rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=5ff4/1/0x4000000000000000 softirq=27222/27225 fqs=5236
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     6030          0            0
rcu: 	cputime:      147      52331            4   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=22421 q=2992 ncpus=2)
CPU: 1 UID: 0 PID: 8284 Comm: kworker/u8:37 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events_unbound bpf_map_free_deferred
RIP: 0010:taprio_dequeue_tc_priority+0x26c/0x750 net/sched/sch_taprio.c:798
Code: 85 33 02 00 00 41 8b 5d 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 39 02 00 00 45 8b 36 89 df 44 89 f6 e8 a4 86 50 f8 <44> 39 f3 73 15 48 8b 5c 24 10 48 85 db 0f 85 7a 04 00 00 e8 cc 84
RSP: 0018:ffffc90000a08cd8 EFLAGS: 00000246
RAX: ffffffff897072dc RBX: 0000000000000008 RCX: 0000000000000100
RDX: ffff888056e0db80 RSI: 0000000000000010 RDI: 0000000000000008
RBP: 1ffff1100f8dbc6a R08: ffffffff896fcc56 R09: ffffffff8df41aa0
R10: 0000000000000001 R11: ffffffff89631050 R12: dffffc0000000000
R13: ffff88807c6de354 R14: 0000000000000010 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000010000 CR3: 000000000dd3a000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 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+0x717/0x900 net/core/dev.c:5782
 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x60/0x150 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:kasan_check_range+0x4/0x2c0 mm/kasan/generic.c:199
Code: df 48 c7 c6 ff 71 97 8d e8 e9 06 01 ff 90 0f 0b cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 <55> 41 57 41 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 ba 01 00 00 4c
RSP: 0018:ffffc900046bf960 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffea00012bbc80 RCX: ffffffff8218e63c
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea00012bbcb4
RBP: ffffea00012bbc88 R08: ffffea00012bbcb3 R09: 1ffffd4000257796
R10: dffffc0000000000 R11: fffff94000257797 R12: ffffea00012bbcb0
R13: 00000e000014e123 R14: ffffea00012bbcb4 R15: 0000000000000000
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 page_ref_count include/linux/page_ref.h:67 [inline]
 page_expected_state mm/page_alloc.c:1051 [inline]
 free_page_is_bad mm/page_alloc.c:1090 [inline]
 free_pages_prepare mm/page_alloc.c:1398 [inline]
 __free_frozen_pages+0xaec/0xd30 mm/page_alloc.c:2943
 vfree+0x25a/0x400 mm/vmalloc.c:3466
 bpf_map_free+0x19b/0x3f0 kernel/bpf/syscall.c:894
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
sched: DL replenish lagged too much