syzbot

rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10407 ticks this GP) idle=262/1/0x4000000000000000 softirq=34217/34220 fqs=5235 
	(t=10502 jiffies g=47277 q=453)
NMI backtrace for cpu 1
CPU: 1 PID: 17914 Comm: syz-executor.3 Not tainted 5.10.0-rc6-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+0x107/0x163 lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x1e3/0x21e kernel/rcu/tree_stall.h:331
 print_cpu_stall kernel/rcu/tree_stall.h:563 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:637 [inline]
 rcu_pending kernel/rcu/tree.c:3694 [inline]
 rcu_sched_clock_irq.cold+0x472/0xee8 kernel/rcu/tree.c:2567
 update_process_times+0x77/0xd0 kernel/time/timer.c:1709
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
 tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x1ce/0xea0 kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1097
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline]
 sysvec_apic_timer_interrupt+0x48/0x100 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:unwind_next_frame+0x1277/0x1f90 arch/x86/kernel/unwind_orc.c:584
Code: e8 9e 9b 81 00 4c 8b 44 24 18 e9 89 fd ff ff 80 3d 81 b7 a8 0b 00 0f 85 4f f1 ff ff e9 e5 52 7c 07 4c 8b 64 24 60 49 8d 78 02 <48> b9 00 00 00 00 00 fc ff df 49 8d 57 40 48 89 f8 48 c1 e8 03 0f
RSP: 0018:ffffc90000d90598 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff920001b20bb RCX: 0000000000000003
RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffffffff8d62d448
RBP: 0000000000000002 R08: ffffffff8d62d446 R09: ffffffff8d62d44a
R10: 0000000000082081 R11: 0000000000000001 R12: ffffc90000d906c0
R13: ffffc90000d906f5 R14: ffffc90000d90710 R15: ffffc90000d906c0
 __unwind_start+0x51b/0x800 arch/x86/kernel/unwind_orc.c:696
 unwind_start arch/x86/include/asm/unwind.h:60 [inline]
 arch_stack_walk+0x5c/0xe0 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:461
 slab_post_alloc_hook mm/slab.h:526 [inline]
 slab_alloc_node mm/slub.c:2891 [inline]
 slab_alloc mm/slub.c:2899 [inline]
 kmem_cache_alloc+0x122/0x460 mm/slub.c:2904
 skb_clone+0x14f/0x3c0 net/core/skbuff.c:1442
 macvlan_broadcast_enqueue drivers/net/macvlan.c:350 [inline]
 macvlan_handle_frame+0x9b4/0xec0 drivers/net/macvlan.c:478
 __netif_receive_skb_core+0xa0f/0x3870 net/core/dev.c:5205
 __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5309
 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5425
 process_backlog+0x232/0x6c0 net/core/dev.c:6315
 napi_poll net/core/dev.c:6759 [inline]
 net_rx_action+0x4dc/0x1100 net/core/dev.c:6829
 __do_softirq+0x2a0/0x9f6 kernel/softirq.c:298
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0x132/0x200 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:compound_head include/linux/page-flags.h:187 [inline]
RIP: 0010:PageAnon include/linux/page-flags.h:484 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1243 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1357 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1386 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1407 [inline]
RIP: 0010:unmap_page_range+0xba3/0x2640 mm/memory.c:1428
Code: 48 85 ed 0f 84 11 fe ff ff e8 49 bf ce ff 48 8d 45 08 48 89 44 24 18 48 c1 e8 03 42 80 3c 30 00 0f 85 96 17 00 00 48 8b 45 08 <31> ff 49 89 ec 48 89 c3 48 89 84 24 80 00 00 00 83 e3 01 48 89 de
RSP: 0018:ffffc90017eff798 EFLAGS: 00000246
RAX: ffffea0000f3db48 RBX: 0000000000000001 RCX: ffffc90017effa60
RDX: ffff888019263480 RSI: ffffffff81a14537 RDI: ffffc90017effa78
RBP: ffffea000150fac0 R08: 0000000000000000 R09: ffff888019263487
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90017effa80
R13: ffff88802e58ad00 R14: dffffc0000000000 R15: 00000000011a1000
 unmap_single_vma+0x198/0x300 mm/memory.c:1473
 unmap_vmas+0x168/0x2e0 mm/memory.c:1505
 exit_mmap+0x2b1/0x530 mm/mmap.c:3222
 __mmput+0x122/0x470 kernel/fork.c:1079
 mmput+0x53/0x60 kernel/fork.c:1100
 exit_mm kernel/exit.c:486 [inline]
 do_exit+0xa72/0x29b0 kernel/exit.c:796
 do_group_exit+0x125/0x310 kernel/exit.c:906
 get_signal+0x42a/0x1f10 kernel/signal.c:2758
 arch_do_signal+0x82/0x2390 arch/x86/kernel/signal.c:811
 exit_to_user_mode_loop kernel/entry/common.c:161 [inline]
 exit_to_user_mode_prepare+0x100/0x1a0 kernel/entry/common.c:191
 syscall_exit_to_user_mode+0x38/0x260 kernel/entry/common.c:266
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e0f9
Code: Unable to access opcode bytes at RIP 0x45e0cf.
RSP: 002b:00007faae6ff7c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: 0000000020ffc000 RBX: 0000000000000006 RCX: 000000000045e0f9
RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffc000
RBP: 000000000119c128 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000246 R12: 000000000119c0dc
R13: 00007ffc3910eb8f R14: 00007faae6ff89c0 R15: 000000000119c0dc