rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10458 ticks this GP) idle=28cc/1/0x4000000000000000 softirq=38621/38622 fqs=4890
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1072183          0            0
rcu: 	cputime:    31996      20502           45   ==> 52500(ms)
rcu: 	(t=10501 jiffies g=29541 q=1750 ncpus=2)
CPU: 1 UID: 0 PID: 11220 Comm: syz.5.1644 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:rcu_is_watching+0x67/0xb0
Code: 89 f7 e8 2c d7 7f 00 48 c7 c3 58 af 6f 92 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d 19 2d c8 10 <74> 11 83 e0 04 c1 e8 02 5b 41 5e 41 5f c3 cc cc cc cc cc e8 31 e5
RSP: 0018:ffffc90000a07a98 EFLAGS: 00000202
RAX: 00000000000c28cc RBX: ffff88823c632f58 RCX: b5ee9ec0b785e000
RDX: 0000000000000000 RSI: ffffffff8bbf0e40 RDI: ffffffff8bbf0e00
RBP: ffffffff81738c45 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90000a07cd8 R11: fffff52000140f9d R12: 0000000000000002
R13: ffffffff8df3d6e0 R14: ffffffff8d92edd8 R15: dffffc0000000000
FS:  00007f525eb8b6c0(0000) GS:ffff8882a9f38000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001b9570000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lock_acquire+0x5f/0x360
 unwind_next_frame+0xc2/0x2390
 __unwind_start+0x5b9/0x760
 arch_stack_walk+0xe4/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kfree+0x19a/0x6d0
 ieee80211_inform_bss+0xbd9/0x10a0
 cfg80211_inform_single_bss_data+0xd05/0x1ac0
 cfg80211_inform_bss_data+0x203/0x3b40
 cfg80211_inform_bss_frame_data+0x3d7/0x730
 ieee80211_bss_info_update+0x749/0x9e0
 ieee80211_scan_rx+0x593/0xa20
 ieee80211_rx_list+0x2192/0x2c10
 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:raw_spin_rq_unlock_irq+0x13/0x90
Code: cc e8 21 cc b4 09 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 53 66 90 e8 64 61 b7 09 e8 cf a0 35 00 fb 5b <41> 5e 41 5f c3 cc cc cc cc cc f3 0f 1e fa 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc90003b97828 EFLAGS: 00000282
RAX: b5ee9ec0b785e000 RBX: ffff88823c639fc0 RCX: b5ee9ec0b785e000
RDX: 0000000000000000 RSI: ffffffff8d70f100 RDI: ffffffff8bbf0e60
RBP: ffffc90003b97a50 R08: ffffffff8f7cf077 R09: 1ffffffff1ef9e0e
R10: dffffc0000000000 R11: fffffbfff1ef9e0f R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88810a088000 R15: 1ffff110478c7558
 __schedule+0x19e0/0x4cc0
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 obj_cgroup_charge_account+0x3f4/0x660
 __memcg_slab_post_alloc_hook+0x3db/0x7d0
 kmem_cache_alloc_noprof+0x417/0x6e0
 alloc_empty_file+0x55/0x1d0
 alloc_file_pseudo+0x13d/0x210
 sock_alloc_file+0xb8/0x2e0
 __sys_socketpair+0x387/0x560
 __x64_sys_socketpair+0x9b/0xb0
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f525dd8f749
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:00007f525eb8b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f525dfe5fa0 RCX: 00007f525dd8f749
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007f525de13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000300 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f525dfe6038 R14: 00007f525dfe5fa0 R15: 00007ffdc4984da8
 </TASK>
sched: DL replenish lagged too much
