Okay. On a different machine with different load, we've now got the same
problem:
KERNEL: /usr/lib/debug/boot/vmlinux-4.4.0-78-generic
DUMPFILE: dump.201705300948 [PARTIAL DUMP]
CPUS: 4
DATE: Tue May 30 09:48:05 2017
UPTIME: 01:47:38
LOAD AVERAGE: 0.05, 0.06, 0.04
TASKS: 292
NODENAME: ossoio-docker1-tcn
RELEASE: 4.4.0-78-generic
VERSION: #99-Ubuntu SMP Thu Apr 27 15:29:09 UTC 2017
MACHINE: x86_64 (2199 Mhz)
MEMORY: 4 GB
PANIC: "BUG: unable to handle kernel paging request at ffff88013a404000"
PID: 0
COMMAND: "swapper/3"
TASK: ffff88013abf1980 (1 of 4) [THREAD_INFO: ffff88013a400000]
CPU: 3
STATE: TASK_RUNNING (PANIC)
#9 [ffff88013a403e20] async_page_fault at ffffffff81842be8
#10 [ffff88013a403e38] tick_nohz_idle_exit at ffffffff810ff75e
#11 [ffff88013a403ed8] cpu_startup_entry at ffffffff810c4736
#12 [ffff88013a403f30] start_secondary at ffffffff810517c4
Differences:
- this machine does not use zfs, the other one does
- this machine runs docker instances, the other one mainly mysqld
- this machines has x2apic enabled according to dmesg (no idea what that is)
Similarities:
- both are KVM guests (same KVM cluster, different nodes)
- the two KVM nodes have the same hardware, same kernel and same KVM host
software
- 4 cpus, 2200MHz, flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx lm constant_tsc nopl
xtopology pni cx16 x2apic hypervisor lahf_lm
- 512MB swap
Modules loaded:
- both: 8250_fintek autofs4 drm drm_kms_helper fb_sys_fops floppy
i2c_piix4 input_leds mac_hid parport parport_pc pata_acpi ppdev psmouse
serio_raw shpchp syscopyarea sysfillrect sysimgblt ttm
- this: aufs bridge br_netfilter ip6table_filter ip6_tables
iptable_filter iptable_nat ip_tables ipt_MASQUERADE llc nf_conntrack
nf_conntrack_ipv4 nf_conntrack_netlink nf_defrag_ipv4 nf_nat nf_nat_ipv4
nf_nat_masquerade_ipv4 nfnetlink stp veth xfrm_algo xfrm_user x_tables
xt_addrtype xt_conntrack xt_nat xt_tcpudp
- other: spl(O) zavl(PO) zcommon(PO) zfs(PO) znvpair(PO) zunicode(PO)
We should be able to run this node on the vanilla kernel and see how that goes.
Will report back in a bit.
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https://bugs.launchpad.net/bugs/1691741
Title:
Execute NX-protected page - 4.4.0-78-generic - kernel panic
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