FYI, we noticed the following commit:

commit: 7684b56d008c9141492e00de32c6c7b9ef0066d2 ("x86/idt: Hide set_intr_gate()")
https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git WIP.x86/apic

in testcase: trinity
with following parameters:

	runtime: 300s

test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/


on test machine: qemu-system-i386 -enable-kvm -smp 2 -m 320M

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+----------------------------------------------------+------------+------------+
|                                                    | b0f4a9654d | 7684b56d00 |
+----------------------------------------------------+------------+------------+
| boot_successes                                     | 8          | 0          |
| boot_failures                                      | 0          | 34         |
| WARNING:at_arch/x86/kernel/idt.c:#update_intr_gate | 0          | 34         |
| EIP:update_intr_gate                               | 0          | 34         |
| BUG:unable_to_handle_kernel                        | 0          | 34         |
| Oops:#[##]                                         | 0          | 34         |
| EIP:native_irq_enable                              | 0          | 20         |
| Kernel_panic-not_syncing:Fatal_exception           | 0          | 34         |
| EIP:hpet_enable                                    | 0          | 13         |
| EIP:get_page_from_freelist                         | 0          | 1          |
| BUG:kernel_in_stage                                | 0          | 3          |
| BUG:kernel_reboot-without-warning_in_boot_stage    | 0          | 1          |
+----------------------------------------------------+------------+------------+



[    0.000000] WARNING: CPU: 0 PID: 0 at arch/x86/kernel/idt.c:355 update_intr_gate+0x16/0x21
[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.13.0-rc6-00088-g7684b56d #66
[    0.000000] task: 41edee00 task.stack: 41ed4000
[    0.000000] EIP: update_intr_gate+0x16/0x21
[    0.000000] EFLAGS: 00210002 CPU: 0
[    0.000000] EAX: 0000000e EBX: 420a4380 ECX: 4222c401 EDX: 41a1c930
[    0.000000] ESI: 3112fa61 EDI: 0209f0e0 EBP: 41ed5f68 ESP: 41ed5f68
[    0.000000]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[    0.000000] CR0: 80050033 CR2: 00000000 CR3: 0222e000 CR4: 00000690
[    0.000000] Call Trace:
[    0.000000]  kvm_apf_trap_init+0x17/0x19
[    0.000000]  trap_init+0x42/0x44
[    0.000000]  start_kernel+0x1c8/0x3d0
[    0.000000]  i386_start_kernel+0xa6/0xaa
[    0.000000]  startup_32_smp+0x164/0x166
[    0.000000] Code: 41 00 75 02 0f 0b b8 00 70 ec 41 ff 15 60 2d ef 41 5b 5e 5d c3 55 89 e5 e8 a0 63 ff fe 0f a3 05 00 14 23 42 0f 92 c1 84 c9 74 04 <0f> ff eb 05 e8 31 0b fd fe 5d c3 55 89 e5 e8 7f 63 ff fe c7 05
[    0.000000] random: get_random_bytes called from print_oops_end_marker+0x52/0x5f with crng_init=0
[    0.000000] ---[ end trace f68728a0d3053b52 ]---


To reproduce:

        git clone https://github.com/01org/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Xiaolong