BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 4921 Comm: kworker/1:11 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Workqueue: ipv6_addrconf addrconf_dad_work
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1b40/0x6544 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162
 __debug_check_no_obj_freed lib/debugobjects.c:968 [inline]
 debug_check_no_obj_freed+0x148/0x46c lib/debugobjects.c:1009
 slab_free_hook mm/slub.c:1704 [inline]
 slab_free_freelist_hook+0x104/0x1ec mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 __kmem_cache_free+0xc0/0x224 mm/slub.c:3700
 kfree+0xd0/0x1ac mm/slab_common.c:988
 skb_free_head net/core/skbuff.c:762 [inline]
 skb_release_data+0x43c/0x648 net/core/skbuff.c:791
 skb_release_all net/core/skbuff.c:856 [inline]
 __kfree_skb net/core/skbuff.c:870 [inline]
 consume_skb+0xa0/0x104 net/core/skbuff.c:1035
 netlink_broadcast+0xf30/0x108c net/netlink/af_netlink.c:1521
 nlmsg_multicast include/net/netlink.h:1071 [inline]
 nlmsg_notify+0xf4/0x1d8 net/netlink/af_netlink.c:2554
 rtnl_notify+0xa0/0xd8 net/core/rtnetlink.c:796
 __neigh_notify+0x1a4/0x300 net/core/neighbour.c:3525
 neigh_cleanup_and_release+0x104/0x3bc net/core/neighbour.c:102
 neigh_del net/core/neighbour.c:226 [inline]
 neigh_remove_one+0x318/0x420 net/core/neighbour.c:247
 neigh_forced_gc net/core/neighbour.c:280 [inline]
 neigh_alloc net/core/neighbour.c:486 [inline]
 ___neigh_create+0x450/0x2424 net/core/neighbour.c:649
 __neigh_create+0x44/0x58 net/core/neighbour.c:738
 ip6_finish_output2+0x167c/0x1844 net/ipv6/ip6_output.c:129
 __ip6_finish_output net/ipv6/ip6_output.c:205 [inline]
 ip6_finish_output+0x594/0x930 net/ipv6/ip6_output.c:216
 NF_HOOK_COND include/linux/netfilter.h:291 [inline]
 ip6_output+0x274/0x500 net/ipv6/ip6_output.c:237
 dst_output include/net/dst.h:453 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xc38/0x1680 net/ipv6/ndisc.c:513
 ndisc_send_rs+0x378/0x514 net/ipv6/ndisc.c:723
 addrconf_dad_completed+0x658/0xb40 net/ipv6/addrconf.c:4296
 addrconf_dad_work+0x934/0x10e4 net/ipv6/addrconf.c:-1
 process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292
 worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850