watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz-executor.0:26779] Modules linked in: CPU: 0 PID: 26779 Comm: syz-executor.0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 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: 21 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 6d 21 d6 03 fb f4 5e ff ff ff fb e9 58 ff ff ff e8 8b f6 7c 03 89 f9 80 e1 07 38 RSP: 0018:ffffc90001b5f900 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff88811a2d9e88 RCX: ffffffff81500549 RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88811a2d9e88 RBP: ffffc90001b5f990 R08: ffff88811a2d9e88 R09: 1ffff1102345b3d1 R10: dffffc0000000000 R11: ffffed102345b3d2 R12: 1ffff1103ee00001 R13: ffff8881f7038ad4 R14: dffffc0000000000 R15: 1ffff9200036bf20 FS: 0000555589c82480(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdd92ce2fd0 CR3: 0000000123d14000 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_release+0xb2/0x1640 net/tipc/socket.c:639 __sock_release net/socket.c:649 [inline] sock_close+0xe0/0x270 net/socket.c:1336 __fput+0x20b/0x8b0 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: 0033:0x7fdd931967de Code: 08 0f 85 55 ed ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 90 41 57 41 56 4d 89 c6 41 55 4d 89 cd 41 54 55 53 48 83 ec 08 RSP: 002b:00007ffeaaa7b468 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000555589c82480 RCX: 00007fdd931967de RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007fdd932b2980 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000019061 R13: ffffffffffffffff R14: 00007fdd92d05000 R15: 0000000000018d20 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 26780 Comm: syz-executor.0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:rht_bucket include/linux/rhashtable.h:289 [inline] RIP: 0010:__rhashtable_lookup include/linux/rhashtable.h:597 [inline] RIP: 0010:rhashtable_lookup include/linux/rhashtable.h:638 [inline] RIP: 0010:tipc_sk_lookup+0x1fc/0x5f0 net/tipc/socket.c:2999 Code: 31 c8 89 ce c1 c6 10 29 f0 31 c2 89 c6 c1 c6 04 29 f2 31 d1 c1 c2 0e 29 d1 31 c8 c1 c1 18 29 c8 ff cb 21 c3 45 8b 65 00 31 ff <44> 89 e6 e8 7c b0 d1 fc 45 85 e4 0f 85 07 02 00 00 e8 be ac d1 fc RSP: 0018:ffffc90001a3e860 EFLAGS: 00000246 RAX: 00000000570911bf RBX: 00000000000000bf RCX: 00000000395bcb1c RDX: 00000000ef5ec7d1 RSI: 00000000bafc0e2c RDI: 0000000000000000 RBP: ffffc90001a3e950 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000347d1c R12: 0000000000000000 R13: ffff88810c1c2004 R14: 00000000f0d07bcf R15: ffff88810dc090de FS: 00007fdd92d046c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdd931b47d0 CR3: 0000000123d14000 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 net/tipc/socket.c:1316 [inline] tipc_sk_filter_connect net/tipc/socket.c:2255 [inline] tipc_sk_filter_rcv+0x154a/0x2cb0 net/tipc/socket.c:2364 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: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: 0033:0x7fdd931733b9 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 d0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdd92d040b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fdd932b0f80 RCX: 00007fdd931733b9 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007fdd931d4498 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020000540 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fdd932b0f80 R15: 00007ffeaaa7b3e8