rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (3402 ticks this GP) idle=f82/1/0x4000000000000000 softirq=38165/38165 fqs=5188 
	(t=10501 jiffies g=57597 q=131193)
NMI backtrace for cpu 1
CPU: 1 PID: 19310 Comm: syz-executor.3 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_ip arch/x86/kernel/unwind_orc.c:30 [inline]
RIP: 0010:__orc_find+0x6f/0xf0 arch/x86/kernel/unwind_orc.c:52
Code: 72 4d 4c 89 e0 48 29 e8 48 89 c2 48 c1 e8 3f 48 c1 fa 02 48 01 d0 48 d1 f8 48 8d 5c 85 00 48 89 d8 48 c1 e8 03 42 0f b6 14 38 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 48 48 63 03 48 01
RSP: 0018:ffffc90000d90778 EFLAGS: 00000216
RAX: 1ffffffff1a029bd RBX: ffffffff8d014de8 RCX: ffffffff81c57696
RDX: 0000000000000000 RSI: ffffffff8d6f9dd2 RDI: ffffffff8d014de8
RBP: ffffffff8d014de8 R08: ffffffff8d6f9dd8 R09: ffffffff8d6f9dd2
R10: 0000000000082081 R11: 000000000002e755 R12: ffffffff8d014de8
R13: ffffffff8d014de8 R14: ffffffff8d014de8 R15: dffffc0000000000
 orc_find arch/x86/kernel/unwind_orc.c:173 [inline]
 unwind_next_frame+0x342/0x1f90 arch/x86/kernel/unwind_orc.c:443
 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:56
 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355
 __kasan_slab_free+0x102/0x140 mm/kasan/common.c:422
 slab_free_hook mm/slub.c:1544 [inline]
 slab_free_freelist_hook+0x5d/0x150 mm/slub.c:1577
 slab_free mm/slub.c:3142 [inline]
 kmem_cache_free+0x82/0x350 mm/slub.c:3158
 inet_bind_bucket_destroy net/ipv4/inet_hashtables.c:91 [inline]
 inet_bind_bucket_destroy+0xdf/0x120 net/ipv4/inet_hashtables.c:87
 inet_twsk_bind_unhash+0x121/0x1b0 net/ipv4/inet_timewait_sock.c:39
 inet_twsk_kill+0x21d/0x470 net/ipv4/inet_timewait_sock.c:59
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1410
 expire_timers kernel/time/timer.c:1455 [inline]
 __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1747
 __run_timers kernel/time/timer.c:1728 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1760
 __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:ffffc9000945f898 EFLAGS: 00000202
RAX: 0000000000009d97 RBX: ffff8880680e8000 RCX: 1ffffffff19d8e91
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed100d01d000 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:kernel_text_address kernel/extable.c:123 [inline]
RIP: 0010:kernel_text_address+0xc1/0xf0 kernel/extable.c:120
Code: 1d 00 84 c0 74 29 b8 01 00 00 00 89 44 24 04 e8 15 c5 9c 07 8b 44 24 04 48 83 c4 08 5d c3 48 89 ef e8 e3 05 33 00 48 83 c4 08 <0f> b6 c0 5d c3 48 89 ef e8 d2 05 33 00 0f b6 c0 eb cf 48 c7 c7 84
RSP: 0018:ffffc9000945f960 EFLAGS: 00000296
RAX: 000000000945fa00 RBX: 000000000045e159 RCX: ffffc9000945f8c0
RDX: 1ffff1100d01d121 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000045e159 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffc9000945fa50
R13: 0000000000000000 R14: ffff8880680e8000 R15: 0000000000000246
 __kernel_text_address+0x9/0x30 kernel/extable.c:105
 unwind_get_return_address arch/x86/kernel/unwind_orc.c:318 [inline]
 unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:313
 arch_stack_walk+0x93/0xe0 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:56
 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355
 __kasan_slab_free+0x102/0x140 mm/kasan/common.c:422
 slab_free_hook mm/slub.c:1544 [inline]
 slab_free_freelist_hook+0x5d/0x150 mm/slub.c:1577
 slab_free mm/slub.c:3142 [inline]
 kfree+0xdb/0x360 mm/slub.c:4124
 do_new_mount fs/namespace.c:2879 [inline]
 path_mount+0x627/0x20c0 fs/namespace.c:3205
 do_mount fs/namespace.c:3218 [inline]
 __do_sys_mount fs/namespace.c:3426 [inline]
 __se_sys_mount fs/namespace.c:3403 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3403
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e159
Code: 0d b4 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f0ff6de0c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e159
RDX: 0000000020000000 RSI: 0000000020000140 RDI: 0000000000000000
RBP: 000000000119bfd0 R08: 0000000020000080 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffdfabfac9f R14: 00007f0ff6de19c0 R15: 000000000119bf8c