rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10469 ticks this GP) idle=8f34/1/0x4000000000000000 softirq=35480/35485 fqs=4278
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1183879          0            0
rcu: 	cputime:    31998      20461           39   ==> 52470(ms)
rcu: 	(t=10502 jiffies g=28893 q=2495 ncpus=2)
CPU: 0 UID: 0 PID: 9665 Comm: syz.4.1003 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 3b 7b 03 11 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90000006c98 EFLAGS: 00000206
RAX: b5c2f32869628500 RBX: 0000000000000000 RCX: b5c2f32869628500
RDX: 0000000000000000 RSI: ffffffff8dbaa624 RDI: ffffffff8be34480
RBP: ffffffff8172d195 R08: 0000000000000000 R09: ffffffff8172d195
R10: ffffc90000006e58 R11: ffffffff81ac5140 R12: 0000000000000002
R13: ffffffff8e13a160 R14: 0000000000000000 R15: 0000000000000246
FS:  00007f59a2bde6c0(0000) GS:ffff8880b8611000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f54c7cfb028 CR3: 0000000011b32000 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_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: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 9f 80 ec 09 e8 ea 41 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:ffffc9000766eff8 EFLAGS: 00000282
RAX: b5c2f32869628500 RBX: 0000000000000000 RCX: b5c2f32869628500
RDX: 0000000000000000 RSI: ffffffff8d9baf70 RDI: ffffffff8be34480
RBP: ffffc9000766f050 R08: ffffffff8fa3b537 R09: 1ffffffff1f476a6
R10: dffffc0000000000 R11: fffffbfff1f476a7 R12: ffff888022611cc0
R13: dffffc0000000000 R14: ffff888020529cc0 R15: ffff88804b03ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:stack_trace_consume_entry+0x12e/0x280
Code: 77 00 49 89 e8 4c 89 e2 48 89 de 49 89 37 41 8b 18 41 0f b6 44 15 00 84 c0 0f 85 34 01 00 00 41 3b 1e 0f 92 c0 48 83 c4 18 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 44 89 c1 80 e1 07 80
RSP: 0018:ffffc9000766f3f8 EFLAGS: 00000296
RAX: 0000000000000001 RBX: ffffc9000766f4e0 RCX: b5c2f32869628500
RDX: dffffc0000000000 RSI: ffffffff8223b0ee RDI: ffffc9000766f4e0
RBP: 1ffff92000ecde9e R08: ffffc9000766f4f0 R09: 0000000000000000
R10: ffffc9000766f478 R11: ffffffff81ac5140 R12: 0000000000000000
R13: 1ffff92000ecde9d R14: ffffc9000766f4e8 R15: ffffc9000766f570
 arch_stack_walk+0x110/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 netlink_sendmsg+0x5c6/0xb30
 __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: 0033:0x7f59a1d8ec29
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:00007f59a2bde038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f59a1fd6090 RCX: 00007f59a1d8ec29
RDX: 0000000000000040 RSI: 0000200000009b40 RDI: 0000000000000007
RBP: 00007f59a1e11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f59a1fd6128 R14: 00007f59a1fd6090 R15: 00007ffe04ef6d78
 </TASK>
sched: DL replenish lagged too much
