------------[ cut here ]------------ mptcp_pm_is_kernel(msk) WARNING: net/mptcp/pm.c:446 at mptcp_pm_alloc_anno_list+0x8bc/0x980 net/mptcp/pm.c:446, CPU#1: kworker/1:0/23487 Modules linked in: CPU: 1 UID: 0 PID: 23487 Comm: kworker/1:0 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: events mptcp_worker RIP: 0010:mptcp_pm_alloc_anno_list+0x8bc/0x980 net/mptcp/pm.c:446 Code: 40 31 f6 e9 bf fd ff ff e8 e1 40 31 f6 90 0f 0b 90 e9 de f7 ff ff e8 d3 40 31 f6 90 0f 0b 90 e9 34 f8 ff ff e8 c5 40 31 f6 90 <0f> 0b 90 31 c0 e9 76 ff ff ff 48 c7 c1 e0 54 30 90 80 e1 07 80 c1 RSP: 0018:ffffc9000367f360 EFLAGS: 00010293 RAX: ffffffff8b94770b RBX: 0000000000000000 RCX: ffff8880276c8000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88802b3eec50 R08: 0000000000020003 R09: 00000000aa1414ac R10: 00000000aa1414ac R11: 0000000000000000 R12: ffff88802b3ee200 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88807319da00 FS: 0000000000000000(0000) GS:ffff88812539e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000030505ff8 CR3: 0000000052fb6000 CR4: 00000000003526f0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: mptcp_pm_create_subflow_or_signal_addr+0x1363/0x1860 net/mptcp/pm_kernel.c:373 mptcp_pm_nl_subflow_established net/mptcp/pm_kernel.c:443 [inline] __mptcp_pm_kernel_worker+0x19ee/0x2100 net/mptcp/pm_kernel.c:1573 mptcp_pm_worker+0x1bb/0x300 net/mptcp/pm.c:1105 mptcp_worker+0xd3/0x1420 net/mptcp/protocol.c:2990 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3397 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3478 kthread+0x389/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245