00.0: part number 0-0-0-0 [ 3.682788] bnx2x 0000:03:00.1: msix capability found [ 3.685014] bnx2x 0000:03:00.1: part number 0-0-0-0 [ 4.588510] bnx2x 0000:03:00.0 ens1f0: renamed from eth1 [ 4.688509] bnx2x 0000:03:00.1 ens1f1: renamed from eth2 [ 10.104242] bnx2x 0000:03:00.0 ens1f0: failed to initialize vlan filtering on this port [ 10.713654] bnx2x 0000:03:00.0 ens1f0: using MSI-X IRQs: sp 47 fp[0] 50 ... fp[5] 55 [ 11.946057] bnx2x 0000:03:00.0 ens1f0: NIC Link is Up, 10000 Mbps full duplex, Flow control: ON - receive & transmit /etc/network/interfaces: # The loopback network interface auto lo iface lo inet loopback # The primary 10GbE network interface auto ens1f0 iface ens1f0 inet manual # The secondary 10GbE network interface # auto ens1f1 # iface ens1f1 inet manual # Bridged network interface auto br0 iface br0 inet static address 192.168.xxx.xxx netmask 255.255.255.0 network 192.168.xxx.0 broadcast 192.168.xxx.255 gateway 192.168.xxx.xxx dns-nameservers 192.168.xxx.xxx 192.168.xxx.xxx dns-search xxx bridge_ports ens1f0 bridge_hello 2 bridge_fd 9 bridge_maxage 12 bridge_stp off lsb_release -rd: Description: Ubuntu 16.04.1 LTS Release: 16.04 cat /proc/version_signature: Ubuntu 4.4.0-34.53-generic 4.4.15 apt-cache policy bridge-utils: bridge-utils: Installed: 1.5-9ubuntu1 Candidate: 1.5-9ubuntu1 Version table: *** 1.5-9ubuntu1 500 500 http://de.archive.ubuntu.com/ubuntu xenial/main amd64 Packages 100 /var/lib/dpkg/status --- ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 Dependencies: gcc-6-base 6.0.1-0ubuntu1 libc6 2.23-0ubuntu3 libgcc1 1:6.0.1-0ubuntu1 DistroRelease: Ubuntu 16.04 InstallationDate: Installed on 2016-08-22 (1 days ago) InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) Package: linux PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15 Tags: xenial Uname: Linux 4.4.0-34-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True --- ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 Dependencies: gcc-6-base 6.0.1-0ubuntu1 libc6 2.23-0ubuntu3 libgcc1 1:6.0.1-0ubuntu1 DistroRelease: Ubuntu 16.04 InstallationDate: Installed on 2016-08-22 (1 days ago) InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) Package: linux PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15 Tags: xenial Uname: Linux 4.4.0-34-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bridge-utils/+bug/1616107/+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
