rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10435 ticks this GP) idle=83dc/1/0x4000000000000000 softirq=24891/25199 fqs=5232
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1176394        848            0
rcu: 	cputime:    33124      19352           42   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=18393 q=3064 ncpus=2)
CPU: 0 UID: 0 PID: 7937 Comm: syz.3.521 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_lock+0x2a/0x60
Code: f3 0f 1e fa 53 65 48 8b 1c 25 08 d0 a0 92 48 81 c3 44 04 00 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 18 ff 03 8b 03 3d 00 00 00 40 7d 07 5b c3 cc cc cc cc cc
RSP: 0000:ffffc90000007368 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: ffff888021b6da84 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: ffffffff810014ca RDI: ffffc90000007448
RBP: dffffc0000000000 R08: ffffc90000007510 R09: 0000000000000012
R10: ffffc90000007498 R11: ffffffff81ac4d00 R12: 1ffff92000000e89
R13: ffffc90000007480 R14: ffffc90000007448 R15: ffffc90008e876f8
FS:  00007f23caef06c0(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3071eff8 CR3: 00000000295ce000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0x9e/0x2390
 arch_stack_walk+0x11c/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
 skb_copy+0x188/0x800
 mac80211_hwsim_tx_frame_no_nl+0xcd3/0x11c0
 mac80211_hwsim_tx_frame+0x1b5/0x200
 mac80211_hwsim_beacon_tx+0x3f0/0x860
 __iterate_interfaces+0x2ab/0x590
 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180
 mac80211_hwsim_beacon+0xbb/0x1c0
 __hrtimer_run_queues+0x52c/0xc60
 hrtimer_run_softirq+0x187/0x2b0
 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:stack_depot_save_flags+0x1ab/0x860
Code: 02 00 00 31 f6 4c 89 54 24 18 e8 a0 2b c9 ff 4c 8b 54 24 18 8b 74 24 04 85 db 75 5d 4d 8b 3f 4d 39 e7 74 52 41 39 6f 10 75 f2 <45> 39 57 14 75 ec 31 c0 49 8b 0c c6 49 3b 4c c7 20 75 df 48 ff c0
RSP: 0000:ffffc90008e877a8 EFLAGS: 00000246
RAX: ffff888135400000 RBX: 0000000000000000 RCX: 0000000000b44ee0
RDX: 000000009fc29fdd RSI: 0000000000000000 RDI: 0000000029c770b2
RBP: 00000000191b44ee R08: 00000000aacd8f1a R09: 000000000451095b
R10: 0000000000000007 R11: fffffbfff1f47527 R12: ffff888135f44ee0
R13: 0000000000000007 R14: ffffc90008e87810 R15: ffff88810554f9a0
 kasan_save_stack+0x4d/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0x157/0x9c0
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:irqentry_exit_to_user_mode+0x51/0x120
Code: 07 85 c0 0f 85 c3 00 00 00 e8 8b f4 2f f6 65 4c 8b 34 25 08 d0 a0 92 49 8b 3e f7 c7 1e 30 02 00 74 53 49 89 ff e8 7f f3 2f f6 <4c> 89 f8 a8 18 74 08 e8 03 1b 01 00 4c 89 f8 a9 00 10 00 00 74 0b
RSP: 0000:ffffc90008e87f38 EFLAGS: 00000286
RAX: 04372d87e6f5c400 RBX: ffffc90008e87f58 RCX: 04372d87e6f5c400
RDX: 0000000000000000 RSI: ffffffff8d9ba191 RDI: ffffffff8be33e80
RBP: 0000000000000000 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888021b6d640 R15: 0000000000000008
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0033:0x7f23c9e5eb40
Code: 83 c4 68 5b 5d 41 5c 41 5e c3 48 8b 44 24 18 48 8b 1c 24 48 8b 70 78 8b 78 08 48 8d 53 30 e8 f7 57 ff ff 48 89 83 88 00 00 00 <e9> 58 fe ff ff 0f 1f 00 8b 7c 24 14 48 8d 74 24 40 ba 0f 00 00 00
RSP: 002b:00007f23caef0060 EFLAGS: 00000202
RAX: 0000000000000006 RBX: 00007f23ca1d5fa0 RCX: 00007f23ca011e19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180
RBP: 00007f23ca011e19 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f23ca1d6038 R14: 00007f23ca1d5fa0 R15: 00007ffcff313e38
 </TASK>
sched: DL replenish lagged too much
