WARNING in ttwu_queue

WARNING in ttwu_queue_wakelist
Status: upstream: reported on 2020/07/22 18:22
Reported-by: syzbot+c9cb7a5af4ab24dc9088@syzkaller.appspotmail.com
First crash: 90d, last: 25d

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 1 PID: 2216 at kernel/sched/core.c:2670 __ttwu_queue_wakelist kernel/sched/core.c:2613 [inline]
WARNING: CPU: 1 PID: 2216 at kernel/sched/core.c:2670 ttwu_queue_wakelist kernel/sched/core.c:2674 [inline]
WARNING: CPU: 1 PID: 2216 at kernel/sched/core.c:2670 ttwu_queue_wakelist+0x291/0x340 kernel/sched/core.c:2667
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 2216 Comm: syz-executor.0 Not tainted 5.9.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x198/0x1fd lib/dump_stack.c:118
 panic+0x382/0x7fb kernel/panic.c:231
 __warn.cold+0x20/0x4b kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:ttwu_queue_wakelist kernel/sched/core.c:2670 [inline]
RIP: 0010:ttwu_queue_wakelist+0x291/0x340 kernel/sched/core.c:2667
Code: 0c 24 e9 80 fe ff ff 4c 89 04 24 e8 29 02 66 00 4c 8b 04 24 e9 b1 fe ff ff e8 4b 02 66 00 e9 4c ff ff ff e8 81 02 66 00 eb 89 <0f> 0b e9 9f fe ff ff 48 89 c6 48 c7 c7 00 6a 02 8a 48 89 04 24 e8
RSP: 0018:ffffc90000da8cd0 EFLAGS: 00010046
RAX: 0000000000000001 RBX: ffff8880ae520e20 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000010004 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff89cb6908 R09: ffffffff8b5965bf
R10: fffffbfff16b2cb7 R11: 0000000000000001 R12: 0000000000000001
R13: ffff8880432d4240 R14: 0000000000000001 R15: ffff8880ae500000
 ttwu_queue kernel/sched/core.c:2695 [inline]
 try_to_wake_up+0x51e/0x1350 kernel/sched/core.c:2978
 hrtimer_wakeup+0x43/0x60 kernel/time/hrtimer.c:1778
 __run_hrtimer kernel/time/hrtimer.c:1524 [inline]
 __hrtimer_run_queues+0x6a9/0xfc0 kernel/time/hrtimer.c:1588
 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1650
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x147/0x5f0 arch/x86/kernel/apic/apic.c:1097
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 sysvec_apic_timer_interrupt+0xb2/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x4b/0x80 kernel/locking/spinlock.c:199
Code: c0 b8 6b fc 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 06 a2 d3 01 00 74 25 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 1b 2b 28 f9 65 8b 05 b4 34 d9 77 85 c0 74 02 5d
RSP: 0018:ffffc90006137b50 EFLAGS: 00000282
RAX: 1ffffffff13f8d77 RBX: ffff8880a46b4500 RCX: 1ffffffff16b2531
RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff8880ae535e00 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae535e00
R13: ffff88804805c0c0 R14: 0000000000000000 R15: 0000000000000000
 finish_lock_switch kernel/sched/core.c:3517 [inline]
 finish_task_switch+0x150/0x790 kernel/sched/core.c:3617
 context_switch kernel/sched/core.c:3781 [inline]
 __schedule+0xed1/0x2280 kernel/sched/core.c:4527
 schedule+0xd0/0x2a0 kernel/sched/core.c:4602
 freezable_schedule include/linux/freezer.h:172 [inline]
 do_nanosleep+0x222/0x650 kernel/time/hrtimer.c:1883
 hrtimer_nanosleep+0x1f9/0x430 kernel/time/hrtimer.c:1936
 __do_sys_nanosleep kernel/time/hrtimer.c:1970 [inline]
 __se_sys_nanosleep kernel/time/hrtimer.c:1957 [inline]
 __x64_sys_nanosleep+0x1dc/0x260 kernel/time/hrtimer.c:1957
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c641
Code: 75 14 b8 23 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 64 cd fb ff c3 48 83 ec 08 e8 ea 46 00 00 48 89 04 24 b8 23 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 33 47 00 00 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffea09d4c70 EFLAGS: 00000293 ORIG_RAX: 0000000000000023
RAX: ffffffffffffffda RBX: 00000000001600ca RCX: 000000000045c641
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffea09d4c80
RBP: 0000000000000001 R08: 000000008d8a229c R09: 000000008d8a22a0
R10: 00007ffea09d4d80 R11: 0000000000000293 R12: 000000000118cf40
R13: 000000000118d9c0 R14: ffffffffffffffff R15: 000000000118d09c

======================================================

Crashes (5):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Maintainers
ci-upstream-kasan-gce-root	2020/09/25 19:55	upstream	171d4ff7	4a006f63	.config	log	report	info	linux-kernel@vger.kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-selinux-root	2020/09/19 04:44	upstream	10b82d51	53ce8104	.config	log	report	info	linux-kernel@vger.kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/07/22 08:07	upstream	4fa640dc	128cd85f	.config	log	report		linux-kernel@vger.kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-386	2020/09/14 08:11	upstream	e4c26faa	2d3cdd63	.config	log	report		linux-kernel@vger.kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-386	2020/08/25 00:28	upstream	d012a719	67b599d1	.config	log	report		linux-kernel@vger.kernel.org, tglx@linutronix.de