rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10448 ticks this GP) idle=5f24/1/0x4000000000000000 softirq=20868/20869 fqs=5000
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   765432          2            0
rcu: 	cputime:    37403      15096           62   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=13693 q=3012 ncpus=2)
CPU: 1 UID: 0 PID: 7448 Comm: syz.1.418 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_read_unlock+0xa/0xe0
Code: 7c dc 48 89 df e8 e6 12 7c 00 eb d2 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 41 55 <41> 54 53 49 bf 00 00 00 00 00 fc ff df 65 48 8b 3c 25 08 d0 a0 92
RSP: 0018:ffffc900001df9b8 EFLAGS: 00000286
RAX: 8a218ce3d1f28600 RBX: ffffffff90d2c901 RCX: 8a218ce3d1f28600
RDX: 0000000000000004 RSI: ffffffff8dba9860 RDI: ffffffff8be33e00
RBP: dffffc0000000000 R08: ffffc900001e01f0 R09: 0000000000000000
R10: ffffc900001dfaf8 R11: fffff5200003bf61 R12: ffffc900001e0200
R13: ffffc900001d9000 R14: ffffc900001dfaa8 R15: ffffffff8172d195
FS:  00007f7b3878c6c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbad2e48d8a CR3: 000000002f72a000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000f0602
Call Trace:
 <IRQ>
 unwind_next_frame+0x19ae/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x27a/0x4f0
 ieee802_11_parse_elems_full+0x152/0x2ab0
 ieee80211_inform_bss+0x10c/0x10a0
 cfg80211_inform_single_bss_data+0xd05/0x1ac0
 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 ab 8a 14 f6 e8 16 e7 4b 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:ffffc90002aaf7c0 EFLAGS: 00000282
RAX: 8a218ce3d1f28600 RBX: 0000000000000000 RCX: 8a218ce3d1f28600
RDX: 0000000000000007 RSI: ffffffff8d9ba18e RDI: 0000000000000001
RBP: ffffc90002aaf860 R08: ffffffff8fa3a837 R09: 1ffffffff1f47506
R10: dffffc0000000000 R11: fffffbfff1f47507 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000555ef8
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:kasan_check_range+0x9f/0x2c0
Code: 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 41 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 <0f> 85 de 01 00 00 49 ff c3 48 ff c3 75 ee e9 21 01 00 00 44 89 dd
RSP: 0018:ffffc90002aaf928 EFLAGS: 00000246
RAX: 0000000000000001 RBX: fffffffffffffff6 RCX: ffffffff82378972
RDX: 0000000000000001 RSI: 0000000000000050 RDI: ffffc90002aafb00
RBP: 0000000000000000 R08: ffffc90002aafb4f R09: 1ffff92000555f69
R10: dffffc0000000000 R11: fffff52000555f60 R12: 000000000000000a
R13: dffffc0000000001 R14: fffff52000555f6a R15: 1ffff92000555f60
 __asan_memset+0x22/0x50
 path_openat+0x992/0x3830
 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: 0033:0x7f7b3798d510
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:00007f7b3878bf10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f7b3798d510
RDX: 0000000000000002 RSI: 00007f7b3878bfa0 RDI: 00000000ffffff9c
RBP: 00007f7b3878bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f7b37bd6038 R14: 00007f7b37bd5fa0 R15: 00007ffe5803f808
 </TASK>
sched: DL replenish lagged too much
