Article ID: 120394, created on Feb 28, 2014, last review on Jun 17, 2016

  • Applies to:
  • Virtuozzo 6.0

Symptoms

PCS node crashes with the following stack, while trying to resume container(s):

    <1>[8379750.882537] BUG: unable to handle kernel NULL pointer dereference at 0000000000000030
    <1>[8379750.882778] IP: [<ffffffffa059e327>] rst_rollback_sockets+0x47/0x70 [vzrst]
    <4>[8379750.882914] PGD 2b36491067 PUD 30167ba067 PMD 0
    <4>[8379750.883048] Oops: 0000 [#1] SMP
    <4>[8379750.883173] last sysfs file: /sys/module/vzcptpram/initstate
    <4>[8379750.883293] CPU 1
    <4>[8379750.883305] Modules linked in: ip_vzredir(U) vzcompat(U) vzrst nf_nat ip6_vzprivnet(U) ip6_vzredir(U) ip6_vznetstat(U) pio_kaio pio_nfs pio_direct pfmt_raw pfmt_ploop1 ploop ip_vzprivnet(U) vziolimit(U) vzlinkdev(U) vzethdev vzlist(U) vzstat(U) ip_vznetstat(U) nf_conntrack_ipv4 nf_defrag_ipv4 prl_usb_connect(U) prl_netbridge(U) prl_vtdhook(U) prl_hypervisor(P)(U) bluetooth rfkill snapapi26(P)(U) simfs cls_u32 sch_sfq sch_htb ip6table_filter ip6_tables vzcptpram(U) fuse vzredir(U) vznetdev vzsnap(U) vzfs(U) vzdquota vzcpt nfs lockd fscache auth_rpcgss nfs_acl sunrpc vzevent vzmon vznetstat(U) vzdev netconsole configfs ebt_among ebtable_filter ebtables bridge bonding 8021q garp stp llc ipv6 xt_conntrack xt_recent xt_state nf_conntrack ipt_LOG xt_dscp xt_limit xt_multiport xt_TCPMSS xt_tcpmss xt_hl xt_length ipt_REJECT iptable_filter iptable_mangle ip_tables power_meter dcdbas sb_edac edac_core iTCO_wdt iTCO_vendor_support shpchp sg tg3 ext4 jbd2 mbcache sd_mod crc_t10dif ahci wmi megaraid_sas dm_mirror dm_region_hash dm_log dm_mod [last unloaded: ip_vzprivnet]
    <4>[8379750.885739]
    <4>[8379750.885851] Pid: 758840, comm: init veid: 41892 Tainted: P           ---------------    2.6.32-042stab083.2 #1 042stab083_2 Dell Inc. PowerEdge R720/0C4Y3R
    <4>[8379750.886104] RIP: 0010:[<ffffffffa059e327>]  [<ffffffffa059e327>] rst_rollback_sockets+0x47/0x70 [vzrst]
    <4>[8379750.886341] RSP: 0018:ffff8824c74b5e70  EFLAGS: 00010246
    <4>[8379750.886461] RAX: ffff8859a0219180 RBX: ffff885ff42b58c0 RCX: 0000000000000001
    <4>[8379750.886681] RDX: 0000000000000001 RSI: ffffffffa05b4326 RDI: 0000000000000000
    <4>[8379750.888877] RBP: ffff8824c74b5e80 R08: 00000000ffffffea R09: 00000000fffffffc
    <4>[8379750.889098] R10: 0000000000000001 R11: 00000000000000a0 R12: ffff882f0fc48250
    <4>[8379750.889316] R13: ffff882f0fc48000 R14: 00000000ffffffea R15: 00000000000000d9
    <4>[8379750.889536] FS:  00007f36c72d7320(0000) GS:ffff8830f1000000(0000) knlGS:0000000000000000
    <4>[8379750.889758] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
    <4>[8379750.889878] CR2: 0000000000000030 CR3: 0000002a2a7a0000 CR4: 00000000000407e0
    <4>[8379750.890095] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    <4>[8379750.890312] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    <4>[8379750.890531] Process init (pid: 758840, veid: 41892, threadinfo ffff8824c74b4000, task ffff882f5f441270)
    <4>[8379750.890758] Stack:
    <4>[8379750.890867]  ffff882bf6b91cf8 ffff882867140000 ffff8824c74b5f40 ffffffffa058ec4f
    <4>[8379750.891007] <d> ffff883f513bd800 ffff8828ffffffea ffff885fec774c45 000000002aa67b08
    <4>[8379750.891252] <d> ffff885fec774d49 ffff885fec774c86 0000000000000000 ffff8824c74b5ee8
    <4>[8379750.891603] Call Trace:
    <4>[8379750.891717]  [<ffffffffa058ec4f>] hook+0x3af/0x1a10 [vzrst]
    <4>[8379750.891842]  [<ffffffff81065d0a>] ? finish_task_switch+0xda/0xe0
    <4>[8379750.891964]  [<ffffffffa058e8a0>] ? hook+0x0/0x1a10 [vzrst]
    <4>[8379750.892086]  [<ffffffffa058c8bf>] child_rip+0xa/0x1b [vzrst]
    <4>[8379750.892208]  [<ffffffffa058e8a0>] ? hook+0x0/0x1a10 [vzrst]
    <4>[8379750.892332]  [<ffffffffa058e8a0>] ? hook+0x0/0x1a10 [vzrst]
    <4>[8379750.892454]  [<ffffffffa058c8b5>] ? child_rip+0x0/0x1b [vzrst]
    <4>[8379750.892577] Code: e3 75 11 eb 3f 0f 1f 80 00 00 00 00 48 8b 1b 4c 39 e3 74 30 48 8b 43 40 48 85 c0 74 ef 66 83 78 18 01 75 e8 48 8b b8 e8 01 00 00 <48> 83 7f 30 00 75 da e8 1d 49 ea e0 48 8b 1b 4c 39 e3 75 d5 0f
    <1>[8379750.893322] RIP  [<ffffffffa059e327>] rst_rollback_sockets+0x47/0x70 [vzrst]
    <4>[8379750.893546]  RSP <ffff8824c74b5e70>
    <4>[8379750.893659] CR2: 0000000000000030

Resolution

The issue has been fixed in scope of PSBM-25115* since Parallels Cloud Server 6.0 Update 6 (6.0.6-1992).

Install all pending updates and reboot into the latest available vzkernel.

Search Words

__switch_to+0x1ac/0x320

crash on container resume

rst_rollback_sockets+0x47/0x70

rst_rollback_sockets

crash on resume

hook+0x3af/0x1a60

kernel panic

c62e8726973f80975db0531f1ed5c6a2 2897d76d56d2010f4e3a28f864d69223 0dd5b9380c7d4884d77587f3eb0fa8ef

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