watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz-executor.0:4915] Modules linked in: CPU: 0 PID: 4915 Comm: syz-executor.0 Not tainted 6.1.141-syzkaller-1169944-gfa7e0538663e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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+0xf2/0x140 arch/x86/kernel/kvm.c:1064 Code: ae 13 04 f4 eb 9a 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 90 ae 13 04 fb f4 71 ff ff ff fb e9 6b ff ff ff e8 1e 0f b5 03 89 f9 80 e1 07 38 RSP: 0018:ffffc900036478a0 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff88810ba6ad98 RCX: ffffffff84f06582 RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff88810ba6ad98 RBP: ffffc90003647930 R08: dffffc0000000000 R09: ffffed102174d5b4 R10: ffffed102174d5b4 R11: 1ffff1102174d5b3 R12: 1ffff1103ee00001 R13: ffff8881f7038c94 R14: dffffc0000000000 R15: 1ffff920006c8f14 FS: 0000555560656480(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcf5ce38d58 CR3: 000000010c006000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:603 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x690/0xc40 kernel/locking/qspinlock.c:511 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline] _raw_spin_lock_bh+0xd8/0xe0 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] lock_sock_nested+0x92/0x280 net/core/sock.c:3507 lock_sock include/net/sock.h:1769 [inline] tipc_release+0xb2/0x1650 net/tipc/socket.c:639 __sock_release net/socket.c:652 [inline] sock_close+0xf1/0x290 net/socket.c:1390 __fput+0x1fc/0x8f0 fs/file_table.c:320 ____fput+0x15/0x20 fs/file_table.c:348 task_work_run+0x1db/0x240 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x9b/0xb0 kernel/entry/common.c:177 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fcf5c07cc9a Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24 RSP: 002b:00007ffcd3d8b740 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007fcf5c07cc9a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007fcf5c1ad980 R08: 0000001b30760000 R09: 000e9d053d365454 R10: 0000003f250fa7ad R11: 0000000000000293 R12: 000000000001d9a4 R13: ffffffffffffffff R14: 00007fcf5bc00000 R15: 000000000001d663 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4916 Comm: syz-executor.0 Not tainted 6.1.141-syzkaller-1169944-gfa7e0538663e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:preempt_count_add+0xdb/0x1b0 kernel/sched/core.c:5903 Code: 58 08 65 4c 8b 35 95 d8 b6 7e 49 81 c6 c8 0a 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 e8 bc 68 00 49 89 1e <5b> 41 5e 41 5f 5d c3 89 fb e8 07 b9 14 01 89 df 85 c0 74 85 48 c7 RSP: 0018:ffffc900035f6818 EFLAGS: 00000202 RAX: 0000000000000402 RBX: ffffc900035f6d74 RCX: ffffffff8796c003 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000201 RBP: ffffc900035f6830 R08: dffffc0000000000 R09: ffffed102174d5b1 R10: ffffed102174d5b1 R11: 1ffff1102174d5b0 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffffc900035f6860 R15: dffffc0000000000 FS: 00007fcf5ce596c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556065f818 CR3: 000000010c006000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __local_bh_disable_ip include/linux/bottom_half.h:13 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:125 [inline] _raw_spin_lock_bh+0x6c/0xe0 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] tipc_skb_peek_port net/tipc/msg.h:1225 [inline] tipc_sk_rcv+0x25c/0x2cc0 net/tipc/socket.c:2491 tipc_node_xmit+0x257/0xd00 net/tipc/node.c:1703 tipc_node_xmit_skb net/tipc/node.c:1768 [inline] tipc_node_distr_xmit+0x292/0x390 net/tipc/node.c:1783 tipc_sk_rcv+0x1aa3/0x2cc0 net/tipc/socket.c:2501 tipc_node_xmit+0x257/0xd00 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+0x155f/0x2c80 net/tipc/socket.c:2364 tipc_sk_enqueue net/tipc/socket.c:2445 [inline] tipc_sk_rcv+0x7d9/0x2cc0 net/tipc/socket.c:2497 tipc_node_xmit+0x257/0xd00 net/tipc/node.c:1703 tipc_node_xmit_skb net/tipc/node.c:1768 [inline] tipc_node_distr_xmit+0x292/0x390 net/tipc/node.c:1783 tipc_sk_backlog_rcv+0x16f/0x1f0 net/tipc/socket.c:2412 sk_backlog_rcv include/net/sock.h:1131 [inline] __release_sock+0x154/0x380 net/core/sock.c:2945 release_sock net/core/sock.c:3519 [inline] sockopt_release_sock+0x95/0x1f0 net/core/sock.c:1067 sk_setsockopt+0x1355/0x2590 net/core/sock.c:-1 sock_setsockopt+0x5a/0x70 net/core/sock.c:1552 __sys_setsockopt+0x270/0x4e0 net/socket.c:2274 __do_sys_setsockopt net/socket.c:2289 [inline] __se_sys_setsockopt net/socket.c:2286 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2286 x64_sys_call+0x124/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:55 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fcf5c07dda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcf5ce590c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fcf5c1abf80 RCX: 00007fcf5c07dda9 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007fcf5c0ca47a R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020000540 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fcf5c1abf80 R15: 00007ffcd3d8b678