rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10481 ticks this GP) idle=7a74/1/0x4000000000000000 softirq=15255/15255 fqs=4560
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   977613          0            0
rcu: 	cputime:    33215      19284           48   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=7861 q=5632 ncpus=2)
CPU: 1 UID: 0 PID: 6078 Comm: syz.1.47 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:kernel_text_address+0x1c/0xe0
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 41 56 53 48 81 ff 00 00 00 81 0f 93 c0 48 81 ff 6c 03 7d 8b 0f 92 c1 <bd> 01 00 00 00 84 c8 75 0c 48 89 fb e8 e3 45 a7 ff 85 c0 74 0c 89
RSP: 0018:ffffc900001dfc18 EFLAGS: 00000297
RAX: 0000000000000001 RBX: ffffffff8acc0327 RCX: 0e7fca2500c99d01
RDX: 0000000000000005 RSI: ffffffff8dba5cac RDI: ffffffff8acc0327
RBP: ffffc900001dfcf0 R08: ffffc900001e00e0 R09: 0000000000000000
R10: ffffc900001dfcb8 R11: fffff5200003bf99 R12: ffff8881083a9cc0
R13: ffffc900001e0280 R14: dffffc0000000000 R15: 1ffff9200003bf96
FS:  00007fb2679d16c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000105be2000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000050602
Call Trace:
 <IRQ>
 __kernel_text_address+0xd/0x40
 unwind_get_return_address+0x4d/0x90
 arch_stack_walk+0xfc/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:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 2f b7 ea 09 e8 5a 3f 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900042af898 EFLAGS: 00000282
RAX: 0e7fca2500c99d00 RBX: 0000000000000000 RCX: 0e7fca2500c99d00
RDX: 0000000000000006 RSI: ffffffff8d9b6a0a RDI: ffffffff8be33300
RBP: ffffc900042af8f0 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: ffff8881083a9cc0
R13: dffffc0000000000 R14: ffff888020c68000 R15: ffff88813663ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_notrace+0xd1/0x110
 preempt_schedule_notrace_thunk+0x16/0x30
 rcu_is_watching+0x7f/0xb0
 trace_kmalloc+0x1f/0xd0
 __kmalloc_cache_noprof+0x220/0x3d0
 find_get_pmu_context+0x8b/0x890
 __se_sys_perf_event_open+0xbfd/0x1d70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb266b8ebe9
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:00007fb2679d1038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fb266db5fa0 RCX: 00007fb266b8ebe9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000000
RBP: 00007fb266c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000000a R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb266db6038 R14: 00007fb266db5fa0 R15: 00007fff481c4ed8
 </TASK>
sched: DL replenish lagged too much
