rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=237/1/0x4000000000000000 softirq=66354/66355 fqs=989
(detected by 0, t=10502 jiffies, g=92757, q=110)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11633 Comm: syz-executor.3 Tainted: G W 5.17.0-syzkaller-13532-gb4a5ea09b293 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
RIP: 0010:do_raw_spin_lock+0x85/0x2a0 kernel/locking/spinlock_debug.c:114
Code: 00 00 00 48 89 4c 24 60 31 c9 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 da 01 00 00 8b 45 04 <3d> ad 4e ad de 0f 85 76 01 00 00 4c 8d 6d 10 48 b8 00 00 00 00 00
RSP: 0018:ffffc900001e0ca0 EFLAGS: 00000046
RAX: 00000000dead4ead RBX: 1ffff9200003c195 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90782cac
RBP: ffffffff90782ca8 R08: 0000000000000000 R09: ffffffff8db67fd7
R10: fffffbfff1b6cffa R11: 0000000000000000 R12: 0000000000000012
R13: ffffffff89ce48a0 R14: 1ffff9200003c1ad R15: ffff88807b1ae340
FS: 00005555562d1400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa486f9d090 CR3: 0000000015d9f000 CR4: 0000000000350ee0
Call Trace:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
_raw_spin_lock_irqsave+0x41/0x50 kernel/locking/spinlock.c:162
debug_object_deactivate lib/debugobjects.c:735 [inline]
debug_object_deactivate+0x101/0x300 lib/debugobjects.c:723
debug_hrtimer_deactivate kernel/time/hrtimer.c:425 [inline]
debug_deactivate kernel/time/hrtimer.c:481 [inline]
__run_hrtimer kernel/time/hrtimer.c:1653 [inline]
__hrtimer_run_queues+0x3f8/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__syscall_enter_from_user_work kernel/entry/common.c:89 [inline]
RIP: 0010:syscall_enter_from_user_mode+0x2b/0x70 kernel/entry/common.c:110
Code: 54 49 89 f4 55 48 89 fd 48 8b 7c 24 10 e8 ed f5 ff ff eb 27 eb 2b e8 e4 37 21 f8 e8 5f 34 21 f8 fb 65 48 8b 04 25 00 70 02 00 <48> 8b 70 08 40 f6 c6 3f 75 19 4c 89 e0 5d 41 5c c3 eb 1b 0f 0b eb
RSP: 0018:ffffc900039c7f28 EFLAGS: 00000246
RAX: ffff88801e4e0000 RBX: 0000000000000000 RCX: 1ffffffff1b6d675
RDX: 0000000000000000 RSI: ffffffff817ee4b1 RDI: ffffffff895db001
RBP: ffffc900039c7f58 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff817ee498 R11: 0000000000000000 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
do_syscall_64+0x16/0x80 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fa486e3bc8b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007ffe53d99a10 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007fa486e3bc8b
RDX: ffffffffffffffb8 RSI: ffffffffffffffff RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fa486fa05f8
R10: 00007ffe53d99930 R11: 0000000000000293 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe53d99af0
rcu: rcu_preempt kthread starved for 8524 jiffies! g92757 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:28728 pid: 16 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6382
schedule+0xd2/0x1f0 kernel/sched/core.c:6454
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1971
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2144
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 5.17.0-syzkaller-13532-gb4a5ea09b293 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_check_gp_kthread_starvation.cold+0x1fb/0x200 kernel/rcu/tree_stall.h:490
print_other_cpu_stall kernel/rcu/tree_stall.h:595 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:741 [inline]
rcu_pending kernel/rcu/tree.c:3923 [inline]
rcu_sched_clock_irq+0x1f7c/0x2150 kernel/rcu/tree.c:2625
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:243
tick_sched_timer+0xee/0x120 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:116 [inline]
RIP: 0010:acpi_idle_do_entry+0x1c6/0x250 drivers/acpi/processor_idle.c:556
Code: 89 de e8 1d 05 18 f8 84 db 75 ac e8 34 01 18 f8 e8 6f 48 1e f8 eb 0c e8 28 01 18 f8 0f 00 2d 61 84 d1 00 e8 1c 01 18 f8 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 97 03 18 f8 48 85 db
RSP: 0018:ffffffff8ba07d60 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffffffff8babc700 RSI: ffffffff89609c04 RDI: ffffffff89609bf1
RBP: ffff888140b3f864 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff817ee498 R11: 0000000000000000 R12: 0000000000000001
R13: ffff888140b3f800 R14: ffff888140b3f864 R15: ffff888019dd8004
acpi_idle_enter+0x361/0x500 drivers/acpi/processor_idle.c:692
cpuidle_enter_state+0x1b1/0xc80 drivers/cpuidle/cpuidle.c:237
cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:351
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x3e8/0x590 kernel/sched/idle.c:303
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400
start_kernel+0x47f/0x4a0 init/main.c:1140
secondary_startup_64_no_verify+0xc3/0xcb
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 48 89 add %cl,-0x77(%rax)
5: 4c 24 60 rex.WR and $0x60,%al
8: 31 c9 xor %ecx,%ecx
a: 48 c1 ea 03 shr $0x3,%rdx
e: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx
12: 48 89 f8 mov %rdi,%rax
15: 83 e0 07 and $0x7,%eax
18: 83 c0 03 add $0x3,%eax
1b: 38 d0 cmp %dl,%al
1d: 7c 08 jl 0x27
1f: 84 d2 test %dl,%dl
21: 0f 85 da 01 00 00 jne 0x201
27: 8b 45 04 mov 0x4(%rbp),%eax
* 2a: 3d ad 4e ad de cmp $0xdead4ead,%eax <-- trapping instruction
2f: 0f 85 76 01 00 00 jne 0x1ab
35: 4c 8d 6d 10 lea 0x10(%rbp),%r13
39: 48 rex.W
3a: b8 00 00 00 00 mov $0x0,%eax