------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 0 PID: 28180 at kernel/locking/lockdep.c:1714 print_bfs_bug+0x130/0x1e0 kernel/locking/lockdep.c:1714 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 28180 Comm: kworker/u4:0 Not tainted 5.9.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bond927 bond_netdev_notify_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:231 __warn.cold+0x20/0x4a kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:print_bfs_bug+0x130/0x1e0 kernel/locking/lockdep.c:1714 Code: 5c 08 00 74 2c 48 c7 c7 c0 9f 92 8c e8 49 71 01 00 66 90 85 db 75 05 5b 5d 41 5c c3 89 ee 48 c7 c7 c0 a9 4b 88 e8 12 ca eb ff <0f> 0b 5b 5d 41 5c c3 0f 0b e8 92 04 99 06 85 c0 74 d7 48 c7 c0 f8 RSP: 0018:ffffc90021277538 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff8881fc6ea380 RSI: ffffffff815dafc7 RDI: fffff5200424ee99 RBP: 00000000ffffffff R08: 0000000000000001 R09: ffff8880ae620f8b R10: 0000000000000000 R11: 0000000000000001 R12: ffff8881fc6ea380 R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff9200424eeb6 check_irq_usage+0x5fe/0xb40 kernel/locking/lockdep.c:2261 check_prev_add kernel/locking/lockdep.c:2500 [inline] check_prevs_add kernel/locking/lockdep.c:2601 [inline] validate_chain kernel/locking/lockdep.c:3218 [inline] __lock_acquire+0x2a81/0x5640 kernel/locking/lockdep.c:4426 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:5005 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:159 debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:636 debug_timer_activate kernel/time/timer.c:727 [inline] __mod_timer+0x76b/0xd90 kernel/time/timer.c:1051 __queue_delayed_work+0x1a7/0x270 kernel/workqueue.c:1649 queue_delayed_work_on+0x1a2/0x210 kernel/workqueue.c:1674 queue_delayed_work include/linux/workqueue.h:522 [inline] bond_netdev_notify_work drivers/net/bonding/bond_main.c:1520 [inline] bond_netdev_notify_work+0x235/0x290 drivers/net/bonding/bond_main.c:1507 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds..