rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10482 ticks this GP) idle=710c/1/0x4000000000000000 softirq=13962/16816 fqs=5248
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   859071       3295            0
rcu: 	cputime:    27732      24727          133   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=6985 q=3360 ncpus=2)
CPU: 1 UID: 0 PID: 5951 Comm: syz.1.23 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e-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:handle_softirqs+0x1b0/0x870
Code: 89 64 24 30 0f b7 db 48 c7 c7 00 ad 89 8b e8 a7 ee e8 09 65 66 c7 05 85 5b 1a 11 00 00 e8 58 00 42 00 fb 49 c7 c7 c0 c0 e0 8d <b8> ff ff ff ff 0f bc c3 41 89 c5 41 ff c5 0f 84 c2 03 00 00 89 5c
RSP: 0018:ffffc900001e0e40 EFLAGS: 00000286
RAX: c8cb70c25c68fc00 RBX: 0000000000000200 RCX: c8cb70c25c68fc00
RDX: 0000000000000003 RSI: ffffffff8d99883e RDI: ffffffff8be29f40
RBP: ffffc900001e0f50 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 000000000000000a
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8de0c0c0
FS:  00007feab20526c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000001 CR3: 0000000108b30000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __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:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 0f 1a df 09 e8 ba b9 35 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc9000359f298 EFLAGS: 00000282
RAX: c8cb70c25c68fc00 RBX: 0000000000000000 RCX: c8cb70c25c68fc00
RDX: 0000000000000007 RSI: ffffffff8d99883e RDI: ffffffff8be29f40
RBP: ffffc9000359f2f0 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffff888022380000
R13: dffffc0000000000 R14: ffff88802101d640 R15: ffff88813663ab98
 __schedule+0x16fd/0x4d00
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire+0x175/0x360
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 9b d3 01 11 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc9000359f688 EFLAGS: 00000206
RAX: c8cb70c25c68fc00 RBX: 0000000000000000 RCX: c8cb70c25c68fc00
RDX: ffffffff9349ed90 RSI: ffffffff8db8655b RDI: ffffffff8be29f40
RBP: ffffffff82235dc7 R08: 0000000000000004 R09: ffffffff95c041f0
R10: 00000000b51d7e8b R11: 00000000132e3413 R12: 0000000000000002
R13: ffffffff8e25e848 R14: 0000000000000001 R15: 0000000000000246
 srcu_read_lock+0x46/0x60
 kasan_quarantine_reduce+0x4c/0x160
 __kasan_slab_alloc+0x22/0x80
 __kmalloc_node_track_caller_noprof+0x216/0x4e0
 kstrdup+0x42/0x100
 __kernfs_new_node+0x9c/0x7e0
 kernfs_new_node+0x102/0x210
 __kernfs_create_file+0x4b/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_mkdirat+0x87/0xa0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feab118e9a9
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:00007feab2052038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007feab13b6080 RCX: 00007feab118e9a9
RDX: 00000000000001ff RSI: 0000200000000000 RDI: ffffffffffffff9c
RBP: 00007feab1210d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007feab13b6080 R15: 00007ffc071d6a98
 </TASK>
sched: DL replenish lagged too much
