BUG: MAX_LOCKDEP_ENTRIES too low!
turning off the locking correctness validator.
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 alloc_list_entry.cold+0x11/0x18 kernel/locking/lockdep.c:1329
 add_lock_to_list kernel/locking/lockdep.c:1350 [inline]
 check_prev_add kernel/locking/lockdep.c:2567 [inline]
 check_prevs_add kernel/locking/lockdep.c:2620 [inline]
 validate_chain kernel/locking/lockdep.c:3237 [inline]
 __lock_acquire+0x3096/0x4e00 kernel/locking/lockdep.c:4344
 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4923
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:353 [inline]
 cache_grow_end+0x46/0x170 mm/slab.c:2661
 cache_alloc_refill mm/slab.c:2981 [inline]
 ____cache_alloc mm/slab.c:3055 [inline]
 ____cache_alloc mm/slab.c:3038 [inline]
 slab_alloc_node mm/slab.c:3250 [inline]
 kmem_cache_alloc_node_trace+0x747/0x790 mm/slab.c:3593
 __do_kmalloc_node mm/slab.c:3615 [inline]
 __kmalloc_node_track_caller+0x38/0x60 mm/slab.c:3630
 __kmalloc_reserve.isra.0+0x39/0xe0 net/core/skbuff.c:142
 pskb_expand_head+0x148/0x1020 net/core/skbuff.c:1627
 __skb_cow include/linux/skbuff.h:3171 [inline]
 skb_cow_head include/linux/skbuff.h:3205 [inline]
 batadv_skb_head_push+0x101/0x290 net/batman-adv/soft-interface.c:74
 batadv_interface_tx+0xf16/0x1620 net/batman-adv/soft-interface.c:329
 __netdev_start_xmit include/linux/netdevice.h:4533 [inline]
 netdev_start_xmit include/linux/netdevice.h:4547 [inline]
 xmit_one net/core/dev.c:3477 [inline]
 dev_hard_start_xmit+0x1a4/0x9b0 net/core/dev.c:3493
 __dev_queue_xmit+0x25e1/0x30a0 net/core/dev.c:4052
 macvlan_queue_xmit drivers/net/macvlan.c:537 [inline]
 macvlan_start_xmit+0x19d/0x7dd drivers/net/macvlan.c:562
 __netdev_start_xmit include/linux/netdevice.h:4533 [inline]
 netdev_start_xmit include/linux/netdevice.h:4547 [inline]
 xmit_one net/core/dev.c:3477 [inline]
 dev_hard_start_xmit+0x1a4/0x9b0 net/core/dev.c:3493
 sch_direct_xmit+0x345/0xc20 net/sched/sch_generic.c:313
 qdisc_restart net/sched/sch_generic.c:376 [inline]
 __qdisc_run+0x4d1/0x17b0 net/sched/sch_generic.c:384
 qdisc_run include/net/pkt_sched.h:134 [inline]
 qdisc_run include/net/pkt_sched.h:126 [inline]
 __dev_xmit_skb net/core/dev.c:3668 [inline]
 __dev_queue_xmit+0x2115/0x30a0 net/core/dev.c:4021
 neigh_hh_output include/net/neighbour.h:499 [inline]
 neigh_output include/net/neighbour.h:508 [inline]
 ip6_finish_output2+0xfb5/0x25b0 net/ipv6/ip6_output.c:117
 __ip6_finish_output+0x442/0xab0 net/ipv6/ip6_output.c:143
 ip6_finish_output+0x34/0x1f0 net/ipv6/ip6_output.c:153
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip6_output+0x239/0x810 net/ipv6/ip6_output.c:176
 dst_output include/net/dst.h:435 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 mld_sendpack+0x961/0xdf0 net/ipv6/mcast.c:1682
 mld_send_cr net/ipv6/mcast.c:1978 [inline]
 mld_ifc_timer_expire+0x42e/0x920 net/ipv6/mcast.c:2477
 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1405
 expire_timers kernel/time/timer.c:1450 [inline]
 __run_timers kernel/time/timer.c:1774 [inline]
 __run_timers kernel/time/timer.c:1741 [inline]
 run_timer_softirq+0x623/0x1600 kernel/time/timer.c:1787
 __do_softirq+0x26c/0x9f7 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x192/0x1d0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:546 [inline]
 smp_apic_timer_interrupt+0x19e/0x600 arch/x86/kernel/apic/apic.c:1140
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61
Code: cc cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 84 de 58 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 74 de 58 00 fb f4 <c3> cc 41 56 41 55 41 54 55 53 e8 43 51 91 f9 e8 9e 08 ca fb 0f 1f
RSP: 0018:ffffffff89807d98 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff1329307 RBX: ffffffff898864c0 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff89886d84
RBP: dffffc0000000000 R08: ffffffff898864c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: fffffbfff1310c98
R13: 0000000000000000 R14: ffffffff8a891480 R15: 0000000000000000
 arch_safe_halt arch/x86/include/asm/paravirt.h:144 [inline]
 default_idle+0x49/0x350 arch/x86/kernel/process.c:697
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x393/0x690 kernel/sched/idle.c:269
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361
 start_kernel+0x862/0x89c init/main.c:1003
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242
neighbour: ndisc_cache: neighbor table overflow!