RBP: 00007f32f822fee0 R08: 0000000000000004 R09: 0000000000000000 R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f32f8406038 R14: 00007f32f8405fa0 R15: 00007ffd23e85758 watchdog: BUG: soft lockup - CPU#1 stuck for 225s! [syz.4.503:1861] CPU#1 Utilization every 22000ms during lockup: #1: 100% system, 0% softirq, 1% hardirq, 0% idle #2: 100% system, 0% softirq, 1% hardirq, 0% idle #3: 100% system, 0% softirq, 1% hardirq, 0% idle #4: 100% system, 0% softirq, 1% hardirq, 0% idle #5: 100% system, 0% softirq, 1% hardirq, 0% idle Modules linked in: CPU: 1 UID: 0 PID: 1861 Comm: syz.4.503 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:tipc_sk_rcv+0x19ee/0x2cc0 net/tipc/socket.c:-1 Code: 01 00 00 e8 14 00 ff ff 48 83 eb 80 49 89 dd 48 89 df be 04 00 00 00 e8 80 71 8b fc bb ff ff ff ff f0 41 0f c1 9e 80 00 00 00 01 00 00 00 89 de e8 46 51 2f fc 83 fb 01 75 0f e8 fc 4c 2f fc RSP: 0018:ffffc900026566e0 EFLAGS: 00000213 RAX: 0000000000000001 RBX: 0000000000000005 RCX: ffffffff85742d10 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888128a234c0 RBP: ffffc90002656970 R08: ffff888128a234c3 R09: 1ffff11025144698 R10: dffffc0000000000 R11: ffffed1025144699 R12: dffffc0000000000 R13: ffff888128a234c0 R14: ffff888128a23440 R15: ffffc90002656b60 FS: 00007f32f91016c0(0000) GS:ffff88826e374000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556ea8e4e8 CR3: 00000001196c0000 CR4: 00000000003526b0 Call Trace: tipc_node_xmit+0x27e/0xe20 net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x2a5/0x3c0 net/tipc/node.c:1781 tipc_sk_rcv+0x19cc/0x2cc0 net/tipc/socket.c:2499 tipc_node_xmit+0x27e/0xe20 net/tipc/node.c:1701 tipc_sk_push_backlog+0x4e2/0x7a0 net/tipc/socket.c:1312 tipc_sk_conn_proto_rcv net/tipc/socket.c:1366 [inline] tipc_sk_proto_rcv+0xa93/0x1640 net/tipc/socket.c:2156 tipc_sk_filter_rcv+0x2adf/0x2d10 net/tipc/socket.c:2350 tipc_sk_enqueue net/tipc/socket.c:2443 [inline] tipc_sk_rcv+0x7fc/0x2cc0 net/tipc/socket.c:2495 tipc_node_xmit+0x27e/0xe20 net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x2a5/0x3c0 net/tipc/node.c:1781 tipc_sk_backlog_rcv+0x17c/0x210 net/tipc/socket.c:2410 sk_backlog_rcv include/net/sock.h:1185 [inline] __release_sock+0x1a3/0x2a0 net/core/sock.c:3213 release_sock+0x60/0x1f0 net/core/sock.c:3795 sockopt_release_sock net/core/sock.c:1161 [inline] sk_setsockopt+0x25e2/0x2b60 net/core/sock.c:1674 sock_setsockopt+0x5a/0x70 net/core/sock.c:1681 do_sock_setsockopt+0x20c/0x410 net/socket.c:2318 __sys_setsockopt net/socket.c:2347 [inline] __do_sys_setsockopt net/socket.c:2353 [inline] __se_sys_setsockopt net/socket.c:2350 [inline] __x64_sys_setsockopt+0x188/0x210 net/socket.c:2350 x64_sys_call+0x233b/0x3040 arch/x86/include/generated/asm/syscalls_64.h:55 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc3/0xc60 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f32f819aef9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f32f9101028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f32f8405fa0 RCX: 00007f32f819aef9 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007f32f822fee0 R08: 0000000000000004 R09: 0000000000000000 R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f32f8406038 R14: 00007f32f8405fa0 R15: 00007ffd23e85758 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 1860 Comm: syz.4.503 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63 Code: 65 31 01 5d c3 cc cc cc cc cc cc b8 0c 67 40 a5 90 90 90 90 90 90 90 90 90 90 90 66 90 0f 00 2d 27 5a 12 00 55 48 89 e5 fb f4 <5d> c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc b8 70 3e 4e 23 RSP: 0018:ffffc900028c7928 EFLAGS: 000002d3 RAX: ffffffff81658e07 RBX: 0000000000000003 RCX: ffff888131d93480 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003 RBP: ffffc900028c7928 R08: ffff888128a23580 R09: 1ffff110251446b0 R10: dffffc0000000000 R11: ffffed10251446b1 R12: 1ffff110251446b0 R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000200 FS: 00005555646f3500(0000) GS:ffff88826e274000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b675fa5780 CR3: 00000001196c0000 CR4: 00000000003526b0 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:73 [inline] kvm_wait+0xcc/0x110 arch/x86/kernel/kvm.c:1101 pv_wait arch/x86/include/asm/paravirt-spinlock.h:83 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:466 [inline] __pv_queued_spin_lock_slowpath+0x7df/0xcf0 kernel/locking/qspinlock.c:325 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:35 [inline] queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:66 [inline] queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_lock_bh+0xe7/0xf0 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:347 [inline] lock_sock_nested+0x8f/0x2a0 net/core/sock.c:3783 lock_sock include/net/sock.h:1709 [inline] tipc_release+0xac/0x16d0 net/tipc/socket.c:637 __sock_release net/socket.c:662 [inline] sock_close+0xd9/0x280 net/socket.c:1455 __fput+0x3ee/0xa50 fs/file_table.c:469 ____fput+0x1c/0x30 fs/file_table.c:497 task_work_run+0x1e3/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] exit_to_user_mode_loop+0xa8/0xd0 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline] do_syscall_64+0x1ea/0xc60 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f32f819aef9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd23e858b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f32f8407da0 RCX: 00007f32f819aef9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f32f8407da0 R08: 0000000000000006 R09: 0000000000000000 R10: 00007f32f8407cb0 R11: 0000000000000246 R12: 000000000000cf44 R13: 00007f32f840609c R14: 000000000000cc37 R15: 00007f32f8406090