BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 5818 Comm: syz.4.15683 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3777 [inline]
 validate_chain kernel/locking/lockdep.c:3798 [inline]
 __lock_acquire+0x1864/0x6634 kernel/locking/lockdep.c:5063
 lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x6c/0xb0 kernel/locking/spinlock.c:162
 __stack_depot_save+0x1c8/0x4bc lib/stackdepot.c:479
 kasan_save_stack+0x58/0x70 mm/kasan/common.c:47
 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496
 kvfree_call_rcu+0xb4/0x6f0 kernel/rcu/tree.c:3405
 drop_sysctl_table+0x278/0x3c4 fs/proc/proc_sysctl.c:1731
 unregister_sysctl_table+0x90/0x134 fs/proc/proc_sysctl.c:1769
 unregister_net_sysctl_table+0x20/0x30 net/sysctl_net.c:174
 __devinet_sysctl_unregister net/ipv4/devinet.c:2635 [inline]
 devinet_sysctl_unregister net/ipv4/devinet.c:2663 [inline]
 inetdev_destroy net/ipv4/devinet.c:329 [inline]
 inetdev_event+0x54c/0x12dc net/ipv4/devinet.c:1615
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xd8/0x168 kernel/notifier.c:455
 call_netdevice_notifiers_info net/core/dev.c:2014 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2052 [inline]
 call_netdevice_notifiers net/core/dev.c:2066 [inline]
 unregister_netdevice_many_notify+0xf18/0x1900 net/core/dev.c:11023
 unregister_netdevice_many net/core/dev.c:11077 [inline]
 unregister_netdevice_queue net/core/dev.c:10960 [inline]
 unregister_netdevice include/linux/netdevice.h:3075 [inline]
 unregister_netdev+0x160/0x1dc net/core/dev.c:11095
 sixpack_close+0x13c/0x210 drivers/net/hamradio/6pack.c:627
 tty_ldisc_close drivers/tty/tty_ldisc.c:456 [inline]
 tty_ldisc_kill+0x184/0x2e8 drivers/tty/tty_ldisc.c:614
 tty_ldisc_release+0x210/0x234 drivers/tty/tty_ldisc.c:782
 tty_release_struct+0x34/0xd4 drivers/tty/tty_io.c:1689
 tty_release+0x9c4/0x1174 drivers/tty/tty_io.c:1860
 __fput+0x1b4/0x7b0 fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:348
 task_work_run+0x1f4/0x280 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 do_notify_resume+0x20f8/0x2c84 arch/arm64/kernel/signal.c:1151
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x98/0x128 arch/arm64/kernel/entry-common.c:638
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585