Article ID: 120074, created on Feb 11, 2014, last review on Jun 17, 2016

  • Applies to:
  • Virtuozzo
  • Virtuozzo containers for Linux
  • Virtuozzo hypervisor

Symptoms

The node crashes with the following stack:

<6>[2639227.134856] CT: 7007: started
<1>[2639227.502793] BUG: unable to handle kernel NULL pointer dereference at (null)
<1>[2639227.517143] IP: [<ffffffffa027ab6b>] ipv6_add_dev+0xab/0x3d0 [ipv6]
<4>[2639227.530105] PGD 101f86067 PUD 6e1aa9067 PMD 0
<4>[2639227.539429] Oops: 0000 [#1] SMP
<4>[2639227.546303] last sysfs file: /sys/module/vzcptpram/initstate
<4>[2639227.558011] CPU 6
<4>[2639227.562028] Modules linked in: autofs4 vzcptpram(U) snapapi26(P)(U) dell_rbu cls_fw sch_cbq ip_vzredir(U) vzredir(U) vzcompat(U) vzrst vznetdev ip6_vzprivnet(U) ip6_vzredir(U) ip6_vznetstat(U) ip_vzprivnet(U) vziolimit vzsnap(U) vzfs(U) vzdquota vzcpt nfs lockd fscache auth_rpcgss nfs_acl sunrpc vzlinkdev(U) vzethdev vzevent vzlist(U) vzstat(U) vzmon ip_vznetstat(U) vznetstat(U) vzdev nf_nat_ftp xt_DSCP mpt2sas scsi_transport_sas raid_class mptctl mptbase ipv6 xt_mark xt_connlimit ipt_MASQUERADE xt_length xt_hl xt_tcpmss xt_TCPMSS iptable_nat iptable_mangle xt_dscp xt_recent xt_owner nf_conntrack_ftp xt_conntrack ipt_REDIRECT nf_nat ipt_REJECT xt_multiport ipt_LOG xt_limit nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack iptable_filter ip_tables ipmi_devintf xt_MARK arc4 ecb ppp_mppe ip_gre ppp_async crc_ccitt ppp_deflate zlib_deflate ppp_generic slhc fuse tun power_meter ses enclosure sg bnx2 dcdbas microcode serio_raw iTCO_wdt iTCO_vendor_support i7core_edac edac_core ext4 jbd2 mbcache sr_mod cdrom sd_mod crc_t10dif pata_acpi ata_generic ata_piix megaraid_sas wmi dm_mirror dm_region_hash dm_log dm_mod [last unloaded: edd]
<4>[2639227.765708]
<4>[2639227.769080] Pid: 59913, comm: init veid: 7007 Tainted: P         C ---------------    2.6.32-042stab084.14 #1 042stab084_14 Dell Inc. PowerEdge R410/01V648
<4>[2639227.797406] RIP: 0010:[<ffffffffa027ab6b>]  [<ffffffffa027ab6b>] ipv6_add_dev+0xab/0x3d0 [ipv6]
<4>[2639227.815292] RSP: 0018:ffff88001e30bbb0  EFLAGS: 00010286
<4>[2639227.826310] RAX: 0000000000000000 RBX: ffff880a73dcb800 RCX: 0000000000000000
<4>[2639227.841032] RDX: ffff880a73dcb960 RSI: ffffffffa02b1a20 RDI: ffff88020e5ed020
<4>[2639227.855753] RBP: ffff88001e30bbd0 R08: 0000000000000000 R09: ffff880a73dcb800
<4>[2639227.870469] R10: ffff88001e30bfd8 R11: 00000000afacfb41 R12: ffff88020e5ed020
<4>[2639227.885190] R13: ffff88001e30bd08 R14: ffff88020e5ed020 R15: ffff88082b5df2c0
<4>[2639227.899911] FS:  00007f681718db20(0000) GS:ffff8808506c0000(0000) knlGS:0000000000000000
