BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 8712 Comm: syz.7.884 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 dump_backtrace+0x1c0/0x1ec 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+0xf4/0x15c 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+0x1864/0x6800 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x6c/0xb0 kernel/locking/spinlock.c:162
 lock_timer_base+0x11c/0x224 kernel/time/timer.c:999
 __mod_timer+0xe4/0xb48 kernel/time/timer.c:1080
 mod_timer+0x2c/0x3c kernel/time/timer.c:1190
 neigh_add_timer+0x1a4/0x26c net/core/neighbour.c:312
 __neigh_event_send+0x664/0x1490 net/core/neighbour.c:-1
 neigh_event_send_probe include/net/neighbour.h:469 [inline]
 neigh_event_send include/net/neighbour.h:475 [inline]
 neigh_resolve_output+0x180/0x650 net/core/neighbour.c:1552
 neigh_output include/net/neighbour.h:545 [inline]
 ip6_finish_output2+0xd5c/0x1840 net/ipv6/ip6_output.c:138
 __ip6_finish_output net/ipv6/ip6_output.c:205 [inline]
 ip6_finish_output+0x594/0x92c 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]
 ip6_xmit+0x1164/0x1a24 net/ipv6/ip6_output.c:357
 inet6_csk_xmit+0x374/0x5c0 net/ipv6/inet6_connection_sock.c:135
 __tcp_transmit_skb+0x17d8/0x2b88 net/ipv4/tcp_output.c:1405
 tcp_transmit_skb net/ipv4/tcp_output.c:1423 [inline]
 tcp_connect+0x1a50/0x3de0 net/ipv4/tcp_output.c:3941
 tcp_v6_connect+0xde0/0x139c net/ipv6/tcp_ipv6.c:342
 __inet_stream_connect+0x1f4/0xc3c net/ipv4/af_inet.c:668
 inet_stream_connect+0x74/0xb0 net/ipv4/af_inet.c:739
 mptcp_connect+0x43c/0x660 net/mptcp/protocol.c:3898
 __inet_stream_connect+0x1f4/0xc3c net/ipv4/af_inet.c:668
 inet_stream_connect+0x74/0xb0 net/ipv4/af_inet.c:739
 __sys_connect_file net/socket.c:2010 [inline]
 __sys_connect+0x28c/0x2b4 net/socket.c:2027
 __do_sys_connect net/socket.c:2037 [inline]
 __se_sys_connect net/socket.c:2034 [inline]
 __arm64_sys_connect+0x7c/0x94 net/socket.c:2034
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585