intel_pstate_timer_func() [ inline s64 div_s64_rem() ] で divide by zero エラーが発生する

Issue

• intel_pstate_timer_func() 関数で除算エラーが発生するため、カーネルパニックが発生します。

[4067605.161646] divide error:0000 [#1] SMP 
[4067605.161694] Modules linked in: btrfs zlib_deflate raid6_pq xor msdos ext4 mbcache jbd2 binfmt_misc arc4 md4 nls_utf8 cifs dns_resolver tcp_lp bnep bluetooth rfkill fuse dm_service_time iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ftp ip6t_rpfilter ip6t_REJECT ipt_REJECT xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw iptable_filter ip_tables intel_powerclamp coretemp vfat fat kvm_intel iTCO_wdt iTCO_vendor_support ipmi_devintf sr_mod kvm crct10dif_pclmul
[4067605.162023]  crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel cdc_ether lrw usbnet cdrom mii gf128mul glue_helper ablk_helper cryptd lpc_ich mfd_core pcspkr sb_edac edac_core ipmi_si ipmi_msghandler ioatdma wmi shpchp acpi_pad nfsd auth_rpcgss nfs_acl lockd uinput dm_multipath sunrpc xfs libcrc32c usb_storage sd_mod crc_t10dif crct10dif_common ixgbe mgag200 syscopyarea sysfillrect sysimgblt mdio drm_kms_helper ttm igb drm ptp pps_core dca i2c_algo_bit megaraid_sas i2c_core dm_mirror dm_region_hash dm_log dm_mod
[4067605.162245] CPU:113 PID:0 Comm: swapper/113 Tainted:G        W   --------------   3.10.0-229.1.2.el7.x86_64 #1
[4067605.162283] Hardware name:IBM x3950 X6 -[3837AC2]-/00FN827, BIOS -[A8E112BUS-1.00]- 08/27/2014
[4067605.162316] task: ffff880fe8abe660 ti: ffff880fe8ae4000 task.ti: ffff880fe8ae4000
[4067605.162343] RIP:0010:[<ffffffff814a9279>]  [<ffffffff814a9279>] intel_pstate_timer_func+0x179/0x3d0
[4067605.162387] RSP:0018:ffff883fff4e3db8  EFLAGS:00010206
[4067605.162408] RAX:0000000027100000 RBX: ffff883fe6965100 RCX:0000000000000000
[4067605.162435] RDX:0000000000000000 RSI:0000000000000010 RDI:000000002e53632d
[4067605.162461] RBP: ffff883fff4e3e20 R08:000e6f69a5a125c0 R09: ffff883fe84ec001
[4067605.162486] R10:0000000000000002 R11:0000000000000005 R12:00000000000049f5
[4067605.162513] R13:0000000000271000 R14:00000000000049f5 R15: 0000000000000246
[4067605.162539] FS:0000000000000000(0000) GS:ffff883fff4e0000(0000) knlGS:0000000000000000
[4067605.162567] CS:0010 DS:0000 ES:0000 CR0:0000000080050033
[4067605.162590] CR2:00007f7668601000 CR3:000000000190a000 CR4:00000000001407e0
[4067605.162616] DR0:0000000000000000 DR1:0000000000000000 DR2:0000000000000000
[4067605.162642] DR3:0000000000000000 DR6:00000000ffff0ff0 DR7:0000000000000400
[4067605.162669] Stack:
[4067605.162680]  ffff883fff4e3e58 ffffffff81099dc1 0000000000000086 0000000000000071
[4067605.162729]  ffff883fff4f3680 0000000000000071 fbdc8a965e33afee ffffffff810b69dd
[4067605.162773]  ffff883fe84ec000 ffff883fe6965108 0000000000000100 ffffffff814a9100
[4067605.162817] Call Trace:
[4067605.162832]  <IRQ> 
[4067605.162847] 
[4067605.162867]  [<ffffffff81099dc1>] ? run_posix_cpu_timers+0x51/0x840
[4067605.162890]  [<ffffffff810b69dd>] ? trigger_load_balance+0x5d/0x200
[4067605.162917]  [<ffffffff814a9100>] ? pid_param_set+0x130/0x130
[4067605.162950]  [<ffffffff8107df56>] call_timer_fn+0x36/0x110
[4067605.162974]  [<ffffffff814a9100>] ? pid_param_set+0x130/0x130
[4067605.163000]  [<ffffffff8107fdcf>] run_timer_softirq+0x21f/0x320
[4067605.163028]  [<ffffffff81077b2f>] __do_softirq+0xef/0x280
[4067605.163057]  [<ffffffff816156dc>] call_softirq+0x1c/0x30
[4067605.163088]  [<ffffffff81015d95>] do_softirq+0x65/0xa0
[4067605.163111]  [<ffffffff81077ec5>] irq_exit+0x115/0x120
[4067605.163135]  [<ffffffff81616355>] smp_apic_timer_interrupt+0x45/0x60
[4067605.163163]  [<ffffffff81614a1d>] apic_timer_interrupt+0x6d/0x80
[4067605.163188]  <EOI> 
[4067605.163201] 
[4067605.163215]  [<ffffffff814a9c32>] ? cpuidle_enter_state+0x52/0xc0
[4067605.163232]  [<ffffffff814a9c28>] ? cpuidle_enter_state+0x48/0xc0
[4067605.163258]  [<ffffffff814a9d65>] cpuidle_idle_call+0xc5/0x200
[4067605.163286]  [<ffffffff8101d14e>] arch_cpu_idle+0xe/0x30
[4067605.163314]  [<ffffffff810c67c1>] cpu_startup_entry+0xf1/0x290
[4067605.163345]  [<ffffffff8104228a>] start_secondary+0x1ba/0x230
[4067605.164528] Code:42 0f 00 45 89 e6 48 01 c2 43 8d 44 6d 00 39 d0 73 26 49 c1 e5 08 89 d2 4d 63 f4 49 63 c5 48 c1 e2 08 48 c1 e0 08 48 63 ca 48 99 <48> f7 f9 48 98 4c 0f af f0 49 c1 ee 08 8b 43 78 c1 e0 08 44 29 
[4067605.166869] RIP  [<ffffffff814a9279>] intel_pstate_timer_func+0x179/0x3d0
[4067605.168060]  RSP <ffff883fff4e3db8>