rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=a3d4/1/0x4000000000000000 softirq=48861/48862 fqs=4455
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1211261          0            0
rcu: 	cputime:    30439      22049           39   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=36837 q=12780 ncpus=2)
CPU: 0 UID: 0 PID: 10746 Comm: syz.5.1548 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:unwind_next_frame+0x130e/0x2390
Code: c1 e8 3f 48 01 c8 48 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 27 49 63 07 4c 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49
RSP: 0018:ffffc90000006d38 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffffffff8fb1ba88 RCX: dffffc0000000000
RDX: ffffffff8fb1ba1c RSI: ffffffff902adb36 RDI: ffffffff8be34420
RBP: ffffffff8fb1ba1c R08: 000000000000001c R09: ffffffff8172d195
R10: ffffc90000006e58 R11: ffffffff81ac5140 R12: ffffffff810012a5
R13: ffffffff8fb1ba1c R14: ffffc90000006e08 R15: ffffffff8fb1ba50
FS:  00007f0b374a16c0(0000) GS:ffff8880b8611000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560c35295ca3 CR3: 00000001061ec000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x27a/0x4f0
 cfg80211_inform_single_bss_data+0x905/0x1ac0
 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 eb de 13 f6 e8 b6 3b 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:ffffc900036fefa0 EFLAGS: 00000286
RAX: 5ad40238adb20500 RBX: 0000000000000000 RCX: 5ad40238adb20500
RDX: 0000000000000007 RSI: ffffffff8d9baef1 RDI: 0000000000000001
RBP: ffffc900036ff050 R08: ffffffff8fa3b537 R09: 1ffffffff1f476a6
R10: dffffc0000000000 R11: fffffbfff1f476a7 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920006dfdf4
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:anon_vma_interval_tree_verify+0x3d/0x150
Code: 00 00 00 00 fc ff df e8 c1 58 b8 ff 48 8d 7b 40 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 ea 7b 1c 00 4c 8b 73 40 49 89 dd <49> c1 ed 03 43 80 7c 25 00 00 74 08 48 89 df e8 cf 7b 1c 00 4c 8b
RSP: 0018:ffffc900036ff110 EFLAGS: 00000246
RAX: 1ffff110269d54f6 RBX: ffff888134eaa770 RCX: ffff888108931cc0
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888134eaa7b0
RBP: ffffc900036ff270 R08: ffff88803bfe9457 R09: 1ffff110077fd28a
R10: dffffc0000000000 R11: ffffed10077fd28b R12: dffffc0000000000
R13: ffff888134eaa770 R14: 00000007f0b347f8 R15: ffff888134eaa780
 validate_mm+0x20b/0x4b0
 expand_downwards+0x6d5/0xaa0
 lock_mm_and_find_vma+0x1b8/0x300
 do_user_addr_fault+0x331/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0010:rep_movs_alternative+0xf/0x90
Code: c4 10 e9 c4 0a 04 00 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 83 f9 40 73 44 83 f9 08 73 25 85 c9 74 0f <8a> 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 e9 8d 0a 04 00 66 2e
RSP: 0018:ffffc900036ff5d8 EFLAGS: 00010202
RAX: ffff888023aca001 RBX: ffff888023aca28e RCX: 0000000000000d72
RDX: 0000000000000001 RSI: 00007ff4d4260000 RDI: ffff888023aca28e
RBP: ffffc900036ff760 R08: ffff888023acafff R09: 1ffff110047595ff
R10: dffffc0000000000 R11: ffffed1004759600 R12: dffffc0000000000
R13: 0000000000000d72 R14: 00007ffffffff000 R15: 00007ff4d4260d72
 _copy_from_iter+0x60a/0x1790
 copy_page_from_iter+0xdd/0x170
 skb_copy_datagram_from_iter+0x306/0x720
 unix_stream_sendmsg+0x5d1/0xdf0
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0b3658ec29
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:00007f0b374a1038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f0b367d6090 RCX: 00007f0b3658ec29
RDX: 0000000000000000 RSI: 0000200000000b00 RDI: 0000000000000006
RBP: 00007f0b36611e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0b367d6128 R14: 00007f0b367d6090 R15: 00007ffc0c749ab8
 </TASK>
sched: DL replenish lagged too much
