------------[ cut here ]------------
WARNING: CPU: 1 PID: 29 at net/mptcp/protocol.c:1003 __mptcp_clean_una+0x8b6/0xd30 net/mptcp/protocol.c:1003
Modules linked in:
CPU: 1 PID: 29 Comm: kworker/1:0 Not tainted 6.9.0-rc7-syzkaller-00056-g45db3ab70092 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events mptcp_worker
RIP: 0010:__mptcp_clean_una+0x8b6/0xd30 net/mptcp/protocol.c:1003
Code: e7 48 89 de e8 6b d9 d0 f6 49 39 dc 0f 84 20 fc ff ff e8 0d df d0 f6 48 89 ef e8 35 d3 fe ff e9 0e fc ff ff e8 fb de d0 f6 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 28 48 c1 ea 03
RSP: 0018:ffffc90000887a58 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888040890000 RCX: ffffffff8abce77e
RDX: ffff8880182a0000 RSI: ffffffff8abcedf5 RDI: 0000000000000001
RBP: ffff888054970000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: ffff888054078000
R13: dffffc0000000000 R14: ffff8880549709a8 R15: 0000000000000106
FS:  0000000000000000(0000) GS:ffff88806b300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e836000 CR3: 000000002ff34000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __mptcp_clean_una_wakeup+0x60/0x300 net/mptcp/protocol.c:1053
 mptcp_clean_una_wakeup net/mptcp/protocol.c:1060 [inline]
 __mptcp_retrans+0xf9/0xcc0 net/mptcp/protocol.c:2611
 mptcp_worker+0x895/0x1120 net/mptcp/protocol.c:2763
 process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3267
 process_scheduled_works kernel/workqueue.c:3348 [inline]
 worker_thread+0x6c8/0xf70 kernel/workqueue.c:3429
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>