rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...0: (1 GPs behind) idle=60d4/1/0x4000000000000000 softirq=131040/131043 fqs=5245 rcu: hardirqs softirqs csw/system rcu: number: 0 0 0 rcu: cputime: 0 0 0 ==> 52510(ms) rcu: (detected by 1, t=10502 jiffies, g=193853, q=1384 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3234 Comm: kworker/u4:50 Not tainted 6.4.0-rc6-next-20230614-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Workqueue: netns cleanup_net RIP: 0010:check_region_inline mm/kasan/generic.c:169 [inline] RIP: 0010:kasan_check_range+0xe3/0x190 mm/kasan/generic.c:186 Code: 48 39 d0 74 24 80 38 00 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 74 27 49 39 d1 75 17 49 0f be 01 41 83 e2 07 49 39 c2 73 0a 5b 01 00 00 00 5d 41 5c c3 44 89 c2 e8 dc ee ff ff 83 f0 01 5b 5d RSP: 0018:ffffc90000007b10 EFLAGS: 00000046 RAX: fffffbfff23083d1 RBX: 0000000000000020 RCX: ffffffff81659db4 RDX: fffffbfff23083d1 RSI: 0000000000000008 RDI: ffffffff91841e80 RBP: fffffbfff23083d0 R08: 0000000000000000 R09: fffffbfff23083d0 R10: ffffffff91841e87 R11: 0000000000000001 R12: ffff888067510000 R13: 0000000000000006 R14: 0000000000000006 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555a14cec7f0 CR3: 000000004f8ee000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] __lock_acquire+0xf44/0x5e20 kernel/locking/lockdep.c:5114 lock_acquire.part.0+0x11c/0x370 kernel/locking/lockdep.c:5761 rcu_lock_acquire include/linux/rcupdate.h:302 [inline] rcu_read_lock include/linux/rcupdate.h:748 [inline] advance_sched+0x6e4/0xd20 net/sched/sch_taprio.c:996 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x5a3/0xa40 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x320/0x7b0 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1098 [inline] __sysvec_apic_timer_interrupt+0x14a/0x430 arch/x86/kernel/apic/apic.c:1115 sysvec_apic_timer_interrupt+0x92/0xc0 arch/x86/kernel/apic/apic.c:1109 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:lock_acquire.part.0+0x156/0x370 kernel/locking/lockdep.c:5726 Code: b8 ff ff ff ff 65 0f c1 05 37 88 9c 7e 83 f8 01 0f 85 c7 01 00 00 9c 58 f6 c4 02 0f 85 da 01 00 00 48 85 ed 0f 85 ad 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7 RSP: 0018:ffffc900141af720 EFLAGS: 00000206 RAX: 0000000000000046 RBX: 1ffff92002835ee5 RCX: ffffffff917898c8 RDX: 1ffff1100cea2158 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff23083d1 R10: ffffffff91841e8f R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8cbc2b78 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] kernfs_put.part.0+0x1cf/0x470 fs/kernfs/dir.c:562 kernfs_put+0x46/0x50 fs/kernfs/dir.c:539 kernfs_remove_by_name_ns+0xbc/0x120 fs/kernfs/dir.c:1670 kernfs_remove_by_name include/linux/kernfs.h:618 [inline] remove_files+0x96/0x1c0 fs/sysfs/group.c:28 sysfs_remove_group+0x8b/0x170 fs/sysfs/group.c:288 sysfs_remove_groups fs/sysfs/group.c:312 [inline] sysfs_remove_groups+0x60/0xa0 fs/sysfs/group.c:304 __kobject_del+0x89/0x1f0 lib/kobject.c:588 kobject_cleanup lib/kobject.c:673 [inline] kobject_release lib/kobject.c:713 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x2f1/0x4d0 lib/kobject.c:730 netdev_queue_update_kobjects+0x36b/0x4f0 net/core/net-sysfs.c:1761 remove_queue_kobjects net/core/net-sysfs.c:1858 [inline] netdev_unregister_kobject+0x169/0x280 net/core/net-sysfs.c:2011 unregister_netdevice_many_notify+0xb3a/0x18c0 net/core/dev.c:10851 ip_tunnel_delete_nets+0x2c2/0x3a0 net/ipv4/ip_tunnel.c:1144 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614 process_one_work+0xa34/0x16f0 kernel/workqueue.c:2594 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2745 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308