rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1):
	(detected by 1, t=10502 jiffies, g=46181, q=41)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294982284-4294971782), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g46181 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=25181
rcu: rcu_preempt kthread starved for 10502 jiffies! g46181 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28800 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4339 [inline]
 __schedule+0x916/0x23e0 kernel/sched/core.c:5147
 schedule+0xcf/0x270 kernel/sched/core.c:5226
 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2004 [inline]
 rcu_gp_kthread+0xd07/0x2300 kernel/rcu/tree.c:2177
 kthread+0x3b1/0x4a0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8458 Comm: syz-executor.5 Not tainted 5.13.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:preempt_count_sub+0xa/0x150 kernel/sched/core.c:4826
Code: eb 82 e8 89 f5 6a 00 eb e4 48 89 df e8 7f f5 6a 00 eb 90 e8 78 f5 6a 00 eb ac 66 0f 1f 44 00 00 48 c7 c0 20 47 77 90 53 89 fb <48> ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 83 c0
RSP: 0018:ffffc90000007e08 EFLAGS: 00000046
RAX: ffffffff90774720 RBX: 0000000000000001 RCX: ffffffff815af830
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff8880b9c26380 R08: 0000000000000000 R09: ffff8880b9c26383
R10: ffffed1017384c70 R11: 0000000000000000 R12: 175d03212eba0642
R13: ffff8880b9c26480 R14: ffff8880b9c26380 R15: ffffffff873e4cd0
FS:  0000000002da0400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000014a53ad CR3: 00000000775ab000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
 _raw_spin_unlock_irqrestore+0x3d/0x70 kernel/locking/spinlock.c:191
 __run_hrtimer kernel/time/hrtimer.c:1533 [inline]
 __hrtimer_run_queues+0x51a/0xe40 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:write_comp_data kernel/kcov.c:218 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x3/0x70 kernel/kcov.c:291
Code: 44 89 c6 48 83 c2 01 48 89 4c 38 f0 48 c7 44 38 e0 05 00 00 00 48 89 74 38 e8 4e 89 54 c8 20 48 89 10 c3 0f 1f 40 00 49 89 f8 <bf> 03 00 00 00 4c 8b 14 24 48 89 f1 65 48 8b 34 25 00 f0 01 00 e8
RSP: 0018:ffffc90001d6f800 EFLAGS: 00000246
RAX: 1ffffd40003b13d9 RBX: 800000007627b007 RCX: 0000000000000000
RDX: ffff888028d89c40 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dead000000000100 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81aa0af2 R11: 0000000000000000 R12: 0000000000000010
R13: dffffc0000000000 R14: ffffea0001d89ec0 R15: 0000000000000000
 compound_head include/linux/page-flags.h:186 [inline]
 get_page include/linux/mm.h:1204 [inline]
 copy_present_pte mm/memory.c:875 [inline]
 copy_pte_range mm/memory.c:984 [inline]
 copy_pmd_range mm/memory.c:1064 [inline]
 copy_pud_range mm/memory.c:1101 [inline]
 copy_p4d_range mm/memory.c:1125 [inline]
 copy_page_range+0xe63/0x3fd0 mm/memory.c:1198
 dup_mmap kernel/fork.c:598 [inline]
 dup_mm+0x9ed/0x1380 kernel/fork.c:1374
 copy_mm kernel/fork.c:1426 [inline]
 copy_process+0x5ef9/0x7120 kernel/fork.c:2116
 kernel_clone+0xe7/0xab0 kernel/fork.c:2503
 __do_sys_clone+0xc8/0x110 kernel/fork.c:2620
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x464bcb
Code: ed 0f 85 60 01 00 00 64 4c 8b 0c 25 10 00 00 00 45 31 c0 4d 8d 91 d0 02 00 00 31 d2 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 89 00 00 00 41 89 c5 85 c0 0f 85 90 00 00
RSP: 002b:00007ffc1b3f8010 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000464bcb
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000002da0400
R10: 0000000002da06d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc1b3f8100