rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=373c/1/0x4000000000000000 softirq=14705/14707 fqs=4351
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   981811          0            0
rcu: 	cputime:    34260      18039          103   ==> 52310(ms)
rcu: 	(t=10502 jiffies g=8373 q=3099 ncpus=2)
CPU: 1 UID: 0 PID: 5974 Comm: syz.0.20 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+0x1312/0x2390
Code: 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 8d 47 fc 48
RSP: 0018:ffffc900001dfd38 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff9021b108 RCX: dffffc0000000000
RDX: ffffffff9021b108 RSI: ffffffff90d2cb16 RDI: ffffffff8be33e20
RBP: ffffffff9021b108 R08: 0000000000000009 R09: ffffffff8172d195
R10: ffffc900001dfe58 R11: ffffffff81ac4d00 R12: ffffffff8aeba162
R13: ffffffff9021b108 R14: ffffc900001dfe08 R15: ffffffff9021b108
FS:  00007f78bc1596c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000002603a000 CR4: 00000000000006f0
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:lock_release+0x2b5/0x3e0
Code: 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 0b 4d 03 11 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90004596b78 EFLAGS: 00000206
RAX: e75788daf8ee3800 RBX: 0000000000000202 RCX: e75788daf8ee3800
RDX: 0000000000000000 RSI: ffffffff8dba984d RDI: ffffffff8be33e80
RBP: ffff88810a020af0 R08: ffffc90004596c6f R09: 0000000000000000
R10: ffffc90004596c60 R11: ffffffffa000080c R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8e13a120 R15: ffff88810a020000
 trace_call_bpf+0x5a9/0x850
 perf_trace_run_bpf_submit+0x78/0x170
 perf_trace_lock_acquire+0x335/0x410
 lock_acquire+0x311/0x360
 unwind_next_frame+0xc2/0x2390
 __unwind_start+0x5b9/0x760
 arch_stack_walk+0xe4/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x27a/0x4f0
 memcg_list_lru_alloc+0x261/0x7e0
 __memcg_slab_post_alloc_hook+0x13c/0x7f0
 kmem_cache_alloc_lru_noprof+0x2c7/0x3d0
 __d_alloc+0x36/0x7a0
 path_from_stashed+0x384/0x5c0
 proc_ns_get_link+0xec/0x210
 pick_link+0x636/0xe80
 step_into+0xc5d/0xf30
 path_openat+0x1bc6/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78bb38d510
Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 49 94 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 9c 94 02 00 8b 44
RSP: 002b:00007f78bc158f10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f78bb38d510
RDX: 0000000000000002 RSI: 00007f78bc158fa0 RDI: 00000000ffffff9c
RBP: 00007f78bc158fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f78bb5d6038 R14: 00007f78bb5d5fa0 R15: 00007ffe2015f978
 </TASK>
sched: DL replenish lagged too much
