watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.2.8661:30362] Modules linked in: CPU: 0 PID: 30362 Comm: syz.2.8661 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:spin_trylock_bh include/linux/spinlock.h:415 [inline] RIP: 0010:tipc_sk_rcv+0x375/0x1dc0 net/tipc/socket.c:2492 Code: e8 70 1a 00 00 48 85 c0 4c 8b 64 24 10 0f 84 eb 17 00 00 49 89 c5 48 89 44 24 58 48 8d b8 88 00 00 00 48 89 bc 24 58 01 00 00 36 13 1b 00 41 89 c6 31 ff 89 c6 e8 ca 30 fd fc 45 85 f6 44 89 RSP: 0018:ffffc90001186820 EFLAGS: 00000286 RAX: ffff8881394d8500 RBX: dffffc0000000000 RCX: ffff8881217513c0 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8881394d8588 RBP: ffffc90001186a90 R08: ffff8881394d8583 R09: 1ffff1102729b0b0 R10: dffffc0000000000 R11: ffffed102729b0b1 R12: ffffc90001186c80 R13: ffff8881394d8500 R14: ffff88811b5bb9c0 R15: 000000000ac19549 FS: 00007ff76215a6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff762159ff8 CR3: 000000010b046000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600 Call Trace: 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_rcv+0x18ed/0x1dc0 net/tipc/socket.c:2497 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1674 tipc_sk_push_backlog+0x4dd/0x790 net/tipc/socket.c:1306 tipc_sk_conn_proto_rcv net/tipc/socket.c:1358 [inline] tipc_sk_proto_rcv+0xa65/0x1af0 net/tipc/socket.c:2156 tipc_sk_filter_rcv+0x315a/0x3910 net/tipc/socket.c:2350 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 net/core/sock.c:3142 [inline] sock_setsockopt+0x1840/0x2680 net/core/sock.c:1257 __sys_setsockopt+0x272/0x480 net/socket.c:2142 __do_sys_setsockopt net/socket.c:2157 [inline] __se_sys_setsockopt net/socket.c:2154 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2154 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7ff763720799 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:00007ff76215a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ff76399a090 RCX: 00007ff763720799 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007ff7637b6bd9 R08: 0000000000000004 R09: 0000000000000000 R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff76399a128 R14: 00007ff76399a090 R15: 00007fff164379c8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 30363 Comm: syz.2.8661 Tainted: G W 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:ffffc90000b776e0 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff8881394d8588 RCX: ffffffff814bed9a RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff8881394d8588 RBP: ffffc90000b77790 R08: ffff8881394d8588 R09: 1ffff1102729b0b1 R10: dffffc0000000000 R11: ffffed102729b0b2 R12: 0000000000000246 R13: 1ffff1102729b0b1 R14: dffffc0000000000 R15: 1ffff9200016eee0 FS: 00007ff7621396c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff762138ff8 CR3: 000000010b046000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 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_sendstream+0x47/0x70 net/tipc/socket.c:1540 sock_sendmsg_nosec net/socket.c:652 [inline] __sock_sendmsg net/socket.c:664 [inline] ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2376 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2430 __sys_sendmsg net/socket.c:2459 [inline] __do_sys_sendmsg net/socket.c:2468 [inline] __se_sys_sendmsg net/socket.c:2466 [inline] __x64_sys_sendmsg+0x1f9/0x2c0 net/socket.c:2466 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7ff763720799 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:00007ff762139028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff76399a180 RCX: 00007ff763720799 RDX: 0000000000004004 RSI: 0000200000000080 RDI: 0000000000000004 RBP: 00007ff7637b6bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff76399a218 R14: 00007ff76399a180 R15: 00007fff164379c8