rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (8795 ticks this GP) idle=823c/1/0x4000000000000000 softirq=18088/18088 fqs=4754
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   787912          0            0
rcu: 	cputime:    37718      14771           81   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=11333 q=9266 ncpus=2)
CPU: 1 UID: 0 PID: 6799 Comm: syz.0.260 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:__kasan_check_byte+0x6/0x40
Code: 84 da fe ff ff 48 ff c8 49 89 c4 e9 cf fe ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 41 56 <53> 48 89 f3 49 89 fe e8 5e 14 00 00 84 c0 75 16 be 01 00 00 00 4c
RSP: 0018:ffffc900001dfae8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 4b169a3860288d00
RDX: 0000000000000000 RSI: ffffffff8172c1b2 RDI: ffffffff8e139ea0
RBP: ffffffff8172c195 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc900001dfcb8 R11: ffffffff81ac3930 R12: 0000000000000002
R13: ffffffff8e139ea0 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f9133f846c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9133f83fa0 CR3: 000000001fd12000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000f0602
Call Trace:
 <IRQ>
 lock_acquire+0x8d/0x360
 unwind_next_frame+0xc2/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 kvfree_call_rcu+0xbb/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 98 15 f6 e8 36 f3 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:ffffc900024ef7c0 EFLAGS: 00000282
RAX: 4b169a3860288d00 RBX: 0000000000000000 RCX: 4b169a3860288d00
RDX: 0000000000000000 RSI: ffffffff8d9b6a5f RDI: 0000000000000001
RBP: ffffc900024ef860 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200049def8
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:terminate_walk+0x16a/0x4b0
Code: 9c 4f 87 ff 48 8b 6c 24 10 4c 8d 7d 38 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 a8 02 00 00 <41> 8b 1f 89 de 81 e6 00 01 00 00 31 ff e8 a4 53 87 ff 81 e3 00 01
RSP: 0018:ffffc900024ef928 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900024efc74 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900024efc20 R08: ffff88802122566b R09: 1ffff11004244acd
R10: dffffc0000000000 R11: ffffed1004244ace R12: ffffc900024efc98
R13: 0000000000000000 R14: 1ffff9200049df93 R15: ffffc900024efc58
 path_openat+0x2e01/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f913318d550
Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 49 94 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 9c 94 02 00 8b 44
RSP: 002b:00007f9133f83f10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f913318d550
RDX: 0000000000000002 RSI: 00007f9133f83fa0 RDI: 00000000ffffff9c
RBP: 00007f9133f83fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f91333c6128 R14: 00007f91333c6090 R15: 00007ffc248010a8
 </TASK>
sched: DL replenish lagged too much
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 87781967765 wd_nsec: 87781969852
