rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=b27/1/0x4000000000000000 softirq=28666/28668 fqs=26
(detected by 1, t=10502 jiffies, g=40393, q=27)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7541 Comm: kworker/u4:13 Not tainted 5.18.0-rc2-syzkaller-00219-g028192fea1de #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
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:__raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline]
RIP: 0010:_raw_spin_lock_irq+0x5/0x50 kernel/locking/spinlock.c:170
Code: c9 ff 74 24 08 41 b8 01 00 00 00 31 d2 31 f6 e8 21 d6 fa f7 48 89 ef 58 5d e9 27 4a fb f7 0f 1f 80 00 00 00 00 55 48 89 fd 9c <58> fa f6 c4 02 75 30 bf 01 00 00 00 e8 0a 86 ee f7 45 31 c9 41 b8
RSP: 0018:ffffc90000007e28 EFLAGS: 00000046
RAX: 0000000000010001 RBX: ffff888068db6340 RCX: 0000000000000000
RDX: ffff88807b289d00 RSI: ffffffff81683edb RDI: ffff8880b9c2a5c0
RBP: ffff8880b9c2a5c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff816846fd R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880b9c2a6c0 R14: ffff8880b9c2a5c0 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff4233b8048 CR3: 0000000051354000 CR4: 0000000000350ef0
Call Trace:
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x243/0xe50 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:lock_is_held_type+0xff/0x140 kernel/locking/lockdep.c:5689
Code: 00 00 b8 ff ff ff ff 65 0f c1 05 04 a4 a2 76 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb b9 0f 0b 48
RSP: 0018:ffffc900158ffb78 EFLAGS: 00000286
RAX: 0000000000000046 RBX: 0000000000000003 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8bd81d20 R08: 0000000000000000 R09: ffffffff8db70717
R10: fffffbfff1b6e0e2 R11: 0000000000000000 R12: ffff88807b289d00
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff88807b28a7b0
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x522/0x720 kernel/locking/lockdep.c:5652
rcu_lock_release include/linux/rcupdate.h:273 [inline]
rcu_read_unlock include/linux/rcupdate.h:727 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x86b/0xfa0 net/batman-adv/network-coding.c:719
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
rcu: rcu_preempt kthread timer wakeup didn't happen for 10449 jiffies! g40393 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=23791
rcu: rcu_preempt kthread starved for 10450 jiffies! g40393 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
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:I stack:28728 pid: 16 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388
schedule+0xd2/0x1f0 kernel/sched/core.c:6460
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 1
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.18.0-rc2-syzkaller-00219-g028192fea1de #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 6d 53 16 f8 84 db 75 ac e8 84 4f 16 f8 e8 ef 97 1c f8 eb 0c e8 78 4f 16 f8 0f 00 2d 31 8a cf 00 e8 6c 4f 16 f8 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 e7 51 16 f8 48 85 db
RSP: 0018:ffffc90000177d18 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888011a19d00 RSI: ffffffff8962cc34 RDI: 0000000000000000
RBP: ffff8880167c2064 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817f6448 R11: 0000000000000000 R12: 0000000000000001
R13: ffff8880167c2000 R14: ffff8880167c2064 R15: ffff888019cf8804
acpi_idle_enter+0x361/0x500 drivers/acpi/processor_idle.c:691
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_secondary+0x265/0x340 arch/x86/kernel/smpboot.c:266
secondary_startup_64_no_verify+0xc3/0xcb
----------------
Code disassembly (best guess):
0: c9 leaveq
1: ff 74 24 08 pushq 0x8(%rsp)
5: 41 b8 01 00 00 00 mov $0x1,%r8d
b: 31 d2 xor %edx,%edx
d: 31 f6 xor %esi,%esi
f: e8 21 d6 fa f7 callq 0xf7fad635
14: 48 89 ef mov %rbp,%rdi
17: 58 pop %rax
18: 5d pop %rbp
19: e9 27 4a fb f7 jmpq 0xf7fb4a45
1e: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
25: 55 push %rbp
26: 48 89 fd mov %rdi,%rbp
29: 9c pushfq
* 2a: 58 pop %rax <-- trapping instruction
2b: fa cli
2c: f6 c4 02 test $0x2,%ah
2f: 75 30 jne 0x61
31: bf 01 00 00 00 mov $0x1,%edi
36: e8 0a 86 ee f7 callq 0xf7ee8645
3b: 45 31 c9 xor %r9d,%r9d
3e: 41 rex.B
3f: b8 .byte 0xb8