watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.4.232:1230] Modules linked in: CPU: 0 PID: 1230 Comm: syz.4.232 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 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: 1b 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 ed 1a d6 03 fb f4 5e ff ff ff fb e9 58 ff ff ff e8 ab 28 7d 03 89 f9 80 e1 07 38 RSP: 0018:ffffc90000bf7920 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff888125ed1e88 RCX: ffffffff815004cc RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff888125ed1e88 RBP: ffffc90000bf79b0 R08: ffff888125ed1e88 R09: 1ffff11024bda3d1 R10: dffffc0000000000 R11: ffffed1024bda3d2 R12: ffff88823ff52c80 R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff9200017ef24 FS: 00005555642ba500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556b73e4e8 CR3: 0000000136ab1000 CR4: 00000000003506b0 DR0: 0000200000000300 DR1: 0000000000000008 DR2: 0000000000000008 DR3: 0000000000000008 DR6: 00000000ffff0ff0 DR7: 0000000000000600 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+0x605/0x9b0 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_release+0xb3/0x1610 net/tipc/socket.c:639 __sock_release net/socket.c:649 [inline] sock_close+0xb8/0x200 net/socket.c:1336 __fput+0x22b/0x900 fs/file_table.c:311 ____fput+0x15/0x20 fs/file_table.c:339 task_work_run+0x127/0x190 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fa1387aa159 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:00007ffde62d1cc8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fa138a33da0 RCX: 00007fa1387aa159 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fa138a33da0 R08: 0000000000000006 R09: 0000000000000000 R10: 00007fa138a33cb0 R11: 0000000000000246 R12: 000000000000b384 R13: 00007fa138a3245c R14: 000000000000b07e R15: 00007fa138a32450 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 1232 Comm: syz.4.232 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:__sanitizer_cov_trace_pc+0x1/0x60 kernel/kcov.c:199 Code: 00 00 0f 0b 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb e8 13 00 00 00 48 8b 3d 1c 9c 7f 05 48 89 de e8 24 b7 3e 00 5b 5d c3 00 55 <48> 89 e5 48 8b 45 08 65 48 8b 0d c0 b5 98 7e 65 8b 15 c1 b5 98 7e RSP: 0018:ffffc90000cd66d0 EFLAGS: 00000a06 RAX: f3f8f8f8f1f1f1f1 RBX: dffffc0000000000 RCX: ffff888126c68000 RDX: 0000000000000000 RSI: ffffc90000cd69a0 RDI: ffff88811fe7d000 RBP: ffffc90000cd67d0 R08: ffff888125ed1e8b R09: 1ffff11024bda3d1 R10: dffffc0000000000 R11: ffffed1024bda3d2 R12: 1ffff9200019ace4 R13: ffff888125ed1e00 R14: ffffc90000cd69a0 R15: 0000000005b525c7 FS: 00007fa1371e26c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7c1d72ed58 CR3: 0000000136ab1000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: tipc_sk_rcv+0x1a3f/0x2ca0 net/tipc/socket.c:2503 tipc_node_xmit+0x36f/0xd80 net/tipc/node.c:1703 tipc_node_xmit_skb net/tipc/node.c:1768 [inline] tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1783 tipc_sk_rcv+0x1a3f/0x2ca0 net/tipc/socket.c:2503 tipc_node_xmit+0x36f/0xd80 net/tipc/node.c:1703 tipc_sk_push_backlog+0x4d3/0x7b0 net/tipc/socket.c:1316 tipc_sk_conn_proto_rcv net/tipc/socket.c:1370 [inline] tipc_sk_proto_rcv+0x9c3/0x1570 net/tipc/socket.c:2158 tipc_sk_filter_rcv+0x2dde/0x2fd0 net/tipc/socket.c:2354 tipc_sk_enqueue net/tipc/socket.c:2447 [inline] tipc_sk_rcv+0x787/0x2ca0 net/tipc/socket.c:2499 tipc_node_xmit+0x36f/0xd80 net/tipc/node.c:1703 tipc_node_xmit_skb net/tipc/node.c:1768 [inline] tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1783 tipc_sk_backlog_rcv+0x174/0x220 net/tipc/socket.c:2414 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+0x1a85/0x2470 net/core/sock.c:1381 __sys_setsockopt+0x261/0x470 net/socket.c:2199 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2211 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: 0033:0x7fa1387aa159 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:00007fa1371e2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fa138a32090 RCX: 00007fa1387aa159 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000005 RBP: 00007fa138841024 R08: 0000000000000004 R09: 0000000000000000 R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa138a32128 R14: 00007fa138a32090 R15: 00007ffde62d1b68