rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2643 jiffies s: 105449 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 17268 Comm: syz.0.3543 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:cake_heapify+0x57/0x6a0 net/sched/sch_cake.c:-1
Code: 0f 83 fb 05 00 00 44 0f b7 f5 bf 00 20 00 00 44 89 f6 e8 fc 91 21 f9 41 81 fe 00 20 00 00 75 0a e8 0e 8f 21 f9 e9 c8 05 00 00 <49> 8d 44 24 18 49 83 c4 10 48 ba 00 00 00 00 00 fc ff df 4c 89 e1
RSP: 0018:ffffc90004dae720 EFLAGS: 00000283
RAX: ffffffff8860e634 RBX: 0000000000000701 RCX: 0000000000000002
RDX: ffff8880755b1dc0 RSI: 0000000000000701 RDI: 0000000000002000
RBP: 0000000000000701 R08: ffffffff90af93f7 R09: 1ffffffff215f27e
R10: dffffc0000000000 R11: fffffbfff215f27f R12: ffff8880745f02c0
R13: dffffc0000000000 R14: 0000000000000701 R15: 0000000000000701
FS:  00007fc8b43e36c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffb4dc8fec CR3: 00000000588ec000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 cake_drop net/sched/sch_cake.c:1575 [inline]
 cake_enqueue+0x33ea/0x7fc0 net/sched/sch_cake.c:1949
 dev_qdisc_enqueue+0x4c/0x2b0 net/core/dev.c:3900
 __dev_xmit_skb net/core/dev.c:3989 [inline]
 __dev_queue_xmit+0xfdc/0x37c0 net/core/dev.c:4337
 dev_queue_xmit include/linux/netdevice.h:3051 [inline]
 tipc_l2_send_msg+0x30f/0x3d0 net/tipc/bearer.c:518
 tipc_bearer_xmit_skb+0x2a9/0x3f0 net/tipc/bearer.c:577
 tipc_enable_bearer net/tipc/bearer.c:368 [inline]
 __tipc_nl_bearer_enable+0x10cd/0x1460 net/tipc/bearer.c:1049
 __tipc_nl_compat_doit net/tipc/netlink_compat.c:375 [inline]
 tipc_nl_compat_doit+0x3dc/0x610 net/tipc/netlink_compat.c:397
 tipc_nl_compat_handle net/tipc/netlink_compat.c:-1 [inline]
 tipc_nl_compat_recv+0x536/0xaf0 net/tipc/netlink_compat.c:1325
 genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:756
 genl_family_rcv_msg net/netlink/genetlink.c:833 [inline]
 genl_rcv_msg+0x604/0x790 net/netlink/genetlink.c:850
 netlink_rcv_skb+0x1fb/0x450 net/netlink/af_netlink.c:2511
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:861
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x74d/0x8d0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8ad/0xbd0 net/netlink/af_netlink.c:1872
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5be/0x970 net/socket.c:2518
 ___sys_sendmsg+0x2a2/0x360 net/socket.c:2572
 __sys_sendmsg net/socket.c:2601 [inline]
 __do_sys_sendmsg net/socket.c:2610 [inline]
 __se_sys_sendmsg+0x1bb/0x2a0 net/socket.c:2608
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc8b359cdd9
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:00007fc8b43e3028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fc8b3816180 RCX: 00007fc8b359cdd9
RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 0000000000000004
RBP: 00007fc8b3632d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc8b3816218 R14: 00007fc8b3816180 R15: 00007ffca364d3d8
 </TASK>
vkms_vblank_simulate: vblank timer overrun