rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10446 ticks this GP) idle=3094/1/0x4000000000000000 softirq=44107/44289 fqs=5111
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1141259        645            0
rcu: 	cputime:    29985      22501           49   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=43349 q=3818 ncpus=2)
CPU: 1 UID: 0 PID: 13869 Comm: syz.6.2345 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:unwind_next_frame+0x484/0x23c0
Code: d2 84 c0 48 0f 45 d1 48 89 15 18 b0 ab 11 48 85 d2 0f 84 40 02 00 00 4c 8d 62 04 4c 8d 6a 05 4c 89 e0 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 66 18 00 00 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 0f
RSP: 0018:ffffc90000a07c58 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: ffffffff902c8bb0 RCX: ffffffff902c8bb4
RDX: ffffffff90a9f832 RSI: ffffffff90a9f832 RDI: ffffffff8c27b3a0
RBP: dffffc0000000000 R08: 0000000000000003 R09: ffffffff8e75e3e0
R10: ffffc90000a07d78 R11: ffffffff81b0bfa0 R12: ffffffff90a9f836
R13: ffffffff90a9f837 R14: ffffc90000a07d28 R15: ffffffff902c8bb0
FS:  00007f9c6f2986c0(0000) GS:ffff8882a9463000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efcfda7eb81 CR3: 000000017cc42000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 kvfree_call_rcu+0xff/0x430
 cfg80211_update_known_bss+0x830/0x1590
 __cfg80211_bss_update+0x147/0x2110
 cfg80211_inform_single_bss_data+0xbd1/0x1b70
 cfg80211_inform_bss_data+0x266/0x3c40
 cfg80211_inform_bss_frame_data+0x3c7/0x760
 ieee80211_bss_info_update+0x794/0xa40
 ieee80211_scan_rx+0x552/0xa40
 ieee80211_rx_list+0x29e5/0x3710
 ieee80211_rx_napi+0x1b1/0x3e0
 ieee80211_handle_queued_frames+0xe8/0x1e0
 tasklet_action_common+0x2da/0x4b0
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 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+0x48/0xa0
Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 63 c5 e4 f5 e8 1e 60 1e f6 fb bf 01 00 00 00 <e8> c3 a6 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 f4 61 1e f6 bf 01
RSP: 0018:ffffc90004a6f760 EFLAGS: 00000206
RAX: 000000000009aff3 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8def4b7d RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff90118bb7 R09: 1ffffffff2023176
R10: dffffc0000000000 R11: fffffbfff2023177 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
 irqentry_exit+0x599/0x620
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:kasan_check_range+0x9d/0x2c0
Code: 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 3d 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 0f 85 9e 01 00 00 <49> ff c3 48 ff c3 75 ee e9 1d 01 00 00 44 89 dd 83 e5 07 0f 84 b5
RSP: 0018:ffffc90004a6f880 EFLAGS: 00000246
RAX: ffffc90004a6fd01 RBX: fffffffffffffffe RCX: ffffffff81768bee
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc90004a6f9f8
RBP: 0000000000000000 R08: ffffc90004a6fa07 R09: 1ffff9200094df40
R10: dffffc0000000000 R11: fffff5200094df3f R12: 0000000000000002
R13: 1ffff9200094df37 R14: fffff5200094df41 R15: 1ffff9200094df3f
 __asan_memset+0x22/0x50
 unwind_next_frame+0xeae/0x23c0
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0xee/0x890
 kmem_cache_free+0x439/0x630
 fput_close_sync+0x11f/0x240
 __x64_sys_close+0x7e/0x110
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9c6e39c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9c6f298028 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007f9c6e616090 RCX: 00007f9c6e39c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f9c6e432c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9c6e616128 R14: 00007f9c6e616090 R15: 00007fffffde6838
 </TASK>
sched: DL replenish lagged too much