<4>[2639227.916538] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
<4>[2639227.928424] CR2: 0000000000000000 CR3: 0000000822a2d000 CR4: 00000000000007e0
<4>[2639227.943143] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4>[2639227.957864] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
<4>[2639227.972584] Process init (pid: 59913, veid: 7007, threadinfo ffff88001e30a000, task ffff8800879483c0)
<4>[2639227.991468] Stack:
<4>[2639227.995886]  ffff88020e5ed020 0000000000000000 ffff88001e30bd08 ffff88020e5ed020
<4>[2639228.010772] <d> ffff88001e30bbf0 ffffffffa027aee5 ffff88020e5ed020 00000000ffffffff
<4>[2639228.026620] <d> ffff88001e30bc30 ffffffffa027af43 ffff88001e30bc10 00000000003114c0
<4>[2639228.042879] Call Trace:
<4>[2639228.048188]  [<ffffffffa027aee5>] ipv6_find_idev+0x55/0x80 [ipv6]
<4>[2639228.060789]  [<ffffffffa027af43>] addrconf_add_dev+0x33/0xc0 [ipv6]
<4>[2639228.073745]  [<ffffffffa027fb44>] inet6_addr_add+0x94/0x1d0 [ipv6]
<4>[2639228.086519]  [<ffffffffa04cbd1a>] ? _rst_get_object+0xfa/0x3e0 [vzrst]
<4>[2639228.099984]  [<ffffffffa04e1423>] rst_restore_ifaddr+0x153/0x440 [vzrst]
<4>[2639228.113792]  [<ffffffffa04e1788>] rst_restore_net+0x78/0x800 [vzrst]
<4>[2639228.126909]  [<ffffffffa04d4641>] ? restore_one_namespace+0x41/0x80 [vzrst]
<4>[2639228.141249]  [<ffffffffa04d475d>] ? rst_root_namespace+0xdd/0x150 [vzrst]
<4>[2639228.155245]  [<ffffffffa04ca973>] hook+0x10d3/0x1a60 [vzrst]
<4>[2639228.166975]  [<ffffffff81065d0a>] ? finish_task_switch+0xda/0xe0
<4>[2639228.179405]  [<ffffffffa04c98a0>] ? hook+0x0/0x1a60 [vzrst]
<4>[2639228.190964]  [<ffffffffa04c78bf>] child_rip+0xa/0x1b [vzrst]
<4>[2639228.203846]  [<ffffffffa04c98a0>] ? hook+0x0/0x1a60 [vzrst]
<4>[2639228.215394]  [<ffffffffa04c98a0>] ? hook+0x0/0x1a60 [vzrst]
<4>[2639228.226941]  [<ffffffffa04c78b5>] ? child_rip+0x0/0x1b [vzrst]
<4>[2639228.238994] Code: 20 c7 80 e0 00 00 00 00 00 00 01 48 8d 90 60 01 00 00 49 8b 84 24 08 04 00 00 48 c7 c6 20 1a 2b a0 4c 89 e7 48 8b 80 a0 03 00 00 <48> 8b 08 48 89 8b 60 01 00 00 48 8b 48 08 48 89 4a 08 48 8b 48
<1>[2639228.278153] RIP  [<ffffffffa027ab6b>] ipv6_add_dev+0xab/0x3d0 [ipv6]
<4>[2639228.291291]  RSP <ffff88001e30bbb0>
<4>[2639228.298670] CR2: 0000000000000000

Cause

The problem is recognized as a product bug with internal ID PSBM-22795.

The node crashed while migrating a container from the node with IPv6 enabled.

Resolution

Follow this KB article to enable IPv6 support on destination node.

a26b38f94253cdfbf1028d72cf3a498b 2897d76d56d2010f4e3a28f864d69223 d02f9caf3e11b191a38179103495106f e8e50b42231236b82df27684e7ec0beb 0dd5b9380c7d4884d77587f3eb0fa8ef

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