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[Bug 1714859] Re: oops in 4.4.0-62-generic (ppc64le)

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>
Date: Mon, 11 Sep 2017 14:41:42 -0000
Reply-to: Bug 1714859 <1714859@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Changed in: linux (Ubuntu)
       Status: Incomplete => Triaged

** Changed in: linux (Ubuntu Xenial)
       Status: Confirmed => Triaged

** Also affects: linux (Ubuntu Artful)
   Importance: Medium
       Status: Triaged

** Also affects: linux (Ubuntu Zesty)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Zesty)
       Status: New => Triaged

** Changed in: linux (Ubuntu Zesty)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1714859

Title:
  oops in 4.4.0-62-generic (ppc64le)

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged
Status in linux source package in Zesty:
  Triaged
Status in linux source package in Artful:
  Triaged

Bug description:
  Sep  1 14:23:30 p87 kernel: [17274563.423972] device vnet2 entered promiscuous mode
  Sep  1 14:23:30 p87 kernel: [17274563.436101] br0: port 4(vnet2) entered forwarding state
  Sep  1 14:23:30 p87 kernel: [17274563.436113] br0: port 4(vnet2) entered forwarding state
  Sep  1 14:23:31 p87 kernel: [17274564.005034] audit: type=1400 audit(1504239811.140:793): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="libvirt-435e8619-e460-4c31-98b9-01dc8eab0cc5" pid=18952 comm="apparmor_parser"
  Sep  1 14:23:31 p87 kernel: [17274564.019911] audit: type=1400 audit(1504239811.156:794): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="libvirt-435e8619-e460-4c31-98b9-01dc8eab0cc5//qemu_bridge_helper" pid=18952 comm="apparmor_parser"
  Sep  1 14:23:31 p87 kernel: [17274564.324291] KVM guest htab at c0000079a1000000 (order 29), LPID 3
  Sep  1 14:23:45 p87 kernel: [17274578.483572] br0: port 4(vnet2) entered forwarding state
  Sep  1 14:26:53 p87 kernel: [17274766.572284] br0: port 4(vnet2) entered disabled state
  Sep  1 14:26:53 p87 kernel: [17274766.579930] device vnet2 left promiscuous mode
  Sep  1 14:26:53 p87 kernel: [17274766.579932] br0: port 4(vnet2) entered disabled state
  Sep  1 14:26:54 p87 kernel: [17274767.303109] audit: type=1400 audit(1504240014.441:795): apparmor="STATUS" operation="profile_remove" profile="unconfined" name="libvirt-435e8619-e460-4c31-98b9-01dc8eab0cc5" pid=22668 comm="apparmor_parser"
  Sep  1 14:26:56 p87 kernel: [17274768.917394] audit: type=1400 audit(1504240016.053:796): apparmor="STATUS" operation="profile_load" profile="unconfined" name="libvirt-435e8619-e460-4c31-98b9-01dc8eab0cc5" pid=22672 comm="apparmor_parser"
  Sep  1 14:26:56 p87 kernel: [17274768.917673] audit: type=1400 audit(1504240016.053:797): apparmor="STATUS" operation="profile_load" profile="unconfined" name="libvirt-435e8619-e460-4c31-98b9-01dc8eab0cc5//qemu_bridge_helper" pid=22672 comm="apparmor_parser"
  Sep  1 14:26:56 p87 kernel: [17274768.982783] device vnet2 entered promiscuous mode
  Sep  1 14:26:56 p87 kernel: [17274768.994891] br0: port 4(vnet2) entered forwarding state
  Sep  1 14:26:56 p87 kernel: [17274768.994902] br0: port 4(vnet2) entered forwarding state
  Sep  1 14:26:56 p87 kernel: [17274769.535982] audit: type=1400 audit(1504240016.673:798): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="libvirt-435e8619-e460-4c31-98b9-01dc8eab0cc5" pid=22702 comm="apparmor_parser"
  Sep  1 14:26:56 p87 kernel: [17274769.546719] audit: type=1400 audit(1504240016.685:799): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="libvirt-435e8619-e460-4c31-98b9-01dc8eab0cc5//qemu_bridge_helper" pid=22702 comm="apparmor_parser"
  Sep  1 14:26:57 p87 kernel: [17274769.861666] KVM guest htab at c0000079a1000000 (order 29), LPID 3
  Sep  1 14:27:11 p87 kernel: [17274784.050382] br0: port 4(vnet2) entered forwarding state
  Sep  1 14:28:30 p87 kernel: [17274863.605174] Unable to handle kernel paging request for data at address 0x00000008
  Sep  1 14:28:30 p87 kernel: [17274863.605188] Faulting instruction address: 0xc00000000044edcc
  Sep  1 14:28:30 p87 kernel: [17274863.605195] Oops: Kernel access of bad area, sig: 11 [#1]
  Sep  1 14:28:30 p87 kernel: [17274863.605199] SMP NR_CPUS=2048 NUMA PowerNV
