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Oracle Linux: Panic Caused By Divide Error in intel_pstate_timer_func+365 (UEK3) (Doc ID 2502368.1)

Last updated on MAY 25, 2021

Applies to:

Linux OS - Version Oracle Linux 7.0 with Unbreakable Enterprise Kernel [3.8.13] and later
Linux x86-64


An Oracle Linux 7 (OL7) system running UEK3 crashes and reboots with the following console/vmcore output:

PANIC: "divide error: 0000 [#1] SMP "

Backtrace looks like the following:

> bt
PID: 0 TASK: ffff8817fb2f84c0 CPU: 31 COMMAND: "swapper/31"
#0 [ffff88181fc63aa8] machine_kexec at ffffffff8103fc8a
#1 [ffff88181fc63b10] crash_kexec at ffffffff810c8084
#2 [ffff88181fc63bd8] oops_end at ffffffff81580c30
#3 [ffff88181fc63c00] die at ffffffff810177bb
#4 [ffff88181fc63c30] do_trap at ffffffff81580540
#5 [ffff88181fc63c80] do_divide_error at ffffffff81014d8f
#6 [ffff88181fc63d20] divide_error at ffffffff81588f0e
[exception RIP: intel_pstate_timer_func+365]
RIP: ffffffff8145a08d RSP: ffff88181fc63dd8 RFLAGS: 00010206
RAX: 0000000027100000 RBX: ffff882ff74a7bc0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 000000002e536075
RBP: ffff88181fc63e38 R8: 0000000000003bc3 R9: 000000000000001a
R10: 0000000000000004 R11: 0000000000000005 R12: 0000000000002c5a
R13: 0000000000271000 R14: 0000000000002c5a R15: 0000000000000296
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#7 [ffff88181fc63e40] call_timer_fn at ffffffff8106d3fb
#8 [ffff88181fc63e78] run_timer_softirq at ffffffff8106e01d
#9 [ffff88181fc63ee8] __do_softirq at ffffffff81065708
#10 [ffff88181fc63f48] call_softirq at ffffffff8158919c
#11 [ffff88181fc63f60] do_softirq at ffffffff81016275
#12 [ffff88181fc63f80] irq_exit at ffffffff810659b5
#13 [ffff88181fc63f90] smp_apic_timer_interrupt at ffffffff81589f1e
#14 [ffff88181fc63fb0] apic_timer_interrupt at ffffffff81588a5d
--- <IRQ stack> ---
#15 [ffff8817fb2fbde8] apic_timer_interrupt at ffffffff81588a5d
[exception RIP: cpuidle_wrap_enter+68]
RIP: ffffffff8145ac34 RSP: ffff8817fb2fbe90 RFLAGS: 00000202
RAX: 008baca446af62f1 RBX: 0000000000000086 RCX: 0000000000000018
RDX: 0000000225c17d03 RSI: ffff8817fb2fbfd8 RDI: 008baca446af62f1
RBP: ffff8817fb2fbeb8 R8: 000000000009f5c6 R9: 0000000000000018
R10: 0000000000072bff R11: 0000000000000001 R12: ffff88181fc6dde0
R13: ffff88181fc6dc00 R14: ffffffff810b530b R15: ffff8817fb2fbe10
ORIG_RAX: ffffffffffffff10 CS: 0010 SS: 0018
#16 [ffff8817fb2fbec0] cpuidle_enter_tk at ffffffff8145ac80
#17 [ffff8817fb2fbed0] cpuidle_idle_call at ffffffff8145a9f7
#18 [ffff8817fb2fbf10] cpu_idle at ffffffff8101cea5

In particular, this line:

[exception RIP: intel_pstate_timer_func+365]


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