hrtimer: interrupt took 43322 ns
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=7fa/1/0x4000000000000000 softirq=8094/8095 fqs=9 
	(t=10500 jiffies g=5717 q=393)
rcu: rcu_preempt kthread starved for 10481 jiffies! g5717 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:29296 pid:   13 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4339 [inline]
 __schedule+0xf63/0x23d0 kernel/sched/core.c:5147
 schedule+0xdb/0x280 kernel/sched/core.c:5226
 schedule_timeout+0x133/0x220 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2004 [inline]
 rcu_gp_kthread+0xcf6/0x22c0 kernel/rcu/tree.c:2177
 kthread+0x37d/0x460 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6928 Comm: syz-executor.2 Not tainted 5.13.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:683 [inline]
RIP: 0010:arch_local_irq_save+0x12/0x90 arch/x86/include/asm/paravirt.h:701
Code: 8b 4d c0 4c 8b 45 d0 e9 77 fd ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 48 c7 c0 70 06 76 89 55 48 ba 00 00 00 00 00 fc ff df <48> c1 e8 03 48 89 e5 41 54 80 3c 10 00 75 4d 48 83 3d 07 1a 1f 08
RSP: 0000:ffffc90003b1fd08 EFLAGS: 00000246
RAX: ffffffff89760670 RBX: ffffffff898b45c0 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 00000000ffffffff RDI: ffffffff898b45c0
RBP: ffffc90003b1fd50 R08: 0000000000000000 R09: ffffffff8a806217
R10: fffffbfff1500c42 R11: 0000000000000000 R12: ffff888103758400
R13: ffff888103758da0 R14: ffffc90003b1fe18 R15: 0000000000000000
FS:  00007f761aa79700(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000026c00170 CR3: 000000010425b006 CR4: 00000000001706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_is_held include/linux/lockdep.h:283 [inline]
 rcu_read_lock_sched_held+0x41/0xb0 kernel/rcu/update.c:125
 trace_lock_release include/trace/events/lock.h:58 [inline]
 lock_release+0x665/0x970 kernel/locking/lockdep.c:5523
 up_read+0x16/0x30 kernel/locking/rwsem.c:1448
 mmap_read_unlock include/linux/mmap_lock.h:143 [inline]
 __bad_area+0x5e/0xb0 arch/x86/mm/fault.c:861
 bad_area+0x11/0x20 arch/x86/mm/fault.c:869
 do_user_addr_fault+0x688/0xd70 arch/x86/mm/fault.c:1353
 handle_page_fault arch/x86/mm/fault.c:1475 [inline]
 exc_page_fault+0x6f/0xe0 arch/x86/mm/fault.c:1531
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:577
RIP: 0033:0x40a497
Code: c7 44 24 18 00 00 00 00 8b 7c 24 20 31 d2 be 01 4c 00 00 31 c0 e8 59 7b 05 00 e9 3b fe ff ff 48 6b 44 24 10 18 48 03 44 24 28 <48> 8b 48 10 48 8b 50 08 48 8b 30 8b 7c 24 1c e8 25 b3 00 00 89 44
RSP: 002b:00007f761aa78fc0 EFLAGS: 00010206
RAX: 0000000026c00160 RBX: 000000000052bf00 RCX: 0000000000415827
RDX: 36214504b055dca0 RSI: 0000000000000000 RDI: 00007f761aa795f0
RBP: 0000000000000007 R08: 00007f761aa78fc0 R09: 0000000000000007
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff
R13: 00000000004fd358 R14: 00000000004b69b5 R15: 00007f761aa796bc
NMI backtrace for cpu 0
CPU: 0 PID: 6924 Comm: syz-executor.0 Not tainted 5.13.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x114/0x14e lib/dump_stack.c:120
 nmi_cpu_backtrace.cold+0x30/0x9c lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x120/0x170 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:39
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x23f/0x360 kernel/rcu/tree_stall.h:341
 print_cpu_stall kernel/rcu/tree_stall.h:624 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:699 [inline]
 rcu_pending kernel/rcu/tree.c:3911 [inline]
 rcu_sched_clock_irq.cold+0x63/0x6bb kernel/rcu/tree.c:2649
 update_process_times+0x139/0x1b0 kernel/time/timer.c:1796
 tick_sched_handle+0x77/0x140 kernel/time/tick-sched.c:226
 tick_sched_timer+0x142/0x230 kernel/time/tick-sched.c:1373
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x1b7/0xc30 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x2f3/0x950 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0x143/0x530 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x47/0xc0 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0033:0x403810
Code: 30 31 c0 e8 82 f4 ff ff e9 e3 fd ff ff e8 c8 2b 01 00 48 8d 3d 5e 79 0a 00 8b 30 31 c0 e8 68 f4 ff ff e9 b0 fd ff ff 0f 1f 00 <55> 48 8b 76 10 89 fd 64 8b 04 25 b8 ff ff ff 85 c0 74 0f 48 8d 86
RSP: 002b:00007f4e7758f9f8 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 000000000052bf00 RCX: 0000000000415827
RDX: 00007f4e7758fa00 RSI: 00007f4e7758fb30 RDI: 000000000000000b
RBP: 0000000000000007 R08: 00007f4e7758ffc0 R09: 0000000000000007
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff
R13: 00000000004fd358 R14: 00000000004b69b5 R15: 00007f4e775906bc