watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.3.1961:7202]
Modules linked in:
CPU: 0 PID: 7202 Comm: syz.3.1961 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025
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+0xc2/0x120 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 3f 98 98 03 f4 eb 0e 0f 1f 44 00 00 0f 00 2d 30 98 98 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:ffffc900012f76e0 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffff88810d07a388 RCX: ffffffff814b263a
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88810d07a388
RBP: ffffc900012f7790 R08: dffffc0000000000 R09: ffffed1021a0f472
R10: ffffed1021a0f472 R11: 1ffff11021a0f471 R12: 0000000000000246
R13: 1ffff11021a0f471 R14: dffffc0000000000 R15: 1ffff9200025eee0
FS:  00007f493c0446c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002700 CR3: 000000010f626000 CR4: 00000000003506b0
DR0: 0000200000000300 DR1: 0000200000000300 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+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:183 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0xd8/0xe0 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:359 [inline]
 lock_sock_nested+0x92/0x290 net/core/sock.c:3117
 lock_sock include/net/sock.h:1648 [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+0x5a2/0x8c0 net/socket.c:2376
 ___sys_sendmsg+0x1f0/0x260 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+0x1e2/0x2a0 net/socket.c:2466
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f493d5fcba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f493c044038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f493d844090 RCX: 00007f493d5fcba9
RDX: 0000000000000010 RSI: 0000200000000240 RDI: 0000000000000006
RBP: 00007f493d67fe19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f493d844128 R14: 00007f493d844090 R15: 00007ffc497b6a58
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7201 Comm: syz.3.1961 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025
RIP: 0010:_raw_spin_trylock_bh+0x1/0x130 kernel/locking/spinlock.c:142
Code: 80 c1 03 38 c1 0f 8c 66 ff ff ff 48 89 df e8 76 a4 25 fd e9 59 ff ff ff e8 3c db fa ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 83 ec 60 48 89
RSP: 0018:ffffc900037e6830 EFLAGS: 00000286
RAX: ffff88810d07a300 RBX: ffffc900037e6ca0 RCX: ffff8881350e3b40
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88810d07a388
RBP: ffffc900037e6ab0 R08: dffffc0000000000 R09: ffffed1021a0f471
R10: ffffed1021a0f471 R11: 1ffff11021a0f470 R12: dffffc0000000000
R13: ffff88810d07a300 R14: 000000001b286b05 R15: 000000001b286b05
FS:  00007f493c0656c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000042c0 CR3: 000000010f626000 CR4: 00000000003506a0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674
 tipc_node_xmit_skb net/tipc/node.c:1739 [inline]
 tipc_node_distr_xmit+0x292/0x390 net/tipc/node.c:1754
 tipc_sk_rcv+0x19b9/0x1ef0 net/tipc/socket.c:2497
 tipc_node_xmit+0x256/0xcd0 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+0x98d/0x1ac0 net/tipc/socket.c:2156
 tipc_sk_filter_rcv+0x30ac/0x3850 net/tipc/socket.c:2350
 tipc_sk_enqueue net/tipc/socket.c:2442 [inline]
 tipc_sk_rcv+0x7cc/0x1ef0 net/tipc/socket.c:2493
 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674
 tipc_node_xmit_skb net/tipc/node.c:1739 [inline]
 tipc_node_distr_xmit+0x292/0x390 net/tipc/node.c:1754
 tipc_sk_backlog_rcv+0x16f/0x1f0 net/tipc/socket.c:2410
 sk_backlog_rcv include/net/sock.h:1052 [inline]
 __release_sock+0x146/0x360 net/core/sock.c:2583
 release_sock net/core/sock.c:3134 [inline]
 sock_setsockopt+0x125e/0x2350 net/core/sock.c:1257
 __sys_setsockopt+0x265/0x460 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: 0033:0x7f493d5fcba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f493c065038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f493d843fa0 RCX: 00007f493d5fcba9
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000005
RBP: 00007f493d67fe19 R08: 0000000000000004 R09: 0000000000000000
R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f493d844038 R14: 00007f493d843fa0 R15: 00007ffc497b6a58