watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.2.20:490] Modules linked in: CPU: 1 PID: 490 Comm: syz.2.20 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline] RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline] RIP: 0010:kvm_wait+0xce/0x130 arch/x86/kernel/kvm.c:926 Code: 38 f0 75 26 41 f7 c4 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d 33 1e b8 03 f4 eb 0e 0f 1f 44 00 00 0f 00 2d 24 1e b8 03 fb f4 <4c> 89 64 24 18 ff 74 24 18 9d 48 c7 44 24 20 0e 36 e0 45 4b c7 04 RSP: 0018:ffffc90000b379a0 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff8881113a3288 RCX: ffffffff814bed9a RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff8881113a3288 RBP: ffffc90000b37a50 R08: ffff8881113a3288 R09: 1ffff11022274651 R10: dffffc0000000000 R11: ffffed1022274652 R12: 0000000000000246 R13: 1ffff11022274651 R14: dffffc0000000000 R15: 1ffff92000166f38 FS: 000055557641e500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbefa7faac0 CR3: 000000011b5fc000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:564 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x714/0xb70 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock include/linux/spinlock.h:184 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0xe4/0xf0 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:360 [inline] lock_sock_nested+0x90/0x2a0 net/core/sock.c:3125 lock_sock include/net/sock.h:1697 [inline] tipc_release+0x56/0x1490 net/tipc/socket.c:626 __sock_release net/socket.c:597 [inline] sock_close+0xe0/0x270 net/socket.c:1286 __fput+0x2fb/0x770 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x127/0x190 kernel/task_work.c:189 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fbefa7ad379 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:00007ffd14a02618 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fbefa9fada0 RCX: 00007fbefa7ad379 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fbefa9fada0 R08: 0000000000000006 R09: 0000000000000000 R10: 00007fbefa9facb0 R11: 0000000000000246 R12: 000000000000bcd8 R13: 00007fbefa9f909c R14: 000000000000b9fd R15: 00007fbefa9f9090 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 491 Comm: syz.2.20 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:tipc_node_distr_xmit+0x6/0x3b0 net/tipc/node.c:1747 Code: 80 00 00 00 75 11 31 c0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 b8 c5 16 00 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 <41> 56 41 55 41 54 53 48 83 e4 e0 48 81 ec e0 00 00 00 49 89 f7 48 RSP: 0018:ffffc90000d96a88 EFLAGS: 00000246 RAX: 1ffff11022274646 RBX: dffffc0000000000 RCX: ffff8881185613c0 RDX: 0000000000000000 RSI: ffffc90000d96c40 RDI: ffff88812884e040 RBP: ffffc90000d96a90 R08: ffff8881113a328b R09: 1ffff11022274651 R10: dffffc0000000000 R11: ffffed1022274652 R12: ffffc90000d96ec0 R13: ffff8881113a3200 R14: 0000000000000000 R15: ffff8881113a3200 FS: 00007fbefa6126c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbefa5f0ff8 CR3: 000000011b5fc000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tipc_sk_rcv+0x18ed/0x1dc0 net/tipc/socket.c:2497 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1674 tipc_node_xmit_skb+0xf7/0x150 net/tipc/node.c:1739 tipc_sk_rcv+0x1c46/0x1dc0 net/tipc/socket.c:2518 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1674 tipc_sk_push_backlog net/tipc/socket.c:1306 [inline] tipc_sk_filter_connect net/tipc/socket.c:2253 [inline] tipc_sk_filter_rcv+0x15e5/0x3910 net/tipc/socket.c:2362 tipc_sk_enqueue net/tipc/socket.c:2442 [inline] tipc_sk_rcv+0x742/0x1dc0 net/tipc/socket.c:2493 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1674 tipc_node_xmit_skb net/tipc/node.c:1739 [inline] tipc_node_distr_xmit+0x2a3/0x3b0 net/tipc/node.c:1754 tipc_sk_backlog_rcv+0x17d/0x210 net/tipc/socket.c:2410 sk_backlog_rcv include/net/sock.h:1071 [inline] __release_sock+0x146/0x360 net/core/sock.c:2589 release_sock+0x60/0x1b0 net/core/sock.c:3142 tipc_release+0xbd4/0x1490 net/tipc/socket.c:639 __sock_release net/socket.c:597 [inline] sock_close+0xe0/0x270 net/socket.c:1286 __fput+0x2fb/0x770 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x127/0x190 kernel/task_work.c:189 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fbefa7ad379 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:00007fbefa612028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000203a0 RBX: 00007fbefa9f8fa0 RCX: 00007fbefa7ad379 RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003 RBP: 00007fbefa840d68 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbefa9f9038 R14: 00007fbefa9f8fa0 R15: 00007ffd14a024b8