rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10495 ticks this GP) idle=51bc/1/0x4000000000000000 softirq=16591/16591 fqs=5248
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   975005          1            0
rcu: 	cputime:    25900      26599           92   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=8169 q=3484 ncpus=2)
CPU: 1 UID: 0 PID: 6291 Comm: syz.1.150 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:ffffc900001e0c20 EFLAGS: 00000206
RAX: 1f9854581abf0f00 RBX: 0000000000000a06 RCX: 1f9854581abf0f00
RDX: 0000000000000002 RSI: ffffffff8d998836 RDI: 0000000000000001
RBP: ffffc900001e0ca0 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: dffffc0000000000
R13: 1ffff110054b0500 R14: ffff8880315b1648 R15: 1ffff9200003c184
FS:  00007f71460cc6c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f71460cbfc8 CR3: 00000000308f4000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 skb_dequeue+0x10e/0x150
 ieee80211_handle_queued_frames+0x4a/0x1f0
 tasklet_action_common+0x36c/0x580
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:inode_to_bdi+0x4/0xf0
Code: ff 4c 89 f7 be 03 00 00 00 5b 41 5e 41 5f 5d e9 c2 1c be 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <41> 57 41 56 53 48 89 fb e8 ff e5 bc ff 48 85 db 74 72 49 bf 00 00
RSP: 0018:ffffc90006bc7758 EFLAGS: 00000293
RAX: ffffffff824165ad RBX: ffff88802272bcc8 RCX: ffff88801f4c0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88802272bc48
RBP: 0000000000000008 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000d78ee8 R12: 0000000000000000
R13: 1ffff110044e57a3 R14: ffff88802272bc48 R15: 0000000000000000
 __inode_attach_wb+0x25/0x5c0
 __mark_inode_dirty+0x44d/0xdf0
 touch_atime+0x59b/0x6d0
 pick_link+0xa71/0xe80
 step_into+0xc5d/0xf30
 link_path_walk+0x77b/0xea0
 __filename_parentat+0x246/0x670
 filename_create+0xcf/0x470
 do_mkdirat+0xa0/0x590
 __x64_sys_mkdir+0x6c/0x80
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f714518e9a9
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:00007f71460cc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f71453b5fa0 RCX: 00007f714518e9a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000000
RBP: 00007f7145210d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f71453b5fa0 R15: 00007ffc66331588
 </TASK>
sched: DL replenish lagged too much
