rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=c99c/1/0x4000000000000000 softirq=14693/14694 fqs=5237
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1041954          0            0
rcu: 	cputime:    25977      26512           96   ==> 52500(ms)
rcu: 	(t=10501 jiffies g=7625 q=5389 ncpus=2)
CPU: 1 UID: 0 PID: 6072 Comm: syz.0.57 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:stack_trace_consume_entry+0x112/0x280
Code: 4c 89 f8 48 c1 e8 03 80 3c 10 00 74 1a 4c 89 ff 48 89 f3 49 89 d4 4c 89 c5 e8 ca 4b 76 00 49 89 e8 4c 89 e2 48 89 de 49 89 37 <41> 8b 18 41 0f b6 44 15 00 84 c0 0f 85 34 01 00 00 41 3b 1e 0f 92
RSP: 0018:ffffc900001e0598 EFLAGS: 00000246
RAX: 1ffff9200003c105 RBX: ffffc900001e0720 RCX: f2850295fd0e4b00
RDX: dffffc0000000000 RSI: ffffffff823787dc RDI: ffffc900001e06a0
RBP: 1ffff9200003c0d6 R08: ffffc900001e06b0 R09: 0000000000000021
R10: dffffc0000000000 R11: ffffffff81ad0050 R12: 0000000000000000
R13: 1ffff9200003c0d5 R14: ffffc900001e06a8 R15: ffffc900001e0828
FS:  00007f01ef50e6c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557b939588 CR3: 0000000107d76000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x110/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 __alloc_skb+0x112/0x2d0
 ndisc_alloc_skb+0x9f/0x480
 ndisc_send_rs+0x2b5/0x630
 addrconf_rs_timer+0x369/0x670
 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 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:ffffc90004a0f1e0 EFLAGS: 00000282
RAX: f2850295fd0e4b00 RBX: 0000000000000000 RCX: f2850295fd0e4b00
RDX: 0000000000000006 RSI: ffffffff8d998836 RDI: 0000000000000001
RBP: ffffc90004a0f290 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000941e3c
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0x19ae/0x2390
Code: c7 e0 44 88 8b be 66 03 00 00 48 c7 c2 80 45 88 8b e8 76 a2 2b 00 48 c7 c7 e0 f0 13 8e 4c 89 fe e8 57 88 2b 00 e8 72 1e 35 00 <89> d8 48 81 c4 98 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 9a 9f
RSP: 0018:ffffc90004a0f358 EFLAGS: 00000287
RAX: 0000000000000000 RBX: ffffffff903ebf01 RCX: f2850295fd0e4b00
RDX: 0000000000000003 RSI: ffffffff8db86553 RDI: ffff888026000000
RBP: dffffc0000000000 R08: ffffc90004a0f7b8 R09: 0000000000000000
R10: ffffc90004a0f478 R11: fffff52000941e91 R12: ffffc90004a0f7c8
R13: ffffc90004a08000 R14: ffffc90004a0f428 R15: ffffffff8172aae5
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 __kernfs_new_node+0xd7/0x7e0
 kernfs_new_node+0x102/0x210
 __kernfs_create_file+0x4b/0x2e0
 cgroup_addrm_files+0x7f2/0xb20
 css_populate_dir+0x396/0x3d0
 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: 0033:0x7f01ee78e9a9
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:00007f01ef50e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f01ee9b5fa0 RCX: 00007f01ee78e9a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000000
RBP: 00007f01ee810d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f01ee9b5fa0 R15: 00007ffda02af368
 </TASK>
sched: DL replenish lagged too much
