rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10446 ticks this GP) idle=d62/1/0x4000000000000000 softirq=43275/43279 fqs=5092 (t=10500 jiffies g=65277 q=477) NMI backtrace for cpu 0 CPU: 0 PID: 20521 Comm: syz-executor.3 Not tainted 5.11.0-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+0xfa/0x151 lib/dump_stack.c:120 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+0x222/0x2a7 kernel/rcu/tree_stall.h:341 print_cpu_stall kernel/rcu/tree_stall.h:622 [inline] check_cpu_stall kernel/rcu/tree_stall.h:697 [inline] rcu_pending kernel/rcu/tree.c:3830 [inline] rcu_sched_clock_irq.cold+0x4f7/0x11dd kernel/rcu/tree.c:2650 update_process_times+0x16d/0x200 kernel/time/timer.c:1796 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1369 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106 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:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:lockdep_rht_mutex_is_held+0x2/0x90 lib/rhashtable.c:48 Code: fd ff ff e8 10 77 f5 fd e9 dd fc ff ff 48 89 df e8 03 77 f5 fd e9 ab fc ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 54 <55> 53 48 89 fb e8 e4 2e b2 fd 48 c7 c0 8c c7 c5 8d 48 ba 00 00 00 RSP: 0018:ffffc90000007a38 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: ffff888011d99bc0 RSI: ffffffff88541a81 RDI: ffff8880842d1690 RBP: ffff888072020bc0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8854165e R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880842d0d00 R14: 1ffff92000000f80 R15: ffff88801405d100 __rhashtable_lookup+0x59a/0x780 include/linux/rhashtable.h:594 rhltable_lookup include/linux/rhashtable.h:688 [inline] sta_info_hash_lookup net/mac80211/sta_info.c:162 [inline] sta_info_get_bss+0x144/0x3f0 net/mac80211/sta_info.c:199 __ieee80211_rx_handle_packet net/mac80211/rx.c:4694 [inline] ieee80211_rx_list+0x910/0x2680 net/mac80211/rx.c:4819 ieee80211_rx_napi+0xf7/0x3d0 net/mac80211/rx.c:4842 ieee80211_rx include/net/mac80211.h:4524 [inline] ieee80211_tasklet_handler+0xd4/0x130 net/mac80211/main.c:235 tasklet_action_common.constprop.0+0x1d7/0x2d0 kernel/softirq.c:555 __do_softirq+0x29b/0x9f6 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __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:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:debug_lockdep_rcu_enabled+0x23/0x30 kernel/rcu/update.c:280 Code: cc cc cc cc cc cc cc 8b 05 ae 1c c4 04 85 c0 74 21 8b 05 2c 4d c4 04 85 c0 74 17 65 48 8b 04 25 00 f0 01 00 8b 80 84 09 00 00 <85> c0 0f 94 c0 0f b6 c0 c3 cc cc cc cc 55 53 48 c7 c3 c0 5f 03 00 RSP: 0018:ffffc900159a76b0 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81593d71 RDX: fffffbfff1b8b2c2 RSI: 0000000000000008 RDI: ffffffff8dc59608 RBP: 1ffff92002b34edb R08: 0000000000000000 R09: ffffffff8dc5960f R10: fffffbfff1b8b2c1 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: dffffc0000000000 R15: 00007f2571860000 rcu_read_lock_held_common kernel/rcu/update.c:104 [inline] rcu_read_lock_sched_held+0xd/0x70 kernel/rcu/update.c:123 trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x5be/0x710 kernel/locking/lockdep.c:5521 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_unlock+0x12/0x40 kernel/locking/spinlock.c:183 spin_unlock include/linux/spinlock.h:394 [inline] zap_pte_range mm/memory.c:1332 [inline] zap_pmd_range mm/memory.c:1380 [inline] zap_pud_range mm/memory.c:1409 [inline] zap_p4d_range mm/memory.c:1430 [inline] unmap_page_range+0xf98/0x2650 mm/memory.c:1451 unmap_single_vma+0x198/0x300 mm/memory.c:1496 unmap_vmas+0x16d/0x2f0 mm/memory.c:1528 exit_mmap+0x2a8/0x590 mm/mmap.c:3220 __mmput+0x122/0x470 kernel/fork.c:1082 mmput+0x58/0x60 kernel/fork.c:1103 exit_mm kernel/exit.c:501 [inline] do_exit+0xb6f/0x2ae0 kernel/exit.c:812 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x42c/0x2100 kernel/signal.c:2773 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:208 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0033:0x40d494 Code: Unable to access opcode bytes at RIP 0x40d46a. RSP: 002b:00007f2570df71a0 EFLAGS: 00000206 RAX: 00000000004d2388 RBX: 000000000056c160 RCX: 0000000000465ef9 RDX: 00000000004fa060 RSI: 00007f2570df71c0 RDI: 0000000000000001 RBP: 000000000056c158 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000246 R12: 000000000056c164 R13: 00007fff88d56a8f R14: 00007f2570df7300 R15: 0000000000022000