BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 1 PID: 29581 Comm: kworker/u4:7 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bond1140 bond_alb_monitor Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 add_chain_cache kernel/locking/lockdep.c:3637 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3736 [inline] validate_chain kernel/locking/lockdep.c:3757 [inline] __lock_acquire.cold+0x372/0x3ab kernel/locking/lockdep.c:5015 lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 kfence_guarded_free+0x2d/0x940 mm/kfence/core.c:359 __kfence_free+0x70/0x150 mm/kfence/core.c:817 do_slab_free mm/slub.c:3480 [inline] slab_free mm/slub.c:3493 [inline] kmem_cache_free+0x4f1/0x5d0 mm/slub.c:3508 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:700 __kfree_skb net/core/skbuff.c:757 [inline] kfree_skb net/core/skbuff.c:774 [inline] kfree_skb+0x140/0x3f0 net/core/skbuff.c:768 ip6gre_tunnel_xmit+0x80e/0xe70 net/ipv6/ip6_gre.c:923 __netdev_start_xmit include/linux/netdevice.h:4987 [inline] netdev_start_xmit include/linux/netdevice.h:5001 [inline] xmit_one net/core/dev.c:3590 [inline] dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3606 sch_direct_xmit+0x19f/0xbc0 net/sched/sch_generic.c:342 __dev_xmit_skb net/core/dev.c:3817 [inline] __dev_queue_xmit+0x149c/0x3630 net/core/dev.c:4194 alb_send_lp_vid+0x41e/0x560 drivers/net/bonding/bond_alb.c:938 alb_send_learning_packets+0xba/0x2a0 drivers/net/bonding/bond_alb.c:1000 bond_alb_monitor+0x8e5/0x1670 drivers/net/bonding/bond_alb.c:1526 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 bond3: (slave bridge4): failed to get link speed/duplex net_ratelimit: 23 callbacks suppressed bond3: (slave bridge4): failed to get link speed/duplex bond3: (slave bridge4): failed to get link speed/duplex bond3: (slave bridge4): failed to get link speed/duplex bond3: (slave bridge4): failed to get link speed/duplex bond3: (slave bridge4): failed to get link speed/duplex bond3: (slave bridge4): failed to get link speed/duplex bond3: (slave bridge4): failed to get link speed/duplex bond3: (slave bridge4): failed to get link speed/duplex net_ratelimit: 14 callbacks suppressed bond3: (slave bridge4): failed to get link speed/duplex bond3: (slave bridge4): failed to get link speed/duplex bond3: (slave bridge4): failed to get link speed/duplex bond3: (slave bridge4): failed to get link speed/duplex