Hi!

In an effort to avoid crashes due to this bug, I installed 4.5.0-0.bpo.1-amd64
last week. The server ran in the last week quite well with activated IPv6,
but today it crashed two times within 30 mins. 

Please find attached the syslog output send out via netconsole... 


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May 19 09:07:45 31.172.31.251 [300350.696476] BUG: unable to handle kernel 
May 19 09:07:45 31.172.31.251  at ffff880279ba40e6
May 19 09:07:45 31.172.31.251 [300350.696525] IP:
May 19 09:07:45 31.172.31.251  [<ffffffff8157d64c>] 
ndisc_send_redirect+0x44c/0x4d0
May 19 09:07:45 31.172.31.251 [300350.696557] PGD 1a0d067 
May 19 09:07:45 31.172.31.251  
May 19 09:07:45 31.172.31.251 [300350.696587] Oops: 0000 [#1] 
May 19 09:07:45 31.172.31.251  
May 19 09:07:45 31.172.31.251 [300350.696605] Modules linked in:
May 19 09:07:45 31.172.31.251  xt_policy(E)
May 19 09:07:45 31.172.31.251  authenc(E)
May 19 09:07:45 31.172.31.251  echainiv(E)
May 19 09:07:45 31.172.31.251  xfrm6_mode_tunnel(E)
May 19 09:07:45 31.172.31.251  xfrm4_mode_tunnel(E)
May 19 09:07:45 31.172.31.251  xt_physdev(E)
May 19 09:07:45 31.172.31.251  br_netfilter(E)
May 19 09:07:45 31.172.31.251  xen_netback(E)
May 19 09:07:45 31.172.31.251  tun(E)
May 19 09:07:45 31.172.31.251  xen_blkback(E)
May 19 09:07:45 31.172.31.251  xt_multiport(E)
May 19 09:07:45 31.172.31.251  xen_gntdev(E)
May 19 09:07:45 31.172.31.251  xen_evtchn(E)
May 19 09:07:45 31.172.31.251  xenfs(E)
May 19 09:07:45 31.172.31.251  xfrm_user(E)
May 19 09:07:45 31.172.31.251  xen_privcmd(E)
May 19 09:07:45 31.172.31.251  xfrm4_tunnel(E)
May 19 09:07:45 31.172.31.251  tunnel4(E)
May 19 09:07:45 31.172.31.251  ipcomp(E)
May 19 09:07:45 31.172.31.251  xfrm_ipcomp(E)
May 19 09:07:45 31.172.31.251  esp4(E)
May 19 09:07:45 31.172.31.251  ah4(E)
May 19 09:07:45 31.172.31.251  af_key(E)
May 19 09:07:45 31.172.31.251  xfrm_algo(E)
May 19 09:07:45 31.172.31.251  ipmi_poweroff(E)
May 19 09:07:45 31.172.31.251  video(E)
May 19 09:07:45 31.172.31.251  thermal(E)
May 19 09:07:45 31.172.31.251  fan(E)
May 19 09:07:45 31.172.31.251  ac(E)
May 19 09:07:45 31.172.31.251  battery(E)
May 19 09:07:45 31.172.31.251  ip6t_REJECT(E)
May 19 09:07:45 31.172.31.251  nf_reject_ipv6(E)
May 19 09:07:45 31.172.31.251  ip6table_filter(E)
May 19 09:07:45 31.172.31.251  ip6_tables(E)
May 19 09:07:45 31.172.31.251  bridge(E)
May 19 09:07:45 31.172.31.251  stp(E)
May 19 09:07:45 31.172.31.251  llc(E)
May 19 09:07:45 31.172.31.251  ipt_REJECT(E)
May 19 09:07:45 31.172.31.251  nf_reject_ipv4(E)
May 19 09:07:45 31.172.31.251  xt_tcpudp(E)
May 19 09:07:45 31.172.31.251  iptable_filter(E)
May 19 09:07:45 31.172.31.251  ip_tables(E)
May 19 09:07:45 31.172.31.251  x_tables(E)
May 19 09:07:45 31.172.31.251  ext4(E)
May 19 09:07:45 31.172.31.251  crc16(E)
May 19 09:07:45 31.172.31.251  mbcache(E)
May 19 09:07:45 31.172.31.251  jbd2(E)
May 19 09:07:45 31.172.31.251  crc32c_generic(E)
May 19 09:07:45 31.172.31.251  ipmi_devintf(E)
May 19 09:07:45 31.172.31.251  ipmi_watchdog(E)
May 19 09:07:45 31.172.31.251  w83627ehf(E)
May 19 09:07:45 31.172.31.251  hwmon_vid(E)
May 19 09:07:45 31.172.31.251  nf_conntrack_ipv4(E)
May 19 09:07:45 31.172.31.251  nf_defrag_ipv4(E)
May 19 09:07:45 31.172.31.251  nf_conntrack(E)
May 19 09:07:45 31.172.31.251  loop(E)
May 19 09:07:45 31.172.31.251  fuse(E)
May 19 09:07:45 31.172.31.251  x86_pkg_temp_thermal(E)
May 19 09:07:45 31.172.31.251  intel_powerclamp(E)
May 19 09:07:45 31.172.31.251  coretemp(E)
May 19 09:07:45 31.172.31.251  crct10dif_pclmul(E)
May 19 09:07:45 31.172.31.251  crc32_pclmul(E)
May 19 09:07:45 31.172.31.251  ghash_clmulni_intel(E)
May 19 09:07:45 31.172.31.251  hmac(E)
May 19 09:07:45 31.172.31.251  drbg(E)
May 19 09:07:45 31.172.31.251  ansi_cprng(E)
May 19 09:07:45 31.172.31.251  mgag200(E)
May 19 09:07:45 31.172.31.251  ttm(E)
May 19 09:07:45 31.172.31.251  joydev(E)
May 19 09:07:45 31.172.31.251  evdev(E)
May 19 09:07:45 31.172.31.251  pcspkr(E)
May 19 09:07:45 31.172.31.251  drm_kms_helper(E)
May 19 09:07:45 31.172.31.251  drm(E)
May 19 09:07:45 31.172.31.251  aesni_intel(E)
May 19 09:07:45 31.172.31.251  aes_x86_64(E)
May 19 09:07:45 31.172.31.251  lrw(E)
May 19 09:07:45 31.172.31.251  gf128mul(E)
May 19 09:07:45 31.172.31.251  glue_helper(E)
May 19 09:07:45 31.172.31.251  ablk_helper(E)
May 19 09:07:45 31.172.31.251  cryptd(E)
May 19 09:07:45 31.172.31.251  iTCO_wdt(E)
May 19 09:07:45 31.172.31.251  iTCO_vendor_support(E)
May 19 09:07:45 31.172.31.251  sb_edac(E)
May 19 09:07:45 31.172.31.251  edac_core(E)
May 19 09:07:45 31.172.31.251  8250_fintek(E)
May 19 09:07:45 31.172.31.251  i2c_i801(E)
May 19 09:07:45 31.172.31.251  wmi(E)
May 19 09:07:45 31.172.31.251  ipmi_si(E)
May 19 09:07:45 31.172.31.251  ipmi_msghandler(E)
May 19 09:07:45 31.172.31.251  tpm_tis(E)
May 19 09:07:45 31.172.31.251  tpm(E)
May 19 09:07:45 31.172.31.251  mei_me(E)
May 19 09:07:45 31.172.31.251  shpchp(E)
May 19 09:07:45 31.172.31.251  mei(E)
May 19 09:07:45 31.172.31.251  lpc_ich(E)
May 19 09:07:45 31.172.31.251  mfd_core(E)
May 19 09:07:45 31.172.31.251  ioatdma(E)
May 19 09:07:45 31.172.31.251  processor(E)
May 19 09:07:45 31.172.31.251  button(E)
May 19 09:07:45 31.172.31.251  xfs(E)
May 19 09:07:45 31.172.31.251  libcrc32c(E)
May 19 09:07:45 31.172.31.251  dm_mod(E)
May 19 09:07:45 31.172.31.251  raid10(E)
May 19 09:07:45 31.172.31.251  raid1(E)
May 19 09:07:45 31.172.31.251  md_mod(E)
May 19 09:07:45 31.172.31.251  uas(E)
May 19 09:07:45 31.172.31.251  usb_storage(E)
May 19 09:07:45 31.172.31.251  hid_generic(E)
May 19 09:07:45 31.172.31.251  usbhid(E)
May 19 09:07:45 31.172.31.251  hid(E)
May 19 09:07:45 31.172.31.251  netconsole(E)
May 19 09:07:45 31.172.31.251  configfs(E)
May 19 09:07:45 31.172.31.251  sg(E)
May 19 09:07:45 31.172.31.251  sd_mod(E)
May 19 09:07:45 31.172.31.251  ahci(E)
May 19 09:07:45 31.172.31.251  libahci(E)
May 19 09:07:45 31.172.31.251  ehci_pci(E)
May 19 09:07:45 31.172.31.251  ehci_hcd(E)
May 19 09:07:45 31.172.31.251  libata(E)
