BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 0 UID: 0 PID: 6541 Comm: kworker/0:3 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: mld mld_ifc_work Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 add_chain_cache kernel/locking/lockdep.c:-1 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3855 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162 stack_depot_save_flags+0x1f4/0x6dc lib/stackdepot.c:690 kasan_save_stack mm/kasan/common.c:48 [inline] kasan_save_track+0x54/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562 poison_kmalloc_redzone mm/kasan/common.c:388 [inline] __kasan_kmalloc+0x9c/0xb4 mm/kasan/common.c:405 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4376 [inline] __kmalloc_noprof+0x2fc/0x4c8 mm/slub.c:4388 kmalloc_noprof include/linux/slab.h:909 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] neigh_alloc net/core/neighbour.c:522 [inline] ___neigh_create+0x6f4/0x21e8 net/core/neighbour.c:656 __neigh_create+0x80/0xa0 net/core/neighbour.c:744 ip_neigh_gw4+0x258/0x384 include/net/route.h:407 ip_neigh_for_gw include/net/route.h:-1 [inline] ip_finish_output2+0x778/0x1240 net/ipv4/ip_output.c:229 __ip_finish_output+0x1b0/0x44c net/ipv4/ip_output.c:-1 ip_finish_output+0x44/0x304 net/ipv4/ip_output.c:323 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip_output+0x264/0x384 net/ipv4/ip_output.c:436 dst_output include/net/dst.h:461 [inline] ip_local_out+0x120/0x15c net/ipv4/ip_output.c:129 iptunnel_xmit+0x450/0x980 net/ipv4/ip_tunnel_core.c:84 udp_tunnel_xmit_skb+0x1d0/0x2f0 net/ipv4/udp_tunnel_core.c:192 geneve_xmit_skb drivers/net/geneve.c:922 [inline] geneve_xmit+0x1f78/0x2b04 drivers/net/geneve.c:1048 __netdev_start_xmit include/linux/netdevice.h:5222 [inline] netdev_start_xmit include/linux/netdevice.h:5231 [inline] xmit_one net/core/dev.c:3839 [inline] dev_hard_start_xmit+0x2b0/0x890 net/core/dev.c:3855 __dev_queue_xmit+0x1600/0x32a8 net/core/dev.c:4725 dev_queue_xmit include/linux/netdevice.h:3361 [inline] neigh_resolve_output+0x550/0x654 net/core/neighbour.c:1595 neigh_output include/net/neighbour.h:547 [inline] ip6_finish_output2+0x1544/0x1c7c net/ipv6/ip6_output.c:141 __ip6_finish_output net/ipv6/ip6_output.c:-1 [inline] ip6_finish_output+0x418/0x7b4 net/ipv6/ip6_output.c:226 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output+0x1e0/0x464 net/ipv6/ip6_output.c:248 dst_output include/net/dst.h:461 [inline] NF_HOOK+0x15c/0x430 include/linux/netfilter.h:318 mld_sendpack+0x764/0xf50 net/ipv6/mcast.c:1860 mld_send_cr net/ipv6/mcast.c:2159 [inline] mld_ifc_work+0x770/0xc38 net/ipv6/mcast.c:2698 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844