watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.1.1063:3665]
Modules linked in:
CPU: 1 PID: 3665 Comm: syz.1.1063 Not tainted 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:ffffc9000364f6e0 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffff88810fc2ca88 RCX: ffffffff814bed9a
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88810fc2ca88
RBP: ffffc9000364f790 R08: ffff88810fc2ca88 R09: 1ffff11021f85951
R10: dffffc0000000000 R11: ffffed1021f85952 R12: 0000000000000246
R13: 1ffff11021f85951 R14: dffffc0000000000 R15: 1ffff920006c9ee0
FS:  00007fb4944056c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb494404ff8 CR3: 0000000118076000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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: 0033:0x7fb4949bf8f9
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:00007fb494405028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fb494bed080 RCX: 00007fb4949bf8f9
RDX: 0000000000000000 RSI: 0000200000000200 RDI: 0000000000000004
RBP: 00007fb494a518ac R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fb494bed080 R15: 00007ffea5b3cad8
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3660 Comm: syz.1.1063 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:_raw_spin_lock_bh+0x54/0xf0 kernel/locking/spinlock.c:174
Code: c7 04 24 b3 8a b5 41 48 c7 44 24 08 b2 29 ba 85 48 c7 44 24 10 a0 a2 82 84 49 89 e7 49 c1 ef 03 48 b8 f1 f1 f1 f1 f8 f3 f3 f3 <49> bc 00 00 00 00 00 fc ff df 4b 89 04 27 bf 01 02 00 00 e8 44 2d
RSP: 0018:ffffc9000368e780 EFLAGS: 00000a06
RAX: f3f3f3f8f1f1f1f1 RBX: ffffc9000368ec94 RCX: ffff88812ccd8000
RDX: 0000000000000000 RSI: 0000000000000005 RDI: ffffc9000368ec94
RBP: ffffc9000368e810 R08: ffff88810fc2ca83 R09: 1ffff11021f85950
R10: dffffc0000000000 R11: ffffed1021f85951 R12: ffffc9000368ec80
R13: ffff88810fc2ca80 R14: ffffc9000368e7a0 R15: 1ffff920006d1cf0
FS:  00007fb4944266c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b6a21aff8 CR3: 0000000118076000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 spin_lock_bh include/linux/spinlock.h:360 [inline]
 tipc_skb_peek_port net/tipc/msg.h:1248 [inline]
 tipc_sk_rcv+0x230/0x1dc0 net/tipc/socket.c:2487
 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: 0033:0x7fb4949bf8f9
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:00007fb494426028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fb494becfa0 RCX: 00007fb4949bf8f9
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007fb494a518ac R08: 0000000000000004 R09: 0000000000000000
R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb494becfa0 R15: 00007ffea5b3cad8