rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10448 ticks this GP) idle=e85c/1/0x4000000000000000 softirq=16552/16553 fqs=4647
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   790900          0            0
rcu: 	cputime:    37647      14831           57   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=10285 q=4395 ncpus=2)
CPU: 0 UID: 0 PID: 6720 Comm: syz.0.218 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:_raw_spin_unlock_irqrestore+0xa8/0x110
Code: 74 05 e8 4b 77 4b 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> 93 1e 14 f6 65 8b 05 6c 61 24 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc90000006f60 EFLAGS: 00000206
RAX: e1839f1254d34b00 RBX: 0000000000000282 RCX: e1839f1254d34b00
RDX: 0000000000000002 RSI: ffffffff8d9b6a7d RDI: 0000000000000001
RBP: ffffc90000006fe0 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: dffffc0000000000
R13: ffff88801e3a7010 R14: ffff88804b033cb0 R15: 1ffff92000000dec
FS:  00007f45625e86c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000640 CR3: 0000000039482000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000010602
Call Trace:
 <IRQ>
 kvfree_call_rcu+0x374/0x410
 cfg80211_update_known_bss+0x634/0x1330
 __cfg80211_bss_update+0x147/0x2120
 cfg80211_inform_single_bss_data+0xba9/0x1ac0
 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: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 fb 88 15 f6 e8 36 e3 4c f6 fb bf 01 00 00 00 <e8> 5b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc9000747fb20 EFLAGS: 00000282
RAX: e1839f1254d34b00 RBX: 0000000000000000 RCX: e1839f1254d34b00
RDX: 0000000000000000 RSI: ffffffff8d9b6a7d RDI: 0000000000000001
RBP: ffffc9000747fbd0 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000e8ff64
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:sk_prot_alloc+0x153/0x220
Code: f8 eb 5d e8 4f a4 66 f8 eb 56 49 81 c7 88 01 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 70 19 ca f8 49 8b 3f <e8> 88 8b 51 f8 84 c0 74 0e e8 1f a4 66 f8 eb 29 e8 18 a4 66 f8 eb
RSP: 0018:ffffc9000747fc90 EFLAGS: 00000246
RAX: 1ffffffff1ec7759 RBX: ffff88801af04a00 RCX: 0000000000000002
RDX: ffff888119cb9cc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff8881000120fb R09: 1ffff1102000241f
R10: dffffc0000000000 R11: ffffed1020002420 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff8881102c1100 R15: ffffffff8f63bac8
 sk_alloc+0x3a/0x370
 unix_create1+0xb0/0x7c0
 unix_create+0x16b/0x210
 __sock_create+0x4b3/0x9f0
 __sys_socketpair+0x23a/0x560
 __x64_sys_socketpair+0x9b/0xb0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f456178eba9
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:00007f45625e8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f45619d5fa0 RCX: 00007f456178eba9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000001
RBP: 00007f4561811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f45619d6038 R14: 00007f45619d5fa0 R15: 00007ffe6e9db138
 </TASK>
sched: DL replenish lagged too much
