rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=6b14/1/0x4000000000000000 softirq=16840/16841 fqs=4909
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1034226          0            0
rcu: 	cputime:    30666      21823           46   ==> 52490(ms)
rcu: 	(t=10502 jiffies g=10297 q=2515 ncpus=2)
CPU: 0 UID: 0 PID: 6951 Comm: syz.0.303 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:lock_acquire+0x175/0x360
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 0b 2a d1 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90000006b18 EFLAGS: 00000206
RAX: c9c765db3a2a1300 RBX: 0000000000000000 RCX: c9c765db3a2a1300
RDX: 0000000000000000 RSI: ffffffff8d8f5dfe RDI: ffffffff8bbf0e60
RBP: ffffffff81738c45 R08: 0000000000000000 R09: ffffffff81738c45
R10: ffffc90000006cd8 R11: ffffffff81ac31b0 R12: 0000000000000002
R13: ffffffff8df3d6e0 R14: 0000000000000000 R15: 0000000000000246
FS:  00007f4ee14c96c0(0000) GS:ffff88818eb38000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c39df62 CR3: 00000001ad312000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0xc2/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kfree+0x19a/0x6d0
 ieee80211_inform_bss+0xbd9/0x10a0
 cfg80211_inform_single_bss_data+0xd05/0x1ac0
 cfg80211_inform_bss_data+0x203/0x3b40
 cfg80211_inform_bss_frame_data+0x3d7/0x730
 ieee80211_bss_info_update+0x749/0x9e0
 ieee80211_scan_rx+0x593/0xa20
 ieee80211_rx_list+0x2192/0x2c10
 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:_raw_spin_unlock_irqrestore+0xa8/0x110
Code: 74 05 e8 8b 3e 7e f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> d3 6c 46 f6 65 8b 05 dc f8 24 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc90004047c60 EFLAGS: 00000206
RAX: c9c765db3a2a1300 RBX: 0000000000000a06 RCX: c9c765db3a2a1300
RDX: 0000000000000006 RSI: ffffffff8d70f100 RDI: 0000000000000001
RBP: ffffc90004047cf0 R08: ffffffff8f7cf077 R09: 1ffffffff1ef9e0e
R10: dffffc0000000000 R11: fffffbfff1ef9e0f R12: dffffc0000000000
R13: ffff88810a771f40 R14: ffff8881120afc00 R15: 1ffff92000808f8c
 __se_sys_perf_event_open+0x1942/0x1d70
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4ee058f749
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:00007f4ee14c9038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f4ee07e5fa0 RCX: 00007f4ee058f749
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0
RBP: 00007f4ee0613f91 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4ee07e6038 R14: 00007f4ee07e5fa0 R15: 00007ffd6c30f808
 </TASK>
sched: DL replenish lagged too much
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6951 Comm: syz.0.303 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:asm_sysvec_apic_timer_interrupt+0x0/0x20
Code: 36 d6 46 0a e9 61 06 00 00 90 f3 0f 1e fa 0f 1f 00 fc 6a ff e8 11 05 00 00 48 89 c4 48 89 e7 e8 46 d5 46 0a e9 41 06 00 00 90 <f3> 0f 1e fa 0f 1f 00 fc 6a ff e8 f1 04 00 00 48 89 c4 48 89 e7 e8
RSP: 0018:ffffc90000007098 EFLAGS: 00000046
RAX: 1ffff110367ce034 RBX: ffff888100fe3c20 RCX: ffff88816b778000
RDX: 0000000000000000 RSI: ffff888100fe3c68 RDI: ffffc900000072c8
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000e2c R12: ffffc900000072c8
R13: ffff8881b3e70000 R14: 0000000000000001 R15: ffffc90000007260
FS:  00007f4ee14c96c0(0000) GS:ffff88818eb38000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c39df62 CR3: 00000001ad312000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
RIP: 0010:cmp_bss+0x0/0xe80
Code: 89 df e8 43 be 8b f7 eb 94 e8 2c 9b 25 f7 90 0f 0b 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 41 57 41 56 41 55 41 54 53 48 83 ec 58 89 d5 49 89 f7 49 89 fc
RSP: 0018:ffffc900000070c8 EFLAGS: 00000246
 __cfg80211_bss_update+0xdb/0x2120
 cfg80211_inform_single_bss_data+0xba9/0x1ac0
 cfg80211_inform_bss_data+0x203/0x3b40
 cfg80211_inform_bss_frame_data+0x3d7/0x730
 ieee80211_bss_info_update+0x749/0x9e0
 ieee80211_scan_rx+0x593/0xa20
 ieee80211_rx_list+0x2192/0x2c10
 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:_raw_spin_unlock_irqrestore+0xa8/0x110
Code: 74 05 e8 8b 3e 7e f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> d3 6c 46 f6 65 8b 05 dc f8 24 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc90004047c60 EFLAGS: 00000206
RAX: c9c765db3a2a1300 RBX: 0000000000000a06 RCX: c9c765db3a2a1300
RDX: 0000000000000006 RSI: ffffffff8d70f100 RDI: 0000000000000001
RBP: ffffc90004047cf0 R08: ffffffff8f7cf077 R09: 1ffffffff1ef9e0e
R10: dffffc0000000000 R11: fffffbfff1ef9e0f R12: dffffc0000000000
R13: ffff88810a771f40 R14: ffff8881120afc00 R15: 1ffff92000808f8c
 __se_sys_perf_event_open+0x1942/0x1d70
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4ee058f749
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:00007f4ee14c9038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f4ee07e5fa0 RCX: 00007f4ee058f749
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0
RBP: 00007f4ee0613f91 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4ee07e6038 R14: 00007f4ee07e5fa0 R15: 00007ffd6c30f808
 </TASK>
