rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2688 jiffies s: 68909 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 12045 Comm: syz.0.2822 Not tainted 6.1.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:__lock_acquire+0x3f1/0x1f80 kernel/locking/lockdep.c:4987
Code: 00 00 48 89 e8 48 c1 e8 03 48 89 44 24 58 0f b6 04 10 84 c0 0f 85 1d 13 00 00 31 c0 48 89 6c 24 10 83 7d 00 00 0f 95 c0 09 c3 <c1> e3 0d 44 09 fb 8b 44 24 50 c1 e0 0f 0f b7 c0 09 d8 8b 7c 24 68
RSP: 0018:ffffc90000006e40 EFLAGS: 00000006
RAX: 0000000000000001 RBX: 0000000000000003 RCX: ffff888027fed940
RDX: dffffc0000000000 RSI: ffff888027fee420 RDI: ffff8880b982a4d8
RBP: ffff888027fee404 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff888027fed940 R14: ffff8880b982a4d8 R15: 0000000000000062
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd9f736a991 CR3: 000000000d08e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
 hrtimer_interrupt+0xf7/0x980 kernel/time/hrtimer.c:1793
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:unwind_next_frame+0x5/0x2220 arch/x86/kernel/unwind_orc.c:423
Code: 41 5e 41 5f c3 44 89 f1 80 e1 07 80 c1 03 38 c1 7c 95 4c 89 f7 e8 4b 7a a5 00 eb 8b 66 0f 1f 84 00 00 00 00 00 55 41 57 41 56 <41> 55 41 54 53 48 81 ec a8 00 00 00 48 89 fb 49 be 00 00 00 00 00
RSP: 0018:ffffc90000007320 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc90000007340 RCX: ffffffff8fdaf000
RDX: dffffc0000000000 RSI: ffffffff81f75d33 RDI: ffffc90000007340
RBP: ffffc900000073d0 R08: 0000000000000015 R09: ffffc90000007430
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888027fed940
R13: ffffffff81785b50 R14: ffffc90000007420 R15: 0000000000000000
 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1724 [inline]
 slab_free_freelist_hook mm/slub.c:1750 [inline]
 slab_free mm/slub.c:3661 [inline]
 kmem_cache_free+0x292/0x510 mm/slub.c:3683
 kfree_skb include/linux/skbuff.h:1220 [inline]
 ip6_mc_input+0x9bf/0xbd0 net/ipv6/ip6_input.c:589
 NF_HOOK+0x39d/0x450 include/linux/netfilter.h:302
 __netif_receive_skb_one_core net/core/dev.c:5528 [inline]
 __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5642
 process_backlog+0x381/0x760 net/core/dev.c:5970
 __napi_poll+0xc7/0x470 net/core/dev.c:6537
 napi_poll net/core/dev.c:6604 [inline]
 net_rx_action+0x70f/0xeb0 net/core/dev.c:6718
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 __do_softirq kernel/softirq.c:605 [inline]
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:102 [inline]
RIP: 0010:do_raw_spin_unlock+0x9d/0x8a0 kernel/locking/spinlock_debug.c:140
Code: 6f 10 4d 89 ec 49 c1 ec 03 41 80 3c 1c 00 74 08 4c 89 ef e8 35 48 76 00 65 48 8b 2d 9d 98 96 7e 49 39 6d 00 0f 85 30 02 00 00 <4d> 8d 77 08 4c 89 f3 48 c1 eb 03 48 b8 00 00 00 00 00 fc ff df 0f
RSP: 0018:ffffc900034df4c8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff816bd664
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888073fbbdf0
RBP: ffff888027fed940 R08: dffffc0000000000 R09: ffffed100e7f77bf
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100e7f77c0
R13: ffff888073fbbe00 R14: ffff888055d80140 R15: ffff888073fbbdf0
 __raw_spin_unlock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_unlock+0x1a/0x40 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 dentry_unlink_inode+0x1ad/0x400 fs/dcache.c:398
 __dentry_kill+0x436/0x650 fs/dcache.c:611
 shrink_dentry_list+0x3d9/0x700 fs/dcache.c:1206
 shrink_dcache_parent+0xc9/0x4a0
 do_one_tree+0x23/0xe0 fs/dcache.c:1687
 shrink_dcache_for_umount+0x79/0x120 fs/dcache.c:1704
 generic_shutdown_super+0x63/0x340 fs/super.c:473
 kill_anon_super fs/super.c:1128 [inline]
 kill_litter_super+0x72/0xa0 fs/super.c:1137
 deactivate_locked_super+0xa0/0x110 fs/super.c:332
 cleanup_mnt+0x490/0x520 fs/namespace.c:1186
 task_work_run+0x246/0x300 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa73/0x26a0 kernel/exit.c:871
 do_group_exit+0x202/0x2b0 kernel/exit.c:1021
 get_signal+0x16f7/0x17d0 kernel/signal.c:2870
 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f465ad79e79
Code: Unable to access opcode bytes at 0x7f465ad79e4f.
RSP: 002b:00007f465baf4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: fffffffffffffff5 RBX: 00007f465af15f80 RCX: 00007f465ad79e79
RDX: 0000000000000070 RSI: 0000000020000440 RDI: 0000000000000005
RBP: 00007f465ade793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f465af15f80 R15: 00007ffd1ff41078
 </TASK>