BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 0 PID: 4863 Comm: syz-executor.2 Not tainted 5.15.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 lookup_chain_cache_add kernel/locking/lockdep.c:3736 [inline] validate_chain+0x7e8/0x8240 kernel/locking/lockdep.c:3757 __lock_acquire+0x1382/0x2b00 kernel/locking/lockdep.c:5015 lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 stack_depot_save+0x1bc/0x490 lib/stackdepot.c:308 kasan_save_stack+0x4d/0x60 mm/kasan/common.c:40 kasan_record_aux_stack+0xf1/0x130 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:2987 [inline] call_rcu+0x1c4/0xa80 kernel/rcu/tree.c:3067 radix_tree_node_free lib/radix-tree.c:308 [inline] delete_node+0x1bf/0x7d0 lib/radix-tree.c:571 radix_tree_delete_item+0x2e2/0x3e0 lib/radix-tree.c:1429 kernfs_put+0x30d/0x490 fs/kernfs/dir.c:537 sysfs_put include/linux/sysfs.h:641 [inline] __kobject_del+0xd4/0x310 lib/kobject.c:621 kobject_del+0x41/0x60 lib/kobject.c:643 device_del+0xa1e/0xbf0 drivers/base/core.c:3595 unregister_netdevice_many+0x148b/0x19e0 net/core/dev.c:11077 unregister_netdevice_queue net/core/dev.c:10984 [inline] unregister_netdevice include/linux/netdevice.h:2988 [inline] unregister_netdev+0x19b/0x210 net/core/dev.c:11109 tty_ldisc_close drivers/tty/tty_ldisc.c:474 [inline] tty_ldisc_kill drivers/tty/tty_ldisc.c:629 [inline] tty_ldisc_release+0x362/0x7f0 drivers/tty/tty_ldisc.c:803 tty_release_struct+0x27/0xd0 drivers/tty/tty_io.c:1706 tty_release+0xc5f/0xef0 drivers/tty/tty_io.c:1878 __fput+0x3fe/0x870 fs/file_table.c:280 task_work_run+0x146/0x1c0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x209/0x220 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300 do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7ff81fff072b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffffaeb23f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007ff81fff072b RDX: 00007ff820155148 RSI: ffffffff81ab88e2 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2de20f40 R10: 00000000000006cf R11: 0000000000000293 R12: 0000000000217487 R13: 00000000000003e8 R14: 00007ff820150f60 R15: 000000000021744f