linux-kernel - [next] WARNING: CPU: 0 PID: 0 at kernel/sched/core.c:9469 sched

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Date:   Tue, 21 Dec 2021 20:22:10 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     open list <linux-kernel@...r.kernel.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <Dietmar.Eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Christian Brauner <christian@...uner.io>,
        "Eric W. Biederman" <ebiederm@...ssion.com>
Subject: [next] WARNING: CPU: 0 PID: 0 at kernel/sched/core.c:9469 sched_init

[ Please ignore this email if it is already reported ]

While booting Linux next 20211221 on x86_64, i386, arm and arm64.
the following kernel crash reported.

kernel warning while booting.

Starting kernel ...
[    0.000000] Linux version 5.16.0-rc6-next-20211221
(tuxmake@...make) (x86_64-linux-gnu-gcc (Debian 11.2.0-10) 11.2.0, GNU
ld (GNU Binutils for Debian) 2.37) #1 SMP PREEMPT @1640092006
<trim>
[    0.106683] ------------[ cut here ]------------
[    0.106684] WARNING: CPU: 0 PID: 0 at kernel/sched/core.c:9469
sched_init+0x417/0x534
[    0.106689] Modules linked in:
[    0.106692] CPU: 0 PID: 0 Comm: swapper Not tainted
5.16.0-rc6-next-20211221 #1
[    0.106694] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.5 11/26/2020
[    0.106696] RIP: 0010:sched_init+0x417/0x534
[    0.106698] Code: ff 05 69 0d e1 ff 65 4c 8b 24 25 40 ad 01 00 48
c7 c7 00 a9 37 a0 4c 89 e6 e8 d1 ed f8 fd 4c 89 e7 e8 f9 ba 07 fe 84
c0 74 02 <0f> 0b e8 5e 12 ea fe 31 db 45 31 ed 49 c7 c4 40 9d 02 00 89
c6 65
[    0.106700] RSP: 0000:ffffffffa0203ea0 EFLAGS: 00010002
[    0.106702] RAX: 0000000000000001 RBX: ffff944aa7ba9d40 RCX: 0000000000000001
[    0.106703] RDX: ffffffffa0700160 RSI: ffffffff9fe13fc0 RDI: ffff94474007c028
[    0.106704] RBP: ffffffffa0203ec8 R08: 0000000000000080 R09: 0000000000000000
[    0.106706] R10: ffff94474007c000 R11: 00000000000273c0 R12: ffffffffa0218940
[    0.106707] R13: 0000000000000000 R14: 0000000000029d40 R15: ffff944aa7ba9e40
[    0.106708] FS:  0000000000000000(0000) GS:ffff944aa7a00000(0000)
knlGS:0000000000000000
[    0.106710] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    0.106711] CR2: ffff9447d3201000 CR3: 0000000192c10001 CR4: 00000000000606b0
[    0.106712] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    0.106713] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    0.106714] Call Trace:
[    0.106716]  <TASK>
[    0.106718]  start_kernel+0x3e0/0x695
[    0.106722]  x86_64_start_reservations+0x24/0x26
[    0.106724]  x86_64_start_kernel+0xa0/0xa6
[    0.106727]  secondary_startup_64_no_verify+0xd5/0xdb
[    0.106730]  </TASK>
[    0.106731] ---[ end trace 0000000000000000 ]---
[    0.107612] Dynamic Preempt: voluntary
[    0.107632] rcu: Preemptible hierarchical RCU implementation.
[    0.107633] rcu: RCU event tracing is enabled.
[    0.107634] rcu: RCU restricting CPUs from N#
R_CPUS=64 to nr_cpu_ids=4.
[    0.107636] Trampoline variant of Tasks RCU enabled.
[    0.107636] Rude variant of Tasks RCU enabled.
[    0.107637] rcu: RCU calculated value of scheduler-enlistment delay
is 100 jiffies.
[    0.107638] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
[    0.108792] NR_IRQS: 4352, nr_irqs: 456, preallocated irqs: 16
[    0.109168] kfence: initialized - using 2097152 bytes for 255
objects at 0x(____ptrval____)-0x(____ptrval____)

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

Test log link,
https://qa-reports.linaro.org/lkft/linux-next-master-sanity/build/next-20211221/testrun/6972816/suite/linux-log-parser/test/check-kernel-warning-4190375/log
https://lkft.validation.linaro.org/scheduler/job/4190375#L475

metadata:
---------
  git branch: master
  git repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
  git commit: 2850c2311ef4bf30ae8dd8927f0f66b026ff08fb
  git describe: next-20211221
  make_kernelversion: 5.16.0-rc6
  kernel-config: https://builds.tuxbuild.com/22b2KawnzAREmulZd4tc18MxX1C/config

--
Linaro LKFT
https://lkft.linaro.org