rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10498 ticks this GP) idle=c994/1/0x4000000000000000 softirq=20529/20774 fqs=5206
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1216916        756            0
rcu: 	cputime:    33702      18774           44   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=12261 q=9238 ncpus=2)
CPU: 1 UID: 0 PID: 6764 Comm: syz.2.223 Not tainted syzkaller #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: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 7b 5f 03 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:ffffc900001dfb58 EFLAGS: 00000206
RAX: 946bd27052765a00 RBX: 0000000000000000 RCX: 946bd27052765a00
RDX: 0000000000000000 RSI: ffffffff8dba9858 RDI: ffffffff8be33e00
RBP: ffffffff8172d195 R08: 0000000000000000 R09: ffffffff8172d195
R10: ffffc900001dfd18 R11: ffffffff81ac4d00 R12: 0000000000000002
R13: ffffffff8e13a120 R14: 0000000000000000 R15: 0000000000000246
FS:  00007f39326046c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 000000010f61a000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 unwind_next_frame+0xc2/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kfree+0x18e/0x440
 ieee80211_inform_bss+0xbd9/0x10a0
 cfg80211_inform_single_bss_data+0xd05/0x1ac0
 cfg80211_inform_bss_data+0x1fb/0x3b30
 cfg80211_inform_bss_frame_data+0x3d7/0x730
 ieee80211_bss_info_update+0x746/0x9e0
 ieee80211_scan_rx+0x593/0xa20
 ieee80211_rx_list+0x201c/0x2a90
 ieee80211_rx_napi+0x1a8/0x3d0
 ieee80211_handle_queued_frames+0xe8/0x1f0
 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:memcg_rstat_updated+0xc6/0x220
Code: 03 42 80 3c 38 00 74 08 48 89 df e8 74 7b f8 ff 48 8b 1b 4a 8d 2c 2b 48 83 c5 10 49 89 ee 49 c1 ee 03 4d 89 fc 43 80 3c 3e 00 <74> 08 48 89 ef e8 50 7b f8 ff 48 89 6c 24 10 4c 8b 7d 00 b8 a8 06
RSP: 0018:ffffc900046273f0 EFLAGS: 00000246
RAX: 1ffffffff1b7c5a3 RBX: ffff8881a3c13000 RCX: 946bd27052765a00
RDX: 0000000000000000 RSI: ffffffff8be33de0 RDI: ffffffff8be33da0
RBP: ffffe8ffffc2b4d0 R08: ffffc90004627367 R09: 1ffff920008c4e6c
R10: dffffc0000000000 R11: fffff520008c4e6d R12: dffffc0000000000
R13: 0000607e5c0184c0 R14: 1ffffd1ffff8569a R15: dffffc0000000000
 mod_memcg_state+0x113/0x2f0
 refill_obj_stock+0x4df/0x850
 __memcg_slab_free_hook+0x127/0x3d0
 kmem_cache_free+0x223/0x400
 finish_task_switch+0x3ee/0x950
 __schedule+0x17a0/0x4cc0
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 _raw_spin_unlock_irqrestore+0xfd/0x110
 debug_object_activate+0x2e2/0x420
 call_rcu+0xaa/0x9c0
 evict+0x847/0x9c0
 __dentry_kill+0x209/0x660
 dput+0x19f/0x2b0
 __fput+0x68e/0xa70
 fput_close_sync+0x119/0x200
 __x64_sys_close+0x7f/0x110
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f393178eba9
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:00007f3932604038 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007f39319d5fa0 RCX: 00007f393178eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000009
RBP: 00007f3931811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f39319d6038 R14: 00007f39319d5fa0 R15: 00007ffecf6bd5b8
 </TASK>
sched: DL replenish lagged too much
