rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10499 ticks this GP) idle=e5e/1/0x4000000000000004 softirq=112614/112614 fqs=5 
	(t=10501 jiffies g=165997 q=124)
NMI backtrace for cpu 0
CPU: 0 PID: 15236 Comm: syz-executor.1 Not tainted 5.5.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
 rcu_pending kernel/rcu/tree.c:2827 [inline]
 rcu_sched_clock_irq.cold+0x509/0xc0d kernel/rcu/tree.c:2271
 update_process_times+0x2d/0x70 kernel/time/timer.c:1726
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:171
 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1314
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1641
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
RIP: 0010:trace_timer_expire_entry include/trace/events/timer.h:90 [inline]
RIP: 0010:call_timer_fn+0x137/0x780 kernel/time/timer.c:1403
Code: c9 48 89 85 38 ff ff ff 48 89 c7 31 d2 31 f6 68 a0 a7 64 81 41 b8 01 00 00 00 e8 74 2f f6 ff 58 0f 1f 44 00 00 e8 69 4f 10 00 <e8> 64 4f 10 00 65 44 8b 35 54 0b 9d 7e bf 3f 00 00 00 44 89 f6 e8
RSP: 0018:ffffc90000007d10 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
RAX: ffff8880358de040 RBX: ffff8880a856e810 RCX: ffffffff815a8cc2
RDX: 0000000000000100 RSI: ffffffff8164a7f7 RDI: 0000000000000282
RBP: ffffc90000007dd8 R08: 00000000000009c7 R09: fffffbfff165e5b5
R10: ffff8880358de9a0 R11: ffff8880358de040 R12: 0000000000000102
R13: ffffc90000007db0 R14: ffff8880ae827240 R15: dffffc0000000000
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786
 __do_softirq+0x262/0x98c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x19b/0x1e0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:check_kcov_mode kernel/kcov.c:153 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x14/0x50 kernel/kcov.c:187
Code: 8b 80 98 13 00 00 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 65 48 8b 04 25 c0 1e 02 00 65 8b 15 14 27 8d 7e <81> e2 00 01 1f 00 48 8b 75 08 75 2b 8b 90 80 13 00 00 83 fa 02 75
RSP: 0018:ffffc900073d7780 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: ffff8880358de040 RBX: 0000000002351080 RCX: ffffc90005f01000
RDX: 0000000080000002 RSI: ffffffff81a21d55 RDI: 0000000000000006
RBP: ffffc900073d7780 R08: ffff8880358de040 R09: fffff9400046a209
R10: fffff9400046a208 R11: ffffea0002351047 R12: 1ffff92000e7aef4
R13: ffffc900073d7800 R14: ffff8880912cb840 R15: ffffea0002351080
 vm_normal_page+0x15d/0x3c0 mm/memory.c:644
 copy_one_pte mm/memory.c:788 [inline]
 copy_pte_range mm/memory.c:841 [inline]
 copy_pmd_range mm/memory.c:892 [inline]
 copy_pud_range mm/memory.c:926 [inline]
 copy_p4d_range mm/memory.c:948 [inline]
 copy_page_range+0xd48/0x2190 mm/memory.c:1010
 dup_mmap kernel/fork.c:604 [inline]
 dup_mm+0xa67/0x1430 kernel/fork.c:1360
 copy_mm kernel/fork.c:1416 [inline]
 copy_process+0x2ad6/0x7230 kernel/fork.c:2072
 _do_fork+0x146/0x1090 kernel/fork.c:2421
 __do_sys_clone kernel/fork.c:2576 [inline]
 __se_sys_clone kernel/fork.c:2557 [inline]
 __x64_sys_clone+0x19a/0x260 kernel/fork.c:2557
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45b349
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f0474331c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f04743326d4 RCX: 000000000045b349
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000070 R14: 00000000004c1bc4 R15: 000000000075bf2c