2.6.32-042stab112.15: kernel BUG at kernel/workqueue.c:192

Kernel crashed while doing "yum install telnet" in a newly created container. HN only has one container running.

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# rpm -qi vzkernel-2.6.32-042stab112.15.x86_64
Name : vzkernel Relocations: (not relocatable)
Version : 2.6.32 Vendor: Parallels, Inc.
Release : 042stab112.15 Build Date: Tue 20 Oct 2015 02:06:57 PM UTC
Install Date: Thu 05 Nov 2015 07:57:14 AM UTC Build Host: kbuild-rh6-x64.eng.sw.ru
Group : System Environment/Kernel Source RPM: vzkernel-2.6.32-042stab112.15.src.rpm
Size : 135242626 License: GPLv2
Signature : DSA/SHA1, Sat 24 Oct 2015 03:16:49 PM UTC, Key ID 92a60da6a7a1d4b6
URL : http://www.kernel.org/
Summary : The Linux kernel
Description :
The kernel package contains the Linux kernel (vmlinuz), the core of any
Linux operating system. The kernel handles the basic functions
of the operating system: memory allocation, process allocation, device
input and output, etc.

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<4>[ 1028.684049] ------------[ cut here ]------------
<4>[ 1028.684062] WARNING: at kernel/pid.c:319 free_pid+0x1ee/0x210() (Not tainted)
<4>[ 1028.684066] Hardware name: PowerEdge R720
<4>[ 1028.684068] Modules linked in: ipt_LOG vzethdev pio_kaio pio_nfs pio_direct pfmt_raw pfmt_ploop1 ploop simfs vzrst nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 vzcpt nfs lockd fscache auth_rpcgss nfs_acl sunrpc nf_conntrack vziolimit vzdquota ip6t_REJECT ip6table_mangle xt_length xt_hl xt_tcpmss xt_TCPMSS iptable_mangle xt_multiport xt_limit xt_dscp ipt_REJECT vzevent vznetdev vzmon vzdev bridge stp llc iptable_filter ip_tables ip6table_filter ip6_tables ipv6 ipmi_devintf sg joydev power_meter acpi_ipmi ipmi_si ipmi_msghandler microcode iTCO_wdt iTCO_vendor_support tg3 ptp pps_core dcdbas sb_edac edac_core lpc_ich mfd_core shpchp ext4 jbd2 mbcache sd_mod crc_t10dif sr_mod cdrom megaraid_sas wmi ahci dm_mirror dm_region_hash dm_log dm_mod [last unloaded: speedstep_lib]
<4>[ 1028.684162] Pid: 3628, comm: urlgrabber-ext- veid: 234 Not tainted 2.6.32-042stab112.15 #1
<4>[ 1028.684167] Call Trace:
<4>[ 1028.684178] [<ffffffff8107ded1>] ? warn_slowpath_common+0x91/0xe0
<4>[ 1028.684185] [<ffffffff8107df3a>] ? warn_slowpath_null+0x1a/0x20
<4>[ 1028.684191] [<ffffffff810a51ce>] ? free_pid+0x1ee/0x210
<4>[ 1028.684196] [<ffffffff810a5345>] ? detach_pid+0x75/0x80
<4>[ 1028.684202] [<ffffffff810821b8>] ? release_task+0x228/0x560
<4>[ 1028.684208] [<ffffffff81083c06>] ? do_exit+0x686/0x9e0
<4>[ 1028.684214] [<ffffffff81084067>] ? sys_exit+0x17/0x20
<4>[ 1028.684220] [<ffffffff8100b1a2>] ? system_call_fastpath+0x16/0x1b
<4>[ 1028.684224] ---[ end trace 427e4e42b2b627f3 ]---
<4>[ 1028.684227] Tainting kernel with flag 0x9
<4>[ 1028.684231] Pid: 3628, comm: urlgrabber-ext- veid: 234 Not tainted 2.6.32-042stab112.15 #1
<4>[ 1028.684235] Call Trace:
<4>[ 1028.684241] [<ffffffff8107dd31>] ? add_taint+0x71/0x80
<4>[ 1028.684247] [<ffffffff8107dede>] ? warn_slowpath_common+0x9e/0xe0
<4>[ 1028.684254] [<ffffffff8107df3a>] ? warn_slowpath_null+0x1a/0x20
<4>[ 1028.684259] [<ffffffff810a51ce>] ? free_pid+0x1ee/0x210
<4>[ 1028.684265] [<ffffffff810a5345>] ? detach_pid+0x75/0x80
<4>[ 1028.684270] [<ffffffff810821b8>] ? release_task+0x228/0x560
<4>[ 1028.684275] [<ffffffff81083c06>] ? do_exit+0x686/0x9e0
<4>[ 1028.684281] [<ffffffff81084067>] ? sys_exit+0x17/0x20
<4>[ 1028.684286] [<ffffffff8100b1a2>] ? system_call_fastpath+0x16/0x1b
<4>[ 1028.684298] ------------[ cut here ]------------
<2>[ 1028.684317] kernel BUG at kernel/workqueue.c:192!
<4>[ 1028.684334] invalid opcode: 0000 [#1] SMP
<4>[ 1028.684361] last sysfs file: /sys/devices/system/cpu/online
<4>[ 1028.684380] CPU 11
<4>[ 1028.684390] Modules linked in: ipt_LOG vzethdev pio_kaio pio_nfs pio_direct pfmt_raw pfmt_ploop1 ploop simfs vzrst nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 vzcpt nfs lockd fscache auth_rpcgss nfs_acl sunrpc nf_conntrack vziolimit vzdquota ip6t_REJECT ip6table_mangle xt_length xt_hl xt_tcpmss xt_TCPMSS iptable_mangle xt_multiport xt_limit xt_dscp ipt_REJECT vzevent vznetdev vzmon vzdev bridge stp llc iptable_filter ip_tables ip6table_filter ip6_tables ipv6 ipmi_devintf sg joydev power_meter acpi_ipmi ipmi_si ipmi_msghandler microcode iTCO_wdt iTCO_vendor_support tg3 ptp pps_core dcdbas sb_edac edac_core lpc_ich mfd_core shpchp ext4 jbd2 mbcache sd_mod crc_t10dif sr_mod cdrom megaraid_sas wmi ahci dm_mirror dm_region_hash dm_log dm_mod [last unloaded: speedstep_lib]
<4>[ 1028.685006]
<4>[ 1028.685017] Pid: 3628, comm: urlgrabber-ext- veid: 234 Tainted: G W -- ------------ 2.6.32-042stab112.15 #1 042stab112_15 Dell Inc. PowerEdge R720/0VWT90
<4>[ 1028.685074] RIP: 0010:[<ffffffff810a39f9>] [<ffffffff810a39f9>] queue_work_on+0x49/0x60
<4>[ 1028.685352] RSP: 0018:ffff88042c2abe38 EFLAGS: 00010003
<4>[ 1028.685616] RAX: ffffffff81ab4fe0 RBX: ffff88042bed00c0 RCX: 0000000000000000
<4>[ 1028.685884] RDX: ffffffff81ab4fd8 RSI: ffff88042dea7300 RDI: 000000000000000b
<4>[ 1028.686154] RBP: ffff88042c2abe38 R08: 00000000003418a0 R09: 0000000000000000
<4>[ 1028.686424] R10: 0000000000000005 R11: 00000000000000c8 R12: 0000000000000001
<4>[ 1028.686691] R13: 0000000000000046 R14: ffffffff81ab4780 R15: ffff8804277f48c0
<4>[ 1028.686962] FS: 0000000000000000(0000) GS:ffff88003a0c0000(0000) knlGS:0000000000000000
<4>[ 1028.687477] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[ 1028.687742] CR2: 00007f5565f651a0 CR3: 0000000418707000 CR4: 00000000000407e0
<4>[ 1028.688013] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4>[ 1028.688283] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
<4>[ 1028.688554] Process urlgrabber-ext- (pid: 3628, veid: 234, threadinfo ffff88042c2a8000, task ffff880425760580)
<4>[ 1028.689075] Stack:
<4>[ 1028.689329] ffff88042c2abe48 ffffffff810a3a4f ffff88042c2abe58 ffffffff810a3a78
<4>[ 1028.689612] <d> ffff88042c2abe88 ffffffff810a50c7 ffff880425760580 0000000000010898
<4>[ 1028.690148] <d> ffff8804263eb640 0000000000000000 ffff88042c2abe98 ffffffff810a5345
<4>[ 1028.690936] Call Trace:
<4>[ 1028.691194] [<ffffffff810a3a4f>] queue_work+0x1f/0x30
<4>[ 1028.691458] [<ffffffff810a3a78>] schedule_work+0x18/0x20
<4>[ 1028.691724] [<ffffffff810a50c7>] free_pid+0xe7/0x210
<4>[ 1028.691990] [<ffffffff810a5345>] detach_pid+0x75/0x80
<4>[ 1028.692256] [<ffffffff810821b8>] release_task+0x228/0x560
<4>[ 1028.692523] [<ffffffff81083c06>] do_exit+0x686/0x9e0
<4>[ 1028.692790] [<ffffffff81084067>] sys_exit+0x17/0x20
<4>[ 1028.693054] [<ffffffff8100b1a2>] system_call_fastpath+0x16/0x1b
<4>[ 1028.693321] Code: 75 29 44 8b 46 20 45 85 c0 75 24 48 63 ff 48 8b 06 48 89 d6 48 03 04 fd e0 43 c1 81 48 89 c7 e8 1e ff ff ff b8 01 00 00 00 c9 c3 <0f> 0b eb fe 8b 3d fd a7 b7 00 eb d4 66 66 2e 0f 1f 84 00 00 00
<1>[ 1028.694469] RIP [<ffffffff810a39f9>] queue_work_on+0x49/0x60
<4>[ 1028.694743] RSP <ffff88042c2abe38>