May 19 09:07:45 31.172.31.251  igb(E)
May 19 09:07:45 31.172.31.251  crc32c_intel(E)
May 19 09:07:45 31.172.31.251  i2c_algo_bit(E)
May 19 09:07:45 31.172.31.251  dca(E)
May 19 09:07:45 31.172.31.251  usbcore(E)
May 19 09:07:45 31.172.31.251  ptp(E)
May 19 09:07:45 31.172.31.251  scsi_mod(E)
May 19 09:07:45 31.172.31.251  usb_common(E)
May 19 09:07:45 31.172.31.251  pps_core(E)
May 19 09:07:45 31.172.31.251  fjes(E)
May 19 09:07:45 31.172.31.251  
May 19 09:07:45 31.172.31.251 [300350.697321] CPU: 0 PID: 0 Comm: swapper/0 
Tainted: G        W   E   4.5.0-0.bpo.1-amd64 #1 Debian 4.5.1-1~bpo8+1
May 19 09:07:45 31.172.31.251 [300350.697355] Hardware name: Supermicro 
X9SRE/X9SRE-3F/X9SRi/X9SRi-3F/X9SRE/X9SRE-3F/X9SRi/X9SRi-3F, BIOS 3.0a 
01/03/2014
May 19 09:07:45 31.172.31.251 [300350.697390] task: ffffffff81a13540 ti: 
ffffffff81a00000 task.ti: ffffffff81a00000
May 19 09:07:45 31.172.31.251 [300350.697415] RIP: e030:[<ffffffff8157d64c>] 
May 19 09:07:45 31.172.31.251  [<ffffffff8157d64c>] 
ndisc_send_redirect+0x44c/0x4d0
May 19 09:07:45 31.172.31.251 [300350.697449] RSP: e02b:ffff880281e03730  
EFLAGS: 00010212
May 19 09:07:45 31.172.31.251 [300350.697467] RAX: ffff880278fdf868 RBX: 
ffff880277e8c100 RCX: ffff880278fdf870
May 19 09:07:45 31.172.31.251 [300350.697490] RDX: 00000000000004a0 RSI: 
ffff880279ba3c4e RDI: 40067c0800000061
May 19 09:07:45 31.172.31.251 [300350.697513] RBP: ffff880281e03820 R08: 
00000000000006c0 R09: 9601294600a7012a
May 19 09:07:45 31.172.31.251 [300350.697536] R10: 0100000000000000 R11: 
00000000c27933da R12: ffff880277b3e900
May 19 09:07:45 31.172.31.251 [300350.697559] R13: ffff880002cce6c0 R14: 
00000000000004a8 R15: ffff880279ba3c66
May 19 09:07:45 31.172.31.251 [300350.697588] FS:  0000000000000000(0000) 
GS:ffff880281e00000(0000) knlGS:ffff880281e00000
May 19 09:07:45 31.172.31.251 [300350.697615] CS:  e033 DS: 0000 ES: 0000 CR0: 
0000000080050033
May 19 09:07:45 31.172.31.251 [300350.697636] CR2: ffff880279ba40e6 CR3: 
000000007d61e000 CR4: 0000000000042660
May 19 09:07:45 31.172.31.251 [300350.697660] Stack:
May 19 09:07:45 31.172.31.251 [300350.697668]  000000000000000a
May 19 09:07:45 31.172.31.251  ffff880002cc7000
May 19 09:07:45 31.172.31.251  ffffffff00000000
May 19 09:07:45 31.172.31.251  ffff880281e037c8
May 19 09:07:45 31.172.31.251  
May 19 09:07:45 31.172.31.251 [300350.697699]  00000000000080fe
May 19 09:07:45 31.172.31.251  1ad902feff7ac40e
May 19 09:07:45 31.172.31.251  9401294600a7012a
May 19 09:07:45 31.172.31.251  0100000000000000
May 19 09:07:45 31.172.31.251  
May 19 09:07:45 31.172.31.251 [300350.697732]  ffff88027960000a
May 19 09:07:45 31.172.31.251  ffff880279ac6680
May 19 09:07:45 31.172.31.251  0000000100000004
May 19 09:07:45 31.172.31.251  003a000000000000
May 19 09:07:45 31.172.31.251  
May 19 09:07:45 31.172.31.251 [300350.697764] Call Trace:
May 19 09:07:45 31.172.31.251 [300350.697778]  <IRQ> 
May 19 09:07:45 31.172.31.251  
May 19 09:07:45 31.172.31.251 [300350.697792]  [<ffffffff81564660>] ? 
