rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=50ac/1/0x4000000000000000 softirq=25228/25231 fqs=4093
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   770096          0            0
rcu: 	cputime:    37000      15400           59   ==> 52420(ms)
rcu: 	(t=10502 jiffies g=16481 q=3454 ncpus=2)
CPU: 0 UID: 0 PID: 8030 Comm: syz.3.879 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:clear_page_rep+0x4/0x20
Code: 32 d4 aa f6 e9 ca fe ff ff cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <b9> 00 02 00 00 31 c0 f3 48 ab c3 cc cc cc cc 90 90 90 90 90 90 90
RSP: 0018:ffffc90000006930 EFLAGS: 00000286
RAX: dffffc0000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888023110000
RBP: 1ffffffff1b7ac8f R08: ffffffff8fa37f37 R09: 0000000000000000
R10: ffffed1004622000 R11: fffffbfff1f46fe7 R12: fffa800023110000
R13: fffa800000000000 R14: 1ffffffff1b7ac8d R15: 0000000000000008
FS:  00007fdc668736c0(0000) GS:ffff8880b861a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000003bcba000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 00000000000f0602
Call Trace:
 <IRQ>
 post_alloc_hook+0x1bd/0x2a0
 get_page_from_freelist+0x21e4/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x8a/0x370
 ___slab_alloc+0xbeb/0x1410
 __kmalloc_noprof+0x305/0x4f0
 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:generic_exec_single+0x48a/0x500
Code: db 75 16 e8 c8 6e 0b 00 eb 15 e8 c1 6e 0b 00 e8 7c a6 c5 09 48 85 db 74 ea e8 b2 6e 0b 00 fb 31 c0 48 c7 44 24 20 0e 36 e0 45 <4b> c7 04 2c 00 00 00 00 66 43 c7 44 2c 09 00 00 43 c6 44 2c 0b 00
RSP: 0018:ffffc90002a1f9c0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc90003d39000 RSI: 000000000000028f RDI: 0000000000000290
RBP: ffffc90002a1fa90 R08: ffffffff8fa37f37 R09: 1ffffffff1f46fe6
R10: dffffc0000000000 R11: fffffbfff1f46fe7 R12: 1ffff92000543f3c
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000543f5d
 smp_call_function_single+0x351/0x590
 perf_install_in_context+0x593/0x8f0
 __se_sys_perf_event_open+0x193a/0x1d70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdc6598ebe9
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:00007fdc66873038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fdc65bb5fa0 RCX: 00007fdc6598ebe9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000100
RBP: 00007fdc65a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdc65bb6038 R14: 00007fdc65bb5fa0 R15: 00007ffeca312ca8
 </TASK>
sched: DL replenish lagged too much
