rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=59dc/1/0x4000000000000000 softirq=57741/57742 fqs=5246
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     6042          0            0
rcu: 	cputime:      140      52358            5   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=45925 q=5395 ncpus=2)
CPU: 0 UID: 0 PID: 5838 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:taprio_dequeue_from_txq+0x174/0x980 net/sched/sch_taprio.c:727
Code: 83 c7 38 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 48 8b 6c 24 28 74 08 4c 89 ff e8 f8 ee b5 f8 4d 8b 1f 48 89 df 2e 2e 2e 41 ff d3 <48> 85 c0 0f 84 0c 03 00 00 49 89 c7 4c 89 e3 4c 8d a0 90 00 00 00
RSP: 0018:ffffc90000007ad8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff888078c8f800 RCX: dffffc0000000000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff888078c8f800
RBP: ffff888079edb000 R08: ffffffff897172b6 R09: ffffffff8df41a20
R10: 0000000000000001 R11: ffffffff8964b5e0 R12: dffffc0000000000
R13: ffff8880328e4000 R14: ffff888078c8f800 R15: ffffffff8f82a838
FS:  000055556702c500(0000) GS:ffff888125e35000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fae1b9b42f8 CR3: 00000000640a6000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 taprio_dequeue_tc_priority+0x1ac/0x750 net/sched/sch_taprio.c:793
 taprio_dequeue+0x186/0x550 net/sched/sch_taprio.c:-1
 dequeue_skb net/sched/sch_generic.c:297 [inline]
 qdisc_restart net/sched/sch_generic.c:402 [inline]
 __qdisc_run+0x23f/0x1510 net/sched/sch_generic.c:420
 qdisc_run+0xc7/0x300 include/net/pkt_sched.h:120
 net_tx_action+0x7ac/0x9f0 net/core/dev.c:5781
 handle_softirqs+0x27d/0x850 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:rcu_lockdep_current_cpu_online+0x25/0x120 kernel/rcu/tree.c:4025
Code: 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 8b 0d 90 cc d6 10 b0 01 f7 c1 00 00 f0 00 0f 85 d5 00 00 00 83 3d d3 3d da 0d 00 <0f> 84 c8 00 00 00 65 ff 05 6e cc d6 10 e8 59 fa b3 09 89 c3 83 f8
RSP: 0018:ffffc90003fdfc40 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000080000000
RDX: ffff88802e7e3d00 RSI: ffffffff8bc08340 RDI: ffffffff8bc08300
RBP: ffffc90003fdfcf0 R08: ffffffff81b986b6 R09: ffffffff8df41a20
R10: dffffc0000000000 R11: ffffed1006596385 R12: 1ffff11005cfca13
R13: ffff888030b66800 R14: 1ffff920007fbf8c R15: dffffc0000000000
 rcu_read_lock_held_common kernel/rcu/update.c:113 [inline]
 rcu_read_lock_sched_held+0x74/0x100 kernel/rcu/update.c:124
 task_css_set include/linux/cgroup.h:447 [inline]
 cgroup_sk_alloc+0x166/0x3c0 kernel/cgroup/cgroup.c:7337
 sk_alloc+0x25b/0x390 net/core/sock.c:2330
 inet_create+0x7a0/0x1000 net/ipv4/af_inet.c:328
 __sock_create+0x4b3/0x9d0 net/socket.c:1605
 sock_create net/socket.c:1663 [inline]
 __sys_socket_create net/socket.c:1700 [inline]
 __sys_socket+0xd7/0x1b0 net/socket.c:1747
 __do_sys_socket net/socket.c:1761 [inline]
 __se_sys_socket net/socket.c:1759 [inline]
 __x64_sys_socket+0x7a/0x90 net/socket.c:1759
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fae1b791667
Code: f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 29 00 00 00 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:00007ffe1dd0d268 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fae1b791667
RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 00007ffe1dd0d99c R08: 00007ffe1dd0d2bc R09: 00007ffe1dd0d6a7
R10: 00007ffe1dd0d310 R11: 0000000000000202 R12: 00007fae1b9b7e60
R13: 00000000000927c0 R14: 0000000000065180 R15: 00007fae1b9ba020
 </TASK>
sched: DL replenish lagged too much