rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=d0c4/1/0x4000000000000000 softirq=24777/24778 fqs=5246
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:        3          0            0
rcu: 	cputime:      153      52336            3   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=23029 q=2428 ncpus=2)
CPU: 0 UID: 0 PID: 5826 Comm: syz-executor Not tainted 6.13.0-rc1-syzkaller-00197-gb4906787d49b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:taprio_dequeue_from_txq+0x8e/0x930 net/sched/sch_taprio.c:706
Code: 48 c1 e8 03 80 3c 10 00 74 12 48 89 df e8 4a d8 34 f8 48 ba 00 00 00 00 00 fc ff df 4c 8b 3b 48 89 e8 48 c1 e8 03 80 3c 10 00 <74> 12 48 89 ef e8 28 d8 34 f8 48 ba 00 00 00 00 00 fc ff df 49 63
RSP: 0018:ffffc90000007418 EFLAGS: 00000246
RAX: 1ffff1100fe29858 RBX: ffff8880629b8000 RCX: ffff88802bef0000
RDX: dffffc0000000000 RSI: 0000000000000009 RDI: ffff88807f14c000
RBP: ffff88807f14c2c0 R08: ffffffff89d57bee R09: 1ffffffff2857110
R10: dffffc0000000000 R11: ffffffff89c77240 R12: 0000000000000009
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff88806298c000
FS:  000055556893c500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2411f8 CR3: 00000000666c8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 taprio_dequeue_tc_priority+0x1b5/0x7a0 net/sched/sch_taprio.c:787
 taprio_dequeue+0x186/0x550
 dequeue_skb net/sched/sch_generic.c:293 [inline]
 qdisc_restart net/sched/sch_generic.c:398 [inline]
 __qdisc_run+0x272/0x2180 net/sched/sch_generic.c:416
 __dev_xmit_skb net/core/dev.c:3896 [inline]
 __dev_queue_xmit+0x10dd/0x3f50 net/core/dev.c:4400
 dev_queue_xmit include/linux/netdevice.h:3168 [inline]
 tipc_l2_send_msg+0x321/0x3f0 net/tipc/bearer.c:516
 tipc_bearer_xmit_skb+0x2f5/0x460 net/tipc/bearer.c:575
 tipc_disc_timeout+0x5ee/0x760 net/tipc/discover.c:338
 call_timer_fn+0x187/0x650 kernel/time/timer.c:1793
 expire_timers kernel/time/timer.c:1844 [inline]
 __run_timers kernel/time/timer.c:2418 [inline]
 __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430
 run_timer_base kernel/time/timer.c:2439 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449
 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:655
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5853
Code: 2b 00 74 08 4c 89 f7 e8 5a ac 8f 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90003fbf040 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920007f7e14 RCX: ffff88802bef0ad8
RDX: dffffc0000000000 RSI: ffffffff8c0aa880 RDI: ffffffff8c5f63e0
RBP: ffffc90003fbf198 R08: ffffffff942b8887 R09: 1ffffffff2857110
R10: dffffc0000000000 R11: fffffbfff2857111 R12: 1ffff920007f7e10
R13: dffffc0000000000 R14: ffffc90003fbf0a0 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 page_ext_get+0x3d/0x2a0 mm/page_ext.c:525
 page_table_check_set+0x4f/0x540 mm/page_table_check.c:114
 __page_table_check_ptes_set+0x30f/0x410 mm/page_table_check.c:225
 page_table_check_ptes_set include/linux/page_table_check.h:74 [inline]
 set_ptes include/linux/pgtable.h:288 [inline]
 __copy_present_ptes mm/memory.c:967 [inline]
 copy_present_ptes mm/memory.c:1050 [inline]
 copy_pte_range mm/memory.c:1173 [inline]
 copy_pmd_range+0x457c/0x7eb0 mm/memory.c:1261
 copy_pud_range mm/memory.c:1298 [inline]
 copy_p4d_range mm/memory.c:1322 [inline]
 copy_page_range+0x99f/0xe90 mm/memory.c:1420
 dup_mmap kernel/fork.c:751 [inline]
 dup_mm kernel/fork.c:1695 [inline]
 copy_mm+0x11c7/0x1f90 kernel/fork.c:1744
 copy_process+0x1845/0x3d50 kernel/fork.c:2395
 kernel_clone+0x226/0x8e0 kernel/fork.c:2807
 __do_sys_clone kernel/fork.c:2950 [inline]
 __se_sys_clone kernel/fork.c:2934 [inline]
 __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2934
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1710176753
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffc1a0466b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1710176753
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 000055556893c7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000030eb6 R14: 0000000000030e8b R15: 00007ffc1a046840
 </TASK>
sched: DL replenish lagged too much