rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10500 ticks this GP) idle=5eb4/1/0x4000000000000000 softirq=38648/38652 fqs=5247
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1046587          0            0
rcu: 	cputime:    25296      27202           88   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=31153 q=2094 ncpus=2)
CPU: 1 UID: 0 PID: 10802 Comm: syz.3.1426 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e #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+0xa8/0x110
Code: 74 05 e8 cb 9e 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> 13 cd 1f f6 65 8b 05 bc f9 2e 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900001e0da0 EFLAGS: 00000206
RAX: 0e8ee5291e254300 RBX: 0000000000000a06 RCX: 0e8ee5291e254300
RDX: 0000000000000003 RSI: ffffffff8d998836 RDI: 0000000000000001
RBP: ffffc900001e0e30 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: dffffc0000000000
R13: 0000000000000001 R14: ffff888136627ac0 R15: 1ffff9200003c1b4
FS:  00007f3d498986c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 000000010e516000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_irq_work+0xa3/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20
RIP: 0010:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 8b 2d 21 f6 e8 c6 00 58 f6 fb bf 01 00 00 00 <e8> 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc90003d778c0 EFLAGS: 00000282
RAX: 0e8ee5291e254300 RBX: 0000000000000000 RCX: 0e8ee5291e254300
RDX: 0000000000000007 RSI: ffffffff8d998836 RDI: 0000000000000001
RBP: ffffc90003d77960 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920007aef18
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:cgroup_attach_permissions+0x1e5/0x9e0
Code: 8b 3c 24 e8 8d 76 6a 00 e9 54 ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 66 ff ff ff 48 89 df e8 70 76 6a 00 e9 59 ff ff ff <48> c7 c0 30 1a a2 8f 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 0a 07
RSP: 0018:ffffc90003d77a20 EFLAGS: 00000246
RAX: 1ffff110201d9af0 RBX: ffff888100ecd780 RCX: ffff888100ecd778
RDX: ffff888107eb1cc0 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffffff8e176e40 R08: ffff888114357400 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 1ffff110201d9a25
R13: 0000000000000002 R14: ffff8880253b5000 R15: dffffc0000000000
 __cgroup_procs_write+0x238/0x300
 cgroup_threads_write+0x24/0x50
 cgroup_file_write+0x39e/0x740
 kernfs_fop_write_iter+0x378/0x4f0
 vfs_write+0x54b/0xa90
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3d4898e9a9
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:00007f3d49898038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3d48bb5fa0 RCX: 00007f3d4898e9a9
RDX: 0000000000000012 RSI: 0000200000000040 RDI: 000000000000000b
RBP: 00007f3d48a10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3d48bb5fa0 R15: 00007fff1dadc498
 </TASK>
sched: DL replenish lagged too much
