rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=51529, q=618182 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 4048 (4294999384-4294995336), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 4049 jiffies! g51529 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27304 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x16e2/0x4cd0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6860
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2046
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2248
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4e/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 3379 Comm: kworker/R-krdsd Not tainted 6.15.0-rc5-syzkaller-00038-g707df3375124 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
Workqueue: krdsd rds_connect_worker
RIP: 0010:sch_handle_egress net/core/dev.c:4321 [inline]
RIP: 0010:__dev_queue_xmit+0x29c6/0x3a70 net/core/dev.c:4571
Code: 49 8b 06 48 89 44 24 20 e8 67 0f 16 02 41 89 c6 31 ff 89 c6 e8 9b b5 7f f8 45 85 f6 0f 84 20 01 00 00 e8 6d ab 65 f8 41 89 c6 <31> ff 89 c6 e8 81 b5 7f f8 45 85 f6 0f 84 35 03 00 00 e8 33 b1 7f
RSP: 0018:ffffc90000006c80 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff1102aceadc8 RCX: 98f12c2705434d00
RDX: ffff88802fe55a00 RSI: ffffffff8bc1d1c0 RDI: ffff8880b883ab20
RBP: ffffc90000006f90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff893ff7be R12: ffffc90000006e90
R13: ffff888156756e41 R14: 0000000000000001 R15: 1ffff1102aceadc8
FS:  0000000000000000(0000) GS:ffff8881260cb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc121a0e40 CR3: 0000000069388000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 dev_queue_xmit include/linux/netdevice.h:3350 [inline]
 neigh_hh_output include/net/neighbour.h:523 [inline]
 neigh_output include/net/neighbour.h:537 [inline]
 ip_finish_output2+0xd03/0x1160 net/ipv4/ip_output.c:235
 synproxy_send_client_synack+0x8bb/0xe20 net/netfilter/nf_synproxy_core.c:484
 nft_synproxy_eval_v4+0x36e/0x560 net/netfilter/nft_synproxy.c:59
 nft_synproxy_do_eval+0x345/0x570 net/netfilter/nft_synproxy.c:141
 expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
 nft_do_chain+0x40c/0x1920 net/netfilter/nf_tables_core.c:285
 nft_do_chain_inet+0x25d/0x340 net/netfilter/nft_chain_filter.c:161
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xc5/0x220 net/netfilter/core.c:626
 nf_hook include/linux/netfilter.h:269 [inline]
 NF_HOOK+0x206/0x3a0 include/linux/netfilter.h:312
 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:314
 __netif_receive_skb_one_core net/core/dev.c:5887 [inline]
 __netif_receive_skb+0x143/0x380 net/core/dev.c:6000
 process_backlog+0x60e/0x14f0 net/core/dev.c:6352
 __napi_poll+0xc7/0x480 net/core/dev.c:7324
 napi_poll net/core/dev.c:7388 [inline]
 net_rx_action+0x6ea/0xdf0 net/core/dev.c:7510
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:104 [inline]
RIP: 0010:__local_bh_enable_ip+0x135/0x1c0 kernel/softirq.c:414
Code: 8b e8 ef 7b d0 09 65 66 8b 05 2f 89 ef 10 66 85 c0 75 5a bf 01 00 00 00 e8 a8 08 0b 00 e8 53 86 41 00 fb 65 8b 05 0b 89 ef 10 <85> c0 75 05 e8 72 bd ad ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc9000bcaf860 EFLAGS: 00000286
RAX: 0000000080000000 RBX: 0000000000000201 RCX: 98f12c2705434d00
RDX: 0000000000000006 RSI: ffffffff8d74aa4f RDI: ffffffff8bc1d1e0
RBP: ffffc9000bcaf8f0 R08: ffffffff8f7ed977 R09: 1ffffffff1efdb2e
R10: dffffc0000000000 R11: fffffbfff1efdb2f R12: ffffffff89cdcfd0
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92001795f0c
 tcp_close+0x30/0x110 net/ipv4/tcp.c:3248
 inet_release+0x187/0x210 net/ipv4/af_inet.c:435
 __sock_release net/socket.c:647 [inline]
 sock_release+0x85/0x150 net/socket.c:675
 rds_tcp_conn_path_connect+0x37d/0x680 net/rds/tcp_connect.c:191
 rds_connect_worker+0x1d8/0x290 net/rds/threads.c:176
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17a0 kernel/workqueue.c:3319
 rescuer_thread+0x53c/0xdd0 kernel/workqueue.c:3496
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4e/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>