rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=d724/1/0x4000000000000000 softirq=15530/15531 fqs=4997
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1005664          0            0
rcu: 	cputime:    24968      27511           92   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=7549 q=2322 ncpus=2)
CPU: 1 UID: 0 PID: 6003 Comm: syz.1.28 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 9b 93 56 f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> e3 c1 1f f6 65 8b 05 bc f9 2e 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900001e0a00 EFLAGS: 00000206
RAX: d9f806c46490d400 RBX: 0000000000000a02 RCX: d9f806c46490d400
RDX: 0000000000000002 RSI: ffffffff8d9987c6 RDI: 0000000000000001
RBP: ffffc900001e0a80 R08: ffffffff8fa1eaf7 R09: 1ffffffff1f43d5e
R10: dffffc0000000000 R11: fffffbfff1f43d5f R12: dffffc0000000000
R13: ffff888108015da0 R14: ffffffff99ce30e8 R15: 1ffff9200003c140
FS:  00007fc45ac9a6c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffccae560d8 CR3: 0000000024f64000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __debug_check_no_obj_freed lib/debugobjects.c:1108 [inline]
 debug_check_no_obj_freed+0x451/0x470 lib/debugobjects.c:1129
 slab_free_hook mm/slub.c:2312 [inline]
 slab_free mm/slub.c:4643 [inline]
 kfree+0x112/0x440 mm/slub.c:4842
 slab_free_after_rcu_debug+0x60/0x2a0 mm/slub.c:4680
 rcu_do_batch kernel/rcu/tree.c:2576 [inline]
 rcu_core+0xca8/0x1710 kernel/rcu/tree.c:2832
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__preempt_count_sub arch/x86/include/asm/preempt.h:85 [inline]
RIP: 0010:preempt_schedule_common+0x8a/0xd0 kernel/sched/core.c:6968
Code: 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 ba 92 b3 f6 49 89 1e bf 01 00 00 00 e8 4d ad ff ff 65 8b 05 06 5e 30 07 <65> ff 0d ff 5d 30 07 65 48 8b 1c 25 08 10 a0 92 48 89 d8 48 c1 e8
RSP: 0018:ffffc9000253f9a0 EFLAGS: 00000246
RAX: 0000000080000001 RBX: ffffffff8b6fb17e RCX: d9f806c46490d400
RDX: 0000000000000000 RSI: ffffffff8be29f60 RDI: ffffffff8be29f20
RBP: ffffc9000253fa38 R08: ffffffff8fa1eaf7 R09: 1ffffffff1f43d5e
R10: dffffc0000000000 R11: fffffbfff1f43d5f R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8881079f31a0 R15: dffffc0000000000
 preempt_schedule+0xae/0xc0 kernel/sched/core.c:6990
 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
 smp_call_function_single+0x470/0x590 kernel/smp.c:681
 task_function_call kernel/events/core.c:121 [inline]
 perf_install_in_context+0x593/0x8f0 kernel/events/core.c:3101
 __do_sys_perf_event_open kernel/events/core.c:13691 [inline]
 __se_sys_perf_event_open+0x193a/0x1d70 kernel/events/core.c:13333
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc459d8e9a9
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:00007fc45ac9a038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fc459fb5fa0 RCX: 00007fc459d8e9a9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0
RBP: 00007fc459e10d69 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc459fb5fa0 R15: 00007ffc2f1dfaf8
 </TASK>
sched: DL replenish lagged too much
