rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=55c4/1/0x4000000000000000 softirq=26527/26528 fqs=5247
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   966747          1            0
rcu: 	cputime:    27588      24900          142   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=17993 q=26970 ncpus=2)
CPU: 1 UID: 0 PID: 9307 Comm: syz.0.1527 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:queue_work_on+0x1f7/0x270
Code: 4d 85 ff 75 16 e8 19 4a 35 00 eb 15 e8 12 4a 35 00 e8 6d b5 e3 09 4d 85 ff 74 ea e8 03 4a 35 00 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 04 2e 00 00 00 00 66 43 c7 44 2e 09 00 00 43 c6 44 2e 0b 00
RSP: 0018:ffffc900001e0900 EFLAGS: 00000246
RAX: ffffffff818ad3bd RBX: ffffe8ff14635001 RCX: ffff88802339b980
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001e09f0 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff9200003c128 R15: 0000000000000200
FS:  00007f868502e6c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30807ff8 CR3: 000000011c09e000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 wg_packet_send_staged_packets+0x10d0/0x17d0
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 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 5b 22 21 f6 e8 96 f5 57 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:ffffc90002adf7a0 EFLAGS: 00000286
RAX: c5734e8f91b9a700 RBX: 0000000000000000 RCX: c5734e8f91b9a700
RDX: 0000000000000006 RSI: ffffffff8d998727 RDI: 0000000000000001
RBP: ffffc90002adf840 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200055bef4
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:debug_lockdep_rcu_enabled+0x2a/0x40
Code: f3 0f 1e fa 31 c0 83 3d 17 5a 33 04 00 74 1e 83 3d 3a 8a 33 04 00 74 15 65 48 8b 0c 25 08 10 a0 92 31 c0 83 b9 ec 0a 00 00 00 <0f> 94 c0 e9 8e d3 02 00 cc cc cc cc cc cc cc cc cc cc cc cc cc cc
RSP: 0018:ffffc90002adf900 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88802339b980
RDX: ffffc90003fa3000 RSI: 000000000000b2a3 RDI: 000000000000b2a4
RBP: ffff888117a75f58 R08: 0000000000000000 R09: ffffffff825cec6c
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffff88803d30af40
R13: ffff888117a75f38 R14: 000000005a7d156c R15: ffff88802701f580
 kernfs_link_sibling+0xce/0x3e0
 kernfs_add_one+0x1e0/0x520
 __kernfs_create_file+0x22b/0x2e0
 cgroup_addrm_files+0x7f2/0xb20
 css_populate_dir+0x2c4/0x3d0
 cgroup_mkdir+0xc20/0xe60
 kernfs_iop_mkdir+0x211/0x350
 vfs_mkdir+0x306/0x510
 do_mkdirat+0x247/0x590
 __x64_sys_mkdir+0x6c/0x80
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f868418eb69
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:00007f868502e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f86843b5fa0 RCX: 00007f868418eb69
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000000
RBP: 00007f8684211df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f86843b5fa0 R15: 00007fffe6f1dce8
 </TASK>
sched: DL replenish lagged too much
