watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.2.9957:7066]
Modules linked in:
CPU: 1 PID: 7066 Comm: syz.2.9957 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
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 43 1c b8 03 f4 eb 0e 0f 1f 44 00 00 0f 00 2d 34 1c 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:ffffc9000113f6e0 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffff88814c376388 RCX: ffffffff814bea54
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88814c376388
RBP: ffffc9000113f790 R08: ffff88814c376388 R09: 1ffff1102986ec71
R10: dffffc0000000000 R11: ffffed102986ec72 R12: 0000000000000246
R13: 0b7174ceadeef5d8 R14: dffffc0000000000 R15: 1ffff92000227ee0
FS:  00007fd30c7306c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd30c6edff8 CR3: 000000012050f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
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+0x72d/0xb80 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:3124
 lock_sock include/net/sock.h:1697 [inline]
 tipc_sendstream+0x47/0x70 net/tipc/socket.c:1544
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 ____sys_sendmsg+0x5be/0x8f0 net/socket.c:2377
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2431
 __sys_sendmsg net/socket.c:2460 [inline]
 __do_sys_sendmsg net/socket.c:2469 [inline]
 __se_sys_sendmsg net/socket.c:2467 [inline]
 __x64_sys_sendmsg+0x201/0x2d0 net/socket.c:2467
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fd30dcf9559
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:00007fd30c730028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd30df80090 RCX: 00007fd30dcf9559
RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 000000000000007d
RBP: 00007fd30dd90b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd30df80128 R14: 00007fd30df80090 R15: 00007ffec7777b78
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7067 Comm: syz.2.9957 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:preempt_count_sub+0xf4/0x170 kernel/sched/core.c:4488
Code: d9 7e 05 00 75 96 48 c7 c7 80 14 e8 84 48 c7 c6 60 15 e8 84 e8 0d 19 35 03 0f 0b e9 7c ff ff ff 48 c7 c1 c0 18 e8 86 80 e1 07 <80> c1 03 38 c1 0f 8c 29 ff ff ff 41 89 fe 48 c7 c7 c0 18 e8 86 e8
RSP: 0018:ffffc90001186818 EFLAGS: 00000246
RAX: 0000000000000004 RBX: dffffc0000000000 RCX: ffffffff86e81800
RDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000001
RBP: ffffc90001186828 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000230cfc R12: ffffc90001186ca0
R13: ffff88814c376301 R14: 00000000e220e7c9 R15: 00000000e220e7c9
FS:  00007fd30c70f6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd30c6eed58 CR3: 000000012050f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 __local_bh_enable_ip+0x53/0x80 kernel/softirq.c:197
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
 _raw_spin_unlock_bh+0x51/0x60 kernel/locking/spinlock.c:207
 spin_unlock_bh include/linux/spinlock.h:400 [inline]
 tipc_skb_peek_port net/tipc/msg.h:1258 [inline]
 tipc_sk_rcv+0x33d/0x1df0 net/tipc/socket.c:2493
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679
 tipc_node_xmit_skb net/tipc/node.c:1744 [inline]
 tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1759
 tipc_sk_rcv+0x1913/0x1df0 net/tipc/socket.c:2503
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679
 tipc_sk_push_backlog+0x4d3/0x7b0 net/tipc/socket.c:1307
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1362 [inline]
 tipc_sk_proto_rcv+0xa32/0x1b60 net/tipc/socket.c:2160
 tipc_sk_filter_rcv+0x30bc/0x3860 net/tipc/socket.c:2356
 tipc_sk_enqueue net/tipc/socket.c:2448 [inline]
 tipc_sk_rcv+0x745/0x1df0 net/tipc/socket.c:2499
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679
 tipc_node_xmit_skb net/tipc/node.c:1744 [inline]
 tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1759
 tipc_sk_backlog_rcv+0x174/0x220 net/tipc/socket.c:2416
 sk_backlog_rcv include/net/sock.h:1071 [inline]
 __release_sock+0x146/0x360 net/core/sock.c:2588
 release_sock net/core/sock.c:3141 [inline]
 sock_setsockopt+0x1801/0x2620 net/core/sock.c:1256
 __sys_setsockopt+0x272/0x480 net/socket.c:2143
 __do_sys_setsockopt net/socket.c:2158 [inline]
 __se_sys_setsockopt net/socket.c:2155 [inline]
 __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2155
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fd30dcf9559
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:00007fd30c70f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fd30df80180 RCX: 00007fd30dcf9559
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 000000000000007c
RBP: 00007fd30dd90b20 R08: 0000000000000004 R09: 0000000000000000
R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd30df80218 R14: 00007fd30df80180 R15: 00007ffec7777b78