rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (2657 ticks this GP) idle=e7e/1/0x4000000000000000 softirq=9432/9432 fqs=379 
	(t=10501 jiffies g=8373 q=316)
rcu: rcu_preempt kthread starved for 393 jiffies! g8373 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:28880 pid:   11 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:3779 [inline]
 __schedule+0x893/0x2130 kernel/sched/core.c:4528
 schedule+0xcf/0x270 kernel/sched/core.c:4606
 schedule_timeout+0x148/0x250 kernel/time/timer.c:1871
 rcu_gp_fqs_loop kernel/rcu/tree.c:1925 [inline]
 rcu_gp_kthread+0xb4c/0x1c90 kernel/rcu/tree.c:2099
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
NMI backtrace for cpu 0
CPU: 0 PID: 8741 Comm: syz-executor143 Not tainted 5.10.0-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+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:orc_find arch/x86/kernel/unwind_orc.c:163 [inline]
RIP: 0010:unwind_next_frame+0x238/0x1f90 arch/x86/kernel/unwind_orc.c:443
Code: ff 39 d6 0f 83 54 12 00 00 48 ba 00 00 00 00 00 fc ff df 41 89 f0 4a 8d 3c 85 b4 f3 fa 8d 49 89 f9 49 c1 e9 03 45 0f b6 0c 11 <48> 89 fa 83 e2 07 83 c2 03 44 38 ca 7c 32 45 84 c9 74 2d 4c 89 44
RSP: 0018:ffffc90000007628 EFLAGS: 00000217
RAX: 0000000000000000 RBX: 1ffff92000000ecd RCX: ffffffff8128e48b
RDX: dffffc0000000000 RSI: 00000000000028e4 RDI: ffffffff8dfb9744
RBP: 0000000000000002 R08: 00000000000028e4 R09: 0000000000000000
R10: 0000000000082081 R11: 0000000000000001 R12: ffffc90000007798
R13: ffffc90000007785 R14: ffffc900000077a0 R15: ffffc90000007750
 __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:535 [inline]
 slab_alloc_node mm/slub.c:2891 [inline]
 slab_alloc mm/slub.c:2899 [inline]
 kmem_cache_alloc+0x1c6/0x440 mm/slub.c:2904
 __build_skb+0x21/0x60 net/core/skbuff.c:311
 __netdev_alloc_skb+0x20d/0x3f0 net/core/skbuff.c:464
 netdev_alloc_skb include/linux/skbuff.h:2826 [inline]
 dev_alloc_skb include/linux/skbuff.h:2839 [inline]
 __ieee80211_beacon_get+0xebe/0x1aa0 net/mac80211/tx.c:4837
 ieee80211_beacon_get_tim+0x88/0x910 net/mac80211/tx.c:4951
 ieee80211_beacon_get include/net/mac80211.h:4912 [inline]
 mac80211_hwsim_beacon_tx+0x111/0x910 drivers/net/wireless/mac80211_hwsim.c:1729
 __iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:792
 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:828
 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1782
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x693/0xea0 kernel/time/hrtimer.c:1583
 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1600
 __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:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:4789
Code: 55 53 65 48 8b 1c 25 00 f0 01 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 52 3a 64 f8 e8 3d a0 8e f8 fb bf 01 00 00 00 <e8> 82 d1 ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 c0 22 64
RSP: 0018:ffffc90001e0f908 EFLAGS: 00000206
RAX: 00000000003eaf93 RBX: ffff88801d7ecec0 RCX: 1ffffffff19d8e91
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed1003afd9d8 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 irqentry_exit_cond_resched kernel/entry/common.c:357 [inline]
 irqentry_exit_cond_resched kernel/entry/common.c:349 [inline]
 irqentry_exit+0x7a/0xa0 kernel/entry/common.c:387
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:native_pmd_val arch/x86/include/asm/pgtable_types.h:393 [inline]
RIP: 0010:pmd_pfn arch/x86/include/asm/pgtable.h:221 [inline]
RIP: 0010:pte_lockptr include/linux/mm.h:2163 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1211 [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+0x720/0x2640 mm/memory.c:1428
Code: 00 48 89 44 24 40 e8 df c2 ce ff 48 8b 7c 24 40 31 f6 ba 10 00 00 00 e8 4e 21 10 00 48 8b 44 24 28 48 c1 e8 03 42 80 3c 30 00 <0f> 85 29 1b 00 00 48 8b 44 24 28 31 ff 4c 8b 2c 24 48 8b 28 49 c1
RSP: 0018:ffffc90001e0f9d8 EFLAGS: 00000246
RAX: 1ffff110024bfa02 RBX: 00000000004d4000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90001e0fae0
RBP: 0000000000000004 R08: 0000000000000001 R09: ffffc90001e0fad0
R10: fffff520003c1f5b R11: 0000000000000000 R12: ffff88801ce80a90
R13: 0000000000000000 R14: dffffc0000000000 R15: 00000000004c7000
 unmap_single_vma+0x198/0x300 mm/memory.c:1473
 unmap_vmas+0x168/0x2e0 mm/memory.c:1505
 exit_mmap+0x2b1/0x530 mm/mmap.c:3220
 __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
 __do_sys_exit_group kernel/exit.c:917 [inline]
 __se_sys_exit_group kernel/exit.c:915 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:915
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x441308
Code: Unable to access opcode bytes at RIP 0x4412de.
RSP: 002b:00007ffde32ba008 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441308
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004c7470 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006db1e0 R14: 000000000000000c R15: 0000000000000004