BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 1 PID: 4331 Comm: syz-executor Not tainted 6.1.147-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/18/2025 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 rmqueue_bulk mm/page_alloc.c:3131 [inline] __rmqueue_pcplist+0x15c/0xed4 mm/page_alloc.c:3785 rmqueue_pcplist mm/page_alloc.c:3827 [inline] rmqueue mm/page_alloc.c:3870 [inline] get_page_from_freelist+0x618/0x1fc0 mm/page_alloc.c:4325 __alloc_pages+0x1cc/0x53c mm/page_alloc.c:5614 alloc_pages+0x434/0x6f8 mm/mempolicy.c:-1 __stack_depot_save+0x36c/0x4b8 lib/stackdepot.c:474 kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x64/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x28/0x34 mm/kasan/generic.c:505 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x74/0x43c mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc+0x234/0x318 mm/slub.c:3422 skb_clone+0x194/0x308 net/core/skbuff.c:1660 dev_queue_xmit_nit+0x210/0x9a4 net/core/dev.c:2321 xmit_one net/core/dev.c:3654 [inline] dev_hard_start_xmit+0x108/0x8e0 net/core/dev.c:3674 __dev_queue_xmit+0x155c/0x309c net/core/dev.c:4334 dev_queue_xmit include/linux/netdevice.h:3051 [inline] neigh_resolve_output+0x550/0x650 net/core/neighbour.c:1563 neigh_output include/net/neighbour.h:544 [inline] ip6_finish_output2+0xd60/0x1844 net/ipv6/ip6_output.c:138 __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] ip6_local_out+0x120/0x15c net/ipv6/output_core.c:161 ip6_send_skb+0x1a0/0x4e4 net/ipv6/ip6_output.c:2009 ip6_push_pending_frames+0xd0/0x118 net/ipv6/ip6_output.c:2030 icmpv6_push_pending_frames+0x278/0x3fc net/ipv6/icmp.c:311 icmp6_send+0xeb4/0x13e4 net/ipv6/icmp.c:632 __icmpv6_send include/linux/icmpv6.h:28 [inline] icmpv6_send include/linux/icmpv6.h:49 [inline] ip6_link_failure+0x44/0x4a8 net/ipv6/route.c:2827 dst_link_failure include/net/dst.h:423 [inline] ipip6_tunnel_xmit net/ipv6/sit.c:1039 [inline] sit_tunnel_xmit+0x8f8/0x1ae4 net/ipv6/sit.c:1076 __netdev_start_xmit include/linux/netdevice.h:4896 [inline] netdev_start_xmit include/linux/netdevice.h:4910 [inline] xmit_one net/core/dev.c:3658 [inline] dev_hard_start_xmit+0x244/0x8e0 net/core/dev.c:3674 __dev_queue_xmit+0x155c/0x309c net/core/dev.c:4334 dev_queue_xmit include/linux/netdevice.h:3051 [inline] neigh_connected_output+0x358/0x3e8 net/core/neighbour.c:1592 neigh_output include/net/neighbour.h:544 [inline] ip6_finish_output2+0xd60/0x1844 net/ipv6/ip6_output.c:138 __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] ip6_local_out+0x120/0x15c net/ipv6/output_core.c:161 ip6tunnel_xmit include/net/ip6_tunnel.h:161 [inline] udp_tunnel6_xmit_skb+0x45c/0x964 net/ipv6/ip6_udp_tunnel.c:109 geneve6_xmit_skb drivers/net/geneve.c:1092 [inline] geneve_xmit+0x20c4/0x2f18 drivers/net/geneve.c:1121 __netdev_start_xmit include/linux/netdevice.h:4896 [inline] netdev_start_xmit include/linux/netdevice.h:4910 [inline] xmit_one net/core/dev.c:3658 [inline] dev_hard_start_xmit+0x244/0x8e0 net/core/dev.c:3674 __dev_queue_xmit+0x155c/0x309c net/core/dev.c:4334 dev_queue_xmit include/linux/netdevice.h:3051 [inline] neigh_resolve_output+0x550/0x650 net/core/neighbour.c:1563 neigh_output include/net/neighbour.h:544 [inline] ip6_finish_output2+0xd60/0x1844 net/ipv6/ip6_output.c:138 __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_rs_timer+0x2f4/0x574 net/ipv6/addrconf.c:3980 call_timer_fn+0x1b8/0x964 kernel/time/timer.c:1504 expire_timers kernel/time/timer.c:1549 [inline] __run_timers+0x460/0x6bc kernel/time/timer.c:1820 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1833 handle_softirqs+0x318/0xc6c kernel/softirq.c:596 __do_softirq+0x14/0x20 kernel/softirq.c:630 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 call_on_irq_stack+0x24/0x30 arch/arm64/kernel/entry.S:849 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85 invoke_softirq kernel/softirq.c:477 [inline] __irq_exit_rcu+0x23c/0x43c kernel/softirq.c:679 irq_exit_rcu+0x14/0x84 kernel/softirq.c:691 __el1_irq arch/arm64/kernel/entry-common.c:472 [inline] el1_interrupt+0x38/0x54 arch/arm64/kernel/entry-common.c:486 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:35 [inline] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] finish_lock_switch+0xb8/0x1c4 kernel/sched/core.c:5003 finish_task_switch+0x120/0x620 kernel/sched/core.c:5121 context_switch kernel/sched/core.c:5247 [inline] __schedule+0xde0/0x1b18 kernel/sched/core.c:6561 schedule+0xc4/0x170 kernel/sched/core.c:6637 do_notify_resume+0x13c/0x2b0c arch/arm64/kernel/signal.c:1120 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x98/0x138 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585