ip6_forward+0x8d0/0x8e0
May 19 09:07:45 31.172.31.251 [300350.697814]  [<ffffffff815745cd>] ? 
ip6_route_input+0xfd/0x150
May 19 09:07:45 31.172.31.251 [300350.697835]  [<ffffffff8156622e>] ? 
ipv6_rcv+0x31e/0x4f0
May 19 09:07:45 31.172.31.251 [300350.698841]  [<ffffffff81565a70>] ? 
ip6_make_skb+0x1e0/0x1e0
May 19 09:07:45 31.172.31.251 [300350.699848]  [<ffffffff814bc679>] ? 
__netif_receive_skb_core+0x2b9/0xa00
May 19 09:07:45 31.172.31.251 [300350.700867]  [<ffffffffc06e8460>] ? 
br_validate_ipv4.isra.23+0x1c0/0x1c0 [br_netfilter]
May 19 09:07:45 31.172.31.251 [300350.701884]  [<ffffffff814bce4f>] ? 
netif_receive_skb_internal+0x2f/0xa0
May 19 09:07:45 31.172.31.251 [300350.702897]  [<ffffffffc05bc3a8>] ? 
br_handle_frame_finish+0x1d8/0x5d0 [bridge]
May 19 09:07:45 31.172.31.251 [300350.703960]  [<ffffffffc05bb08a>] ? 
__br_forward+0x10a/0x150 [bridge]
May 19 09:07:45 31.172.31.251 [300350.704989]  [<ffffffffc05bc120>] ? 
br_port_flags_change+0x20/0x20 [bridge]
May 19 09:07:45 31.172.31.251 [300350.705989]  [<ffffffffc06ea0c6>] ? 
br_nf_pre_routing_finish_ipv6+0x106/0x2a0 [br_netfilter]
May 19 09:07:45 31.172.31.251 [300350.706984]  [<ffffffffc05bc1d0>] ? 
br_handle_local_finish+0xa0/0xa0 [bridge]
May 19 09:07:45 31.172.31.251 [300350.707968]  [<ffffffffc06ea682>] ? 
br_nf_pre_routing_ipv6+0xf2/0x15f [br_netfilter]
May 19 09:07:45 31.172.31.251 [300350.708940]  [<ffffffffc06e9fc0>] ? 
br_nf_pre_routing+0x470/0x470 [br_netfilter]
May 19 09:07:45 31.172.31.251 [300350.709907]  [<ffffffffc06e9df7>] ? 
br_nf_pre_routing+0x2a7/0x470 [br_netfilter]
May 19 09:07:45 31.172.31.251 [300350.710870]  [<ffffffff814a8886>] ? 
__alloc_skb+0x96/0x1e0
May 19 09:07:45 31.172.31.251 [300350.711809]  [<ffffffff814f34c4>] ? 
nf_iterate+0x54/0x70
May 19 09:07:45 31.172.31.251 [300350.712724]  [<ffffffff814f354d>] ? 
nf_hook_slow+0x6d/0xc0
May 19 09:07:45 31.172.31.251 [300350.713618]  [<ffffffffc05bc974>] ? 
br_handle_frame+0x1d4/0x2c0 [bridge]
May 19 09:07:45 31.172.31.251 [300350.714496]  [<ffffffffc05bc1d0>] ? 
br_handle_local_finish+0xa0/0xa0 [bridge]
May 19 09:07:45 31.172.31.251 [300350.715386]  [<ffffffff814bc706>] ? 
