BUG: MAX_LOCKDEP_KEYS too low! turning off the locking correctness validator. CPU: 0 UID: 0 PID: 13217 Comm: syz.4.1770 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 register_lock_class+0x2a9/0x2e0 kernel/locking/lockdep.c:1332 __lock_acquire+0xad/0x2cf0 kernel/locking/lockdep.c:5112 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_lock_bh+0x36/0x50 kernel/locking/spinlock.c:182 spin_lock_bh include/linux/spinlock.h:348 [inline] dev_reset_queue+0x138/0x1b0 include/net/sch_generic.h:738 netdev_for_each_tx_queue include/linux/netdevice.h:2706 [inline] dev_deactivate_many+0x72a/0xd40 net/sched/sch_generic.c:1372 __dev_close_many+0x180/0x6e0 net/core/dev.c:1760 netif_close_many+0x225/0x420 net/core/dev.c:1801 unregister_netdevice_many_notify+0xb50/0x22c0 net/core/dev.c:12388 unregister_netdevice_many net/core/dev.c:12481 [inline] unregister_netdevice_queue+0x31f/0x360 net/core/dev.c:12291 unregister_netdevice include/linux/netdevice.h:3443 [inline] __tun_detach+0x6d9/0x15d0 drivers/net/tun.c:621 tun_detach drivers/net/tun.c:637 [inline] tun_chr_close+0x10a/0x1c0 drivers/net/tun.c:3438 __fput+0x44f/0xa60 fs/file_table.c:510 task_work_run+0x1d9/0x270 kernel/task_work.c:233 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x70f/0x22c0 kernel/exit.c:975 do_group_exit+0x21b/0x2d0 kernel/exit.c:1117 get_signal+0x1284/0x1330 kernel/signal.c:3037 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9b46d9cdd9 Code: Unable to access opcode bytes at 0x7f9b46d9cdaf. RSP: 002b:00007f9b44ff60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f9b47016098 RCX: 00007f9b46d9cdd9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f9b47016098 RBP: 00007f9b47016090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9b47016128 R14: 00007ffccfa7c0c0 R15: 00007ffccfa7c1a8