BUG: MAX_LOCKDEP_KEYS too low! turning off the locking correctness validator. CPU: 1 UID: 0 PID: 2570 Comm: syz.0.13670 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 register_lock_class+0x4a4/0x560 kernel/locking/lockdep.c:1332 __lock_acquire+0x3d7/0x1a40 kernel/locking/lockdep.c:5112 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:182 spin_lock_bh include/linux/spinlock.h:348 [inline] some_qdisc_is_busy net/sched/sch_generic.c:1352 [inline] dev_deactivate_many+0x816/0x1050 net/sched/sch_generic.c:1404 dev_deactivate+0x109/0x1d0 net/sched/sch_generic.c:1419 dev_qdisc_change_tx_queue_len+0x2c0/0x390 net/sched/sch_generic.c:1475 netif_change_tx_queue_len+0x153/0x190 net/core/dev.c:9940 do_setlink.isra.0+0xc54/0x3e60 net/core/rtnetlink.c:3238 rtnl_group_changelink net/core/rtnetlink.c:3863 [inline] __rtnl_newlink net/core/rtnetlink.c:4031 [inline] rtnl_newlink+0x1b7e/0x2380 net/core/rtnetlink.c:4159 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:7076 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2556 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg net/socket.c:790 [inline] ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2684 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2738 __sys_sendmsg+0x160/0x210 net/socket.c:2770 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9f4059e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9f41441028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f9f40825fa0 RCX: 00007f9f4059e0d9 RDX: 0000000000000000 RSI: 0000200000000180 RDI: 0000000000000003 RBP: 00007f9f40635024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9f40826038 R14: 00007f9f40825fa0 R15: 00007ffe54210f98 gretap1: refused to change device tx_queue_len A link change request failed with some changes committed already. Interface gretap1 may have been left with an inconsistent configuration, please check.