__netif_receive_skb_core+0x346/0xa00
May 19 09:07:45 31.172.31.251 [300350.716358]  [<ffffffff8100dee4>] ? 
set_phys_to_machine+0x14/0x40
May 19 09:07:45 31.172.31.251 [300350.717178]  [<ffffffff814bce4f>] ? 
netif_receive_skb_internal+0x2f/0xa0
May 19 09:07:45 31.172.31.251 [300350.718033]  [<ffffffffc0751a3d>] ? 
xenvif_tx_action+0x6cd/0x890 [xen_netback]
May 19 09:07:45 31.172.31.251 [300350.718873]  [<ffffffff811cbf6d>] ? 
kmem_cache_free+0xdd/0x3f0
May 19 09:07:45 31.172.31.251 [300350.719642]  [<ffffffffc01aa5b5>] ? 
igb_poll+0x865/0xe80 [igb]
May 19 09:07:45 31.172.31.251 [300350.720392]  [<ffffffffc07545f8>] ? 
xenvif_poll+0x28/0x70 [xen_netback]
May 19 09:07:45 31.172.31.251 [300350.721143]  [<ffffffff814bd5e3>] ? 
net_rx_action+0x233/0x370
May 19 09:07:45 31.172.31.251 [300350.721852]  [<ffffffff8107e316>] ? 
__do_softirq+0x106/0x2a0
May 19 09:07:45 31.172.31.251 [300350.722534]  [<ffffffff8107e5e6>] ? 
irq_exit+0x86/0x90
May 19 09:07:45 31.172.31.251 [300350.723224]  [<ffffffff813d1bc1>] ? 
xen_evtchn_do_upcall+0x31/0x40
May 19 09:07:45 31.172.31.251 [300350.723875]  [<ffffffff815bb56e>] ? 
xen_do_hypervisor_callback+0x1e/0x40
May 19 09:07:45 31.172.31.251 [300350.724512]  <EOI> 
May 19 09:07:45 31.172.31.251  
May 19 09:07:45 31.172.31.251 [300350.724525]  [<ffffffff810013aa>] ? 
xen_hypercall_sched_op+0xa/0x20
May 19 09:07:45 31.172.31.251 [300350.725798]  [<ffffffff810013aa>] ? 
xen_hypercall_sched_op+0xa/0x20
May 19 09:07:45 31.172.31.251 [300350.726478]  [<ffffffff8100c0cc>] ? 
xen_safe_halt+0xc/0x20
May 19 09:07:45 31.172.31.251 [300350.727117]  [<ffffffff81020a28>] ? 
default_idle+0x18/0xc0
May 19 09:07:45 31.172.31.251 [300350.727741]  [<ffffffff810b9ba2>] ? 
cpu_startup_entry+0x322/0x380
May 19 09:07:45 31.172.31.251 [300350.728352]  [<ffffffff81b3efa8>] ? 
start_kernel+0x49c/0x4bc
May 19 09:07:45 31.172.31.251 [300350.728950]  [<ffffffff81b412ee>] ? 
xen_start_kernel+0x522/0x52c
May 19 09:07:45 31.172.31.251 [300350.729543] Code: 
May 19 09:07:45 31.172.31.251  
May 19 09:07:45 31.172.31.251  
May 19 09:07:45 31.172.31.251 [300350.730993] RIP 
May 19 09:07:45 31.172.31.251  [<ffffffff8157d64c>] 
ndisc_send_redirect+0x44c/0x4d0
May 19 09:07:45 31.172.31.251 [300350.731613]  RSP <ffff880281e03730>
May 19 09:07:45 31.172.31.251 [300350.732221] CR2: ffff880279ba40e6
May 19 09:07:45 31.172.31.251 [300350.735923] ---[ end trace 2a742fd1864e2321 
]---
May 19 09:07:45 31.172.31.251 [300350.739552] Kernel panic - not syncing: Fatal 
exception in interrupt
May 19 09:07:45 31.172.31.251 [300350.747574] Kernel Offset: disabled

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