  Sep  1 14:28:30 p87 kernel: [17274863.605206] Modules linked in: tcp_diag inet_diag ebtable_filter ebtables binfmt_misc veth xfrm_user xfrm_algo vhost_net vhost macvtap macvlan xt_CHECKSUM iptable_mangle ipt_REJECT nf_reject_ipv4 xt_tcpudp ip6table_filter ip6_tables ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter ip_tables xt_conntrack x_tables nf_nat nf_conntrack br_netfilter overlay bridge stp llc kvm_hv uio_pdrv_genirq powernv_rng ibmpowernv vmx_crypto leds_powernv uio ipmi_powernv ipmi_msghandler kvm_pr kvm autofs4 xfs btrfs raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid0 multipath linear raid10 raid1 ses enclosure mlx4_en be2net lpfc mlx4_core vxlan ip6_udp_tunnel scsi_transport_fc udp_tunnel ipr [last unloaded: ebtables]
  Sep  1 14:28:30 p87 kernel: [17274863.605294] CPU: 24 PID: 19018 Comm: sshfs Not tainted 4.4.0-62-generic #83-Ubuntu
  Sep  1 14:28:30 p87 kernel: [17274863.605300] task: c000001fc9c7c8e0 ti: c000001fe4c10000 task.ti: c000001fe4c10000
  Sep  1 14:28:30 p87 kernel: [17274863.605306] NIP: c00000000044edcc LR: c00000000044ede0 CTR: c000000000108b20
  Sep  1 14:28:30 p87 kernel: [17274863.605311] REGS: c000001fe4c139a0 TRAP: 0300   Not tainted  (4.4.0-62-generic)
  Sep  1 14:28:30 p87 kernel: [17274863.605315] MSR: 9000000000009033 <SF,HV,EE,ME,IR,DR,RI,LE>  CR: 24000424  XER: 00000000
  Sep  1 14:28:30 p87 kernel: [17274863.605330] CFAR: c000000000008468 DAR: 0000000000000008 DSISR: 42000000 SOFTE: 1
  Sep  1 14:28:30 p87 kernel: [17274863.605330] GPR00: c00000000044ede0 c000001fe4c13c20 c0000000015f7600 c000001fda681000
  Sep  1 14:28:30 p87 kernel: [17274863.605330] GPR04: c00000006377fa00 0000000000000001 0000000000000000 0000000000000000
  Sep  1 14:28:30 p87 kernel: [17274863.605330] GPR08: 0000000000000000 c00000006377fa00 c000001fe4c13c90 0000000000000c01
  Sep  1 14:28:30 p87 kernel: [17274863.605330] GPR12: c000000000108b20 c00000000fb4e400 0000000000000000 0000000000000000
  Sep  1 14:28:30 p87 kernel: [17274863.605330] GPR16: 0000000000000000 0000000000000000 c00000003e213560 0000000000000000
  Sep  1 14:28:30 p87 kernel: [17274863.605330] GPR20: c000001fe4c13c90 c000001fda6815b0 c000001fe4c13ca0 c000001fda681000
  Sep  1 14:28:30 p87 kernel: [17274863.605330] GPR24: ffffffffffffff99 0000000000000400 0000000000000000 c000001fda681000
  Sep  1 14:28:30 p87 kernel: [17274863.605330] GPR28: ffffffffffffff99 0000000000000080 0000000000000100 c000001fe4c13c90
  Sep  1 14:28:30 p87 kernel: [17274863.605393] NIP [c00000000044edcc] end_requests+0x8c/0xd0
  Sep  1 14:28:30 p87 kernel: [17274863.605398] LR [c00000000044ede0] end_requests+0xa0/0xd0
  Sep  1 14:28:30 p87 kernel: [17274863.605401] Call Trace:
  Sep  1 14:28:30 p87 kernel: [17274863.605405] [c000001fe4c13c20] [c00000000044ede0] end_requests+0xa0/0xd0 (unreliable)
  Sep  1 14:28:30 p87 kernel: [17274863.605412] [c000001fe4c13c70] [c00000000044fb90] fuse_abort_conn+0x3a0/0x490
  Sep  1 14:28:30 p87 kernel: [17274863.605418] [c000001fe4c13d20] [c00000000044fd48] fuse_dev_release+0xc8/0xd0
  Sep  1 14:28:30 p87 kernel: [17274863.605426] [c000001fe4c13d50] [c0000000002e65c0] __fput+0xe0/0x310
  Sep  1 14:28:30 p87 kernel: [17274863.605433] [c000001fe4c13db0] [c0000000000e3e50] task_work_run+0xf0/0x130
  Sep  1 14:28:30 p87 kernel: [17274863.605440] [c000001fe4c13e00] [c0000000000178d4] do_notify_resume+0xc4/0xd0
  Sep  1 14:28:30 p87 kernel: [17274863.605446] [c000001fe4c13e30] [c000000000009838] ret_from_except_lite+0x64/0x68
  Sep  1 14:28:30 p87 kernel: [17274863.605451] Instruction dump:
  Sep  1 14:28:30 p87 kernel: [17274863.605455] 7d08e878 7d0051ad 40c2fff4 60420000 7d0050a8 7d08f078 7d0051ad 40c2fff4
  Sep  1 14:28:30 p87 kernel: [17274863.605464] e9490008 e9090000 7d244b78 7f63db78 <f9480008> f90a0000 f9290000 f9290008
  Sep  1 14:28:30 p87 kernel: [17274863.605479] ---[ end trace c395103c4016f0f2 ]---
  Sep  1 14:28:30 p87 kernel: [17274863.634036]

  
  make -j 800
  on a sshfs connected source directory (the source was a KVM guest running on the local machine). the guest (a BE guest) was rather stalled at the time and ended up hard powering off on it. The oops occurred about the same time.

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