------------[ cut here ]------------
WARNING: net/mptcp/subflow.c:1520 at subflow_data_ready+0x49b/0x7c0 net/mptcp/subflow.c:1519, CPU#0: kworker/u8:19/20620
Modules linked in:
CPU: 0 UID: 0 PID: 20620 Comm: kworker/u8:19 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: krdsd rds_tcp_accept_worker
RIP: 0010:subflow_data_ready+0x49b/0x7c0 net/mptcp/subflow.c:1519
Code: 48 0f b9 3a e9 c9 fc ff ff e8 81 4d 8e f6 48 89 df 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 6b 0e 00 00 e8 66 4d 8e f6 90 <0f> 0b 90 e9 f2 fd ff ff 90 0f 0b 90 43 0f b6 04 2f 84 c0 0f 85 a1
RSP: 0018:ffffc90000007120 EFLAGS: 00010246
RAX: ffffffff8b32cd9a RBX: ffff888058884380 RCX: ffff888057135b80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888058242ebf R09: 1ffff1100b0485d7
R10: dffffc0000000000 R11: ffffed100b0485d8 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888058242580 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881260c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000002dc030 CR3: 000000005cbb2000 CR4: 00000000003526f0
DR0: 0000000000000008 DR1: 0000000000000002 DR2: 0000000000000081
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 tcp_data_queue+0x201e/0x64a0 net/ipv4/tcp_input.c:5445
 tcp_rcv_established+0xf57/0x2580 net/ipv4/tcp_input.c:6448
 tcp_v6_do_rcv+0x8eb/0x1ba0 net/ipv6/tcp_ipv6.c:1652
 tcp_v6_rcv+0x2247/0x2ae0 net/ipv6/tcp_ipv6.c:1922
 ip6_protocol_deliver_rcu+0xcb0/0x15c0 net/ipv6/ip6_input.c:438
 ip6_input_finish+0x191/0x370 net/ipv6/ip6_input.c:489
 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318
 ip6_input+0x16a/0x270 net/ipv6/ip6_input.c:500
 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318
 __netif_receive_skb_one_core net/core/dev.c:6079 [inline]
 __netif_receive_skb+0xd3/0x380 net/core/dev.c:6192
 process_backlog+0x60e/0x14c0 net/core/dev.c:6544
 __napi_poll+0xc7/0x360 net/core/dev.c:7594
 napi_poll net/core/dev.c:7657 [inline]
 net_rx_action+0x5f7/0xdf0 net/core/dev.c:7784
 handle_softirqs+0x27d/0x850 kernel/softirq.c:622
 do_softirq+0xec/0x180 kernel/softirq.c:523
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x17d/0x1c0 kernel/softirq.c:450
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:936 [inline]
 __dev_queue_xmit+0x1d47/0x3b10 net/core/dev.c:4790
 dev_queue_xmit include/linux/netdevice.h:3365 [inline]
 neigh_hh_output include/net/neighbour.h:531 [inline]
 neigh_output include/net/neighbour.h:545 [inline]
 ip6_finish_output2+0xf70/0x1480 net/ipv6/ip6_output.c:136
 NF_HOOK_COND include/linux/netfilter.h:307 [inline]
 ip6_output+0x340/0x550 net/ipv6/ip6_output.c:247
 NF_HOOK include/linux/netfilter.h:318 [inline]
 ip6_xmit+0x11b5/0x1970 net/ipv6/ip6_output.c:371
 inet6_csk_xmit+0x4db/0x780 net/ipv6/inet6_connection_sock.c:120
 __tcp_transmit_skb+0x2092/0x3aa0 net/ipv4/tcp_output.c:1628
 tcp_transmit_skb net/ipv4/tcp_output.c:1646 [inline]
 tcp_write_xmit+0x16e8/0x6940 net/ipv4/tcp_output.c:2999
 __tcp_push_pending_frames+0x97/0x360 net/ipv4/tcp_output.c:3182
 __tcp_close+0x617/0xfe0 net/ipv4/tcp.c:3207
 tcp_close+0x28/0x110 net/ipv4/tcp.c:3298
 inet_release+0x144/0x190 net/ipv4/af_inet.c:437
 __sock_release net/socket.c:653 [inline]
 sock_release+0x85/0x150 net/socket.c:681
 rds_tcp_accept_one+0x71a/0x930 net/rds/tcp_listen.c:214
 rds_tcp_accept_worker+0x3e/0xa0 net/rds/tcp.c:529
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>