rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1):
	(detected by 0, t=10502 jiffies, g=123977, q=85)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295021990-4295011488), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g123977 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=35589
rcu: rcu_preempt kthread starved for 10502 jiffies! g123977 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:26384 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0xc07/0x11f0 kernel/sched/core.c:5940
 schedule+0x14b/0x210 kernel/sched/core.c:6019
 schedule_timeout+0x1aa/0x2f0 kernel/time/timer.c:1879
 rcu_gp_fqs_loop kernel/rcu/tree.c:1996 [inline]
 rcu_gp_kthread+0x10fd/0x1720 kernel/rcu/tree.c:2169
 kthread+0x453/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10654 Comm: syz-executor.4 Not tainted 5.14.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x1b2/0x6100 kernel/locking/lockdep.c:4914
Code: 00 00 44 89 ac 24 88 00 00 00 44 89 bc 24 d8 00 00 00 4c 8b 7c 24 58 4d 8d a7 e8 09 00 00 4c 89 e0 48 c1 e8 03 48 89 44 24 70 <42> 8a 04 00 84 c0 0f 85 9b 28 00 00 45 8b 2c 24 48 c7 c0 80 a7 70
RSP: 0018:ffffc90000dc06e0 EFLAGS: 00000806
RAX: 1ffff11011e1b4c5 RBX: ffffffff8f879d00 RCX: 1ffff920001b80fc
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff909614c0
RBP: ffffc90000dc0a70 R08: dffffc0000000000 R09: 0000000000000001
R10: fffffbfff1b74bee R11: 0000000000000000 R12: ffff88808f0da628
R13: 0000000000000001 R14: 0000000000000000 R15: ffff88808f0d9c40
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000014a53ad CR3: 0000000081a9f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire+0x182/0x4a0 kernel/locking/lockdep.c:5625
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xb3/0x100 kernel/locking/spinlock.c:159
 debug_object_activate+0x97/0x6a0 lib/debugobjects.c:656
 debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
 debug_activate kernel/time/hrtimer.c:475 [inline]
 enqueue_hrtimer kernel/time/hrtimer.c:982 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1554 [inline]
 __hrtimer_run_queues+0x594/0xa60 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:56 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x44/0x2f0 mm/kasan/generic.c:189
Code: 0f 82 8d 02 00 00 48 89 fb 48 c1 eb 2f 81 fb fe ff 01 00 0f 86 7a 02 00 00 49 89 fc 49 c1 ec 03 49 b8 00 00 00 00 00 fc ff df <4f> 8d 0c 04 4c 8d 54 37 ff 49 c1 ea 03 49 bd 01 00 00 00 00 fc ff
RSP: 0018:ffffc9000a69f1b8 EFLAGS: 00000a06
RAX: 0000000000000001 RBX: 000000000001ffff RCX: ffffffff81cf106c
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea0001fb43c0
RBP: 1ffffd40003f6879 R08: dffffc0000000000 R09: fffffbfff1f5e5b1
R10: fffffbfff1f5e5b1 R11: 0000000000000000 R12: 1ffffd40003f6878
R13: 00fff00000000002 R14: 0000000000000000 R15: ffffea0001fb43c8
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
 PageSlab include/linux/page-flags.h:345 [inline]
 __page_memcg+0xbc/0x160 include/linux/memcontrol.h:402
 page_memcg include/linux/memcontrol.h:455 [inline]
 lock_page_memcg+0x162/0x460 mm/memcontrol.c:2016
 page_remove_rmap+0x2b/0x1080 mm/rmap.c:1345
 zap_pte_range+0x8ba/0x1b90 mm/memory.c:1362
 zap_pmd_range mm/memory.c:1481 [inline]
 zap_pud_range mm/memory.c:1510 [inline]
 zap_p4d_range mm/memory.c:1531 [inline]
 unmap_page_range+0x745/0xa20 mm/memory.c:1552
 unmap_vmas+0x1d1/0x360 mm/memory.c:1629
 exit_mmap+0x3ed/0x7a0 mm/mmap.c:3201
 __mmput+0x111/0x370 kernel/fork.c:1101
 exit_mm+0x60a/0x770 kernel/exit.c:501
 do_exit+0x6ae/0x2510 kernel/exit.c:812
 do_group_exit+0x168/0x2d0 kernel/exit.c:922
 get_signal+0x16b0/0x2080 kernel/signal.c:2808
 arch_do_signal_or_restart+0x8e/0x6d0 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x191/0x220 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:302
 do_syscall_64+0x4c/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665e9
Code: Unable to access opcode bytes at RIP 0x4665bf.
RSP: 002b:00007efcc300f218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000056bf88 RCX: 00000000004665e9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88
RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c
R13: 00007ffe8042932f R14: 00007efcc300f300 R15: 0000000000022000