FYI, we noticed the following commit:

commit: 367a3aa35e7bed10a74bed139f6728916f5d1508 ("sched/fair: Fix wake_affine() for !NUMA_BALANCING")

in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -cpu Haswell,+smep,+smap -smp 2 -m 1G

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


+------------------------------------------------------------------+------------+------------+
|                                                                  | 01cbe29aa8 | 367a3aa35e |
+------------------------------------------------------------------+------------+------------+
| boot_successes                                                   | 12         | 0          |
| boot_failures                                                    | 38         | 59         |
| invoked_oom-killer:gfp_mask=0x                                   | 38         |            |
| Mem-Info                                                         | 38         |            |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 38         |            |
| BUG:unable_to_handle_kernel                                      | 0          | 59         |
| Oops:#[##]                                                       | 0          | 59         |
| Kernel_panic-not_syncing:Fatal_exception_in_interrupt            | 0          | 50         |
| Kernel_panic-not_syncing:Fatal_exception                         | 0          | 9          |
+------------------------------------------------------------------+------------+------------+



[    0.381170] BUG: unable to handle kernel NULL pointer dereference at           (null)
[    0.384178] IP:           (null)
[    0.385393] PGD 0 
[    0.385399] P4D 0 
[    0.386375] 
[    0.388395] Oops: 0010 [#1] PREEMPT SMP KASAN
[    0.390000] Modules linked in:
[    0.390000] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.13.0-rc4-00005-g367a3aa #1
[    0.390000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[    0.390000] task: ffff88002a024040 task.stack: ffff88002a028000
[    0.390000] RIP: 0010:          (null)
[    0.390000] RSP: 0000:ffff88002a02fbf8 EFLAGS: 00010002
[    0.390000] RAX: ffff88002a02fbe0 RBX: 0000000000000001 RCX: 0000000000000000
[    0.390000] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88002a02fc00
[    0.390000] RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88002a02fbe0
[    0.390000] R10: ffff88002a02fa90 R11: 0000000000000000 R12: 0000000000000000
[    0.390000] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88002a2dfb00
[    0.390000] FS:  0000000000000000(0000) GS:ffff88002ae00000(0000) knlGS:0000000000000000
[    0.390000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    0.390000] CR2: 0000000000000000 CR3: 0000000002c13000 CR4: 00000000000406f0
[    0.390000] Call Trace:
[    0.390000]  ? __lock_acquire+0x709/0x996
[    0.390000]  ? __lock_acquire+0x709/0x996
[    0.390000]  ? lock_is_held_type+0x75/0x8f
[    0.390000]  ? select_task_rq+0xf3/0x1d0
[    0.390000]  ? try_to_wake_up+0x26a/0x44f
[    0.390000]  ? wake_up_process+0x1c/0x25
[    0.390000]  ? __alloc_workqueue_key+0x6cc/0x81c
[    0.390000]  ? cpus_read_unlock+0x11e/0x136
[    0.390000]  ? kmem_cache_create+0x2f9/0x3a8
[    0.390000]  ? net_defaults_init+0x85/0x85
[    0.390000]  ? net_ns_init+0x83/0x241
[    0.390000]  ? net_defaults_init+0x85/0x85
[    0.390000]  ? do_one_initcall+0x10a/0x2a4
[    0.390000]  ? kernel_init_freeable+0x417/0x5c8
[    0.390000]  ? rest_init+0x143/0x143
[    0.390000]  ? kernel_init+0x15/0x262
[    0.390000]  ? ret_from_fork+0x2a/0x40
[    0.390000] Code:  Bad RIP value.
[    0.390000] RIP:           (null) RSP: ffff88002a02fbf8
[    0.390000] CR2: 0000000000000000
[    0.390000] ---[ end trace 8fd7d69d2c2fef8c ]---


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