batman_adv: batadv0: Interface deactivated: dummy0 batman_adv: batadv0: Interface deactivated: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 veth1_macvtap: left allmulticast mode Increase LOCKDEP_CIRCULAR_QUEUE_BITS to avoid this warning: ------------[ cut here ]------------ lockdep bfs error:-1 WARNING: kernel/locking/lockdep.c:2059 at print_bfs_bug+0x20/0x40 kernel/locking/lockdep.c:2059, CPU#1: syz.2.1209/11765 Modules linked in: CPU: 1 UID: 0 PID: 11765 Comm: syz.2.1209 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:print_bfs_bug+0x22/0x40 kernel/locking/lockdep.c:2059 Code: 90 90 90 90 90 90 90 90 55 53 89 fb e8 07 ce dd 02 89 c5 e8 60 84 ff ff 85 ed 74 13 83 fb ff 74 16 48 8d 3d e0 e4 40 0d 89 de <67> 48 0f b9 3a 5b 5d c3 cc cc cc cc cc 48 c7 c7 87 16 f3 8c e8 e5 RSP: 0018:ffffc900015ce110 EFLAGS: 00010046 RAX: 000000000000003b RBX: 00000000ffffffff RCX: a94f52b012d49b00 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8ede4ac0 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffff520002b9bc5 R12: ffffffff957c7758 R13: ffffffff926e0390 R14: ffff88802f1f1e40 R15: 000000000000001c FS: 00007ff5ab53e6c0(0000) GS:ffff888126e03000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005643eae54a30 CR3: 000000003981a000 CR4: 00000000003526f0 Call Trace: check_irq_usage kernel/locking/lockdep.c:-1 [inline] check_prev_add kernel/locking/lockdep.c:3169 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x2551/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x117/0x340 kernel/locking/lockdep.c:5868 _raw_spin_lock_nested+0x32/0x50 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:647 raw_spin_rq_lock kernel/sched/sched.h:1558 [inline] task_rq_lock+0xbc/0x470 kernel/sched/core.c:739 class_task_rq_lock_constructor kernel/sched/sched.h:1858 [inline] migrate_disable_switch kernel/sched/core.c:2350 [inline] __schedule+0x1673/0x50a0 kernel/sched/core.c:6749 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7190 irqentry_exit+0x5d8/0x660 kernel/entry/common.c:216 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x16c/0x340 kernel/locking/lockdep.c:5872 Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 b4 c8 14 10 <48> 3b 44 24 58 0f 85 e5 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc900015ce7a0 EFLAGS: 00000206 RAX: a94f52b012d49b00 RBX: 0000000000000000 RCX: a94f52b012d49b00 RDX: 0000000000000002 RSI: ffffffff8cfe1a8a RDI: ffffffff8b3f5660 RBP: ffffffff88d67350 R08: 0000000000000002 R09: ffffffff95005418 R10: 00000000142d218e R11: 00000000a8e2605e R12: 0000000000000000 R13: ffff888034acca30 R14: 0000000000000001 R15: 0000000000000246 rt_spin_lock+0x88/0x3e0 kernel/locking/spinlock_rt.c:56 spin_lock_bh include/linux/spinlock_rt.h:88 [inline] dev_reset_queue+0x110/0x1f0 net/sched/sch_generic.c:1308 netdev_for_each_tx_queue include/linux/netdevice.h:2680 [inline] dev_deactivate_many+0x71f/0xd40 net/sched/sch_generic.c:1374 __dev_close_many+0x152/0x6b0 net/core/dev.c:1740 __dev_close net/core/dev.c:1768 [inline] __dev_change_flags+0x2be/0x680 net/core/dev.c:9732 netif_change_flags+0x88/0x1a0 net/core/dev.c:9797 do_setlink+0xc55/0x41c0 net/core/rtnetlink.c:3158 rtnl_group_changelink net/core/rtnetlink.c:3790 [inline] __rtnl_newlink net/core/rtnetlink.c:3944 [inline] rtnl_newlink+0x14b0/0x1c90 net/core/rtnetlink.c:4072 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6958 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x846/0xa10 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 ____sys_sendmsg+0x508/0x810 net/socket.c:2592 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2646 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2683 [inline] __se_sys_sendmsg net/socket.c:2681 [inline] __x64_sys_sendmsg+0x1a1/0x260 net/socket.c:2681 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff5ad2df749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff5ab53e038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff5ad535fa0 RCX: 00007ff5ad2df749 RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000003 RBP: 00007ff5ad363f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff5ad536038 R14: 00007ff5ad535fa0 R15: 00007ffe0e1428d8 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 55 push %rbp 9: 53 push %rbx a: 89 fb mov %edi,%ebx c: e8 07 ce dd 02 call 0x2ddce18 11: 89 c5 mov %eax,%ebp 13: e8 60 84 ff ff call 0xffff8478 18: 85 ed test %ebp,%ebp 1a: 74 13 je 0x2f 1c: 83 fb ff cmp $0xffffffff,%ebx 1f: 74 16 je 0x37 21: 48 8d 3d e0 e4 40 0d lea 0xd40e4e0(%rip),%rdi # 0xd40e508 28: 89 de mov %ebx,%esi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 5b pop %rbx 30: 5d pop %rbp 31: c3 ret 32: cc int3 33: cc int3 34: cc int3 35: cc int3 36: cc int3 37: 48 c7 c7 87 16 f3 8c mov $0xffffffff8cf31687,%rdi 3e: e8 .byte 0xe8 3f: e5 .byte 0xe5