watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.2.47:544] Modules linked in: CPU: 0 PID: 544 Comm: syz.2.47 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] RIP: 0010:kvm_wait+0x105/0x150 arch/x86/kernel/kvm.c:918 Code: 1d d6 03 f4 eb 87 fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07 40 38 f0 75 10 66 90 0f 00 2d 3d 1d d6 03 fb f4 5e ff ff ff fb e9 58 ff ff ff e8 5b 52 7d 03 89 f9 80 e1 07 38 RSP: 0018:ffffc90000ac76c0 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff88811ae20f88 RCX: ffffffff81500419 RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88811ae20f88 RBP: ffffc90000ac7750 R08: ffff88811ae20f88 R09: 1ffff110235c41f1 R10: dffffc0000000000 R11: ffffed10235c41f2 R12: 1ffff1103ee00001 R13: ffff8881f7038ad4 R14: dffffc0000000000 R15: 1ffff92000158ed8 FS: 00007faa3540c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000000 CR3: 000000011b4e2000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:597 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x60f/0x9c0 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [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:188 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0xe4/0xf0 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:369 [inline] lock_sock_nested+0x95/0x2a0 net/core/sock.c:3278 lock_sock include/net/sock.h:1743 [inline] tipc_sendstream+0x47/0x70 net/tipc/socket.c:1549 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2435 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2489 __sys_sendmsg net/socket.c:2518 [inline] __do_sys_sendmsg net/socket.c:2527 [inline] __se_sys_sendmsg net/socket.c:2525 [inline] __x64_sys_sendmsg+0x206/0x2f0 net/socket.c:2525 x64_sys_call+0x4b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7faa355a7339 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:00007faa3540c028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007faa357e2fa0 RCX: 00007faa355a7339 RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 0000000000000004 RBP: 00007faa3563ad68 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007faa357e3038 R14: 00007faa357e2fa0 R15: 00007ffc33f74508 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 545 Comm: syz.2.47 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:__rhashtable_lookup include/linux/rhashtable.h:594 [inline] RIP: 0010:rhashtable_lookup include/linux/rhashtable.h:638 [inline] RIP: 0010:tipc_sk_lookup+0xfb/0x5f0 net/tipc/socket.c:2999 Code: 74 08 4c 89 f7 e8 85 7b 10 fd 49 8b 1e e8 ed 2a bf fc e8 98 2a bf fc 48 8d bb c8 10 00 00 48 89 f8 48 c1 e8 03 42 80 3c 20 00 <74> 05 e8 5e 7b 10 fd 48 8b 93 c8 10 00 00 4c 8d bb de 10 00 00 8b RSP: 0018:ffffc90002db66c0 EFLAGS: 00000246 RAX: 1ffff11022f45a19 RBX: ffff888117a2c000 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 000000004464cfc2 RDI: ffff888117a2d0c8 RBP: ffffc90002db67b0 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff520005b6ce8 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff88811f6ec530 R15: 000000004464cfc2 FS: 00007faa353eb6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faa353eaff8 CR3: 000000011b4e2000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tipc_sk_rcv+0x3aa/0x2c20 net/tipc/socket.c:2492 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1703 tipc_node_xmit_skb net/tipc/node.c:1768 [inline] tipc_node_distr_xmit+0x2a3/0x3b0 net/tipc/node.c:1783 tipc_sk_rcv+0x19f7/0x2c20 net/tipc/socket.c:2501 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1703 tipc_sk_push_backlog+0x4dd/0x790 net/tipc/socket.c:1316 tipc_sk_conn_proto_rcv net/tipc/socket.c:1370 [inline] tipc_sk_proto_rcv+0xa65/0x1560 net/tipc/socket.c:2158 tipc_sk_filter_rcv+0x2ac0/0x2cb0 net/tipc/socket.c:2352 tipc_sk_enqueue net/tipc/socket.c:2445 [inline] tipc_sk_rcv+0x794/0x2c20 net/tipc/socket.c:2497 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1703 tipc_node_xmit_skb net/tipc/node.c:1768 [inline] tipc_node_distr_xmit+0x2a3/0x3b0 net/tipc/node.c:1783 tipc_sk_backlog_rcv+0x17d/0x210 net/tipc/socket.c:2412 sk_backlog_rcv include/net/sock.h:1090 [inline] __release_sock+0x17c/0x3f0 net/core/sock.c:2737 release_sock net/core/sock.c:3290 [inline] sock_setsockopt+0x1d7a/0x2490 net/core/sock.c:1381 __sys_setsockopt+0x261/0x470 net/socket.c:2198 __do_sys_setsockopt net/socket.c:2213 [inline] __se_sys_setsockopt net/socket.c:2210 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2210 x64_sys_call+0x982/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:55 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7faa355a7339 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:00007faa353eb028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007faa357e3090 RCX: 00007faa355a7339 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007faa3563ad68 R08: 0000000000000004 R09: 0000000000000000 R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000 R13: 00007faa357e3128 R14: 00007faa357e3090 R15: 00007ffc33f74508