BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 4865 Comm: kworker/u4:8 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Workqueue: krdsd rds_tcp_accept_worker
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
 rps_lock_irqsave net/core/dev.c:224 [inline]
 enqueue_to_backlog+0x90/0xc90 net/core/dev.c:4763
 netif_rx_internal+0x158/0x5d8 net/core/dev.c:5046
 __netif_rx+0xa4/0x11c net/core/dev.c:5066
 loopback_xmit+0x428/0x6d8 drivers/net/loopback.c:89
 __netdev_start_xmit include/linux/netdevice.h:4896 [inline]
 netdev_start_xmit include/linux/netdevice.h:4910 [inline]
 xmit_one net/core/dev.c:3670 [inline]
 dev_hard_start_xmit+0x244/0x8e0 net/core/dev.c:3686
 __dev_queue_xmit+0x155c/0x309c net/core/dev.c:4346
 dev_queue_xmit include/linux/netdevice.h:3051 [inline]
 neigh_hh_output include/net/neighbour.h:529 [inline]
 neigh_output include/net/neighbour.h:543 [inline]
 ip_finish_output2+0xb9c/0x10a4 net/ipv4/ip_output.c:228
 __ip_finish_output+0x1b0/0x448 net/ipv4/ip_output.c:-1
 ip_finish_output+0x40/0x268 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:291 [inline]
 ip_output+0x314/0x414 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:453 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 __ip_queue_xmit+0xcb0/0x16d8 net/ipv4/ip_output.c:532
 ip_queue_xmit+0x5c/0x7c net/ipv4/ip_output.c:546
 __tcp_transmit_skb+0x17c4/0x2b6c net/ipv4/tcp_output.c:1405
 tcp_transmit_skb net/ipv4/tcp_output.c:1423 [inline]
 tcp_send_active_reset+0x3e0/0x94c net/ipv4/tcp_output.c:3524
 __tcp_close+0x434/0xeec net/ipv4/tcp.c:2953
 tcp_close+0x38/0x144 net/ipv4/tcp.c:3077
 inet_release+0x154/0x1d0 net/ipv4/af_inet.c:430
 inet6_release+0x5c/0x78 net/ipv6/af_inet6.c:491
 __sock_release net/socket.c:654 [inline]
 sock_release+0x84/0x140 net/socket.c:682
 rds_tcp_accept_one+0x110/0x8e0 net/rds/tcp_listen.c:229
 rds_tcp_accept_worker+0x44/0xb4 net/rds/tcp.c:529
 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