rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10414 ticks this GP) idle=05dc/1/0x4000000000000000 softirq=27334/27337 fqs=5095
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1353276          0            0
rcu: 	cputime:    21151      31336           67   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=24465 q=8980 ncpus=2)
CPU: 1 UID: 0 PID: 8399 Comm: syz.0.682 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+0x223/0x2550
Code: 86 73 04 00 00 44 89 f8 4c 8d 2c 85 08 4c 71 91 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 48 89 eb 0f 85 85 1d 00 00 45 8b 6d 00 <44> 89 f8 ff c0 48 8d 2c 85 08 4c 71 91 48 89 e8 48 c1 e8 03 0f b6
RSP: 0018:ffffc90000a07a58 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000300
RDX: 00000000000aac9e RSI: ffffffff8c28b0c0 RDI: ffffffff8c28b080
RBP: dffffc0000000000 R08: ffffffff8176f256 R09: ffffffff8e95cd60
R10: ffffc90000a07b78 R11: ffffffff81b0eb70 R12: ffffffff8b292558
R13: 00000000001c19dd R14: ffffc90000a07b28 R15: 00000000000a2925
FS:  00007f5ec40ec6c0(0000) GS:ffff8882a9289000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fca2751f532 CR3: 0000000173a00000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x35c/0x760
 ieee802_11_parse_elems_full+0x159/0x2ab0
 ieee80211_inform_bss+0x161/0x1160
 cfg80211_inform_single_bss_data+0xcf9/0x1af0
 cfg80211_inform_bss_data+0x266/0x3c40
 cfg80211_inform_bss_frame_data+0x3c7/0x730
 ieee80211_bss_info_update+0x794/0xa40
 ieee80211_scan_rx+0x552/0xa40
 ieee80211_rx_list+0x29f8/0x3740
 ieee80211_rx_napi+0x1b1/0x3e0
 ieee80211_handle_queued_frames+0xe8/0x1e0
 tasklet_action_common+0x2da/0x4b0
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 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+0x42a/0xbe0
Code: 24 e0 0d 00 00 00 00 00 00 0f 1f 44 00 00 49 83 c4 48 4c 89 e7 e8 06 7a 16 0a e8 61 f7 38 00 fb 49 8d bd b0 16 00 00 48 89 f8 <48> c1 e8 03 42 0f b6 04 38 84 c0 0f 85 7b 03 00 00 41 80 a5 b3 16
RSP: 0018:ffffc9000451f7d0 EFLAGS: 00000206
RAX: ffff88810e9016b0 RBX: 1ffff110478c7784 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8dfaa584 RDI: ffff88810e9016b0
RBP: ffffc9000451f830 R08: ffffffff9030b8f7 R09: 1ffffffff206171e
R10: dffffc0000000000 R11: fffffbfff206171f R12: ffff88823c63ae88
R13: ffff88810e900000 R14: ffff88811112bb00 R15: dffffc0000000000
 __schedule+0x1829/0x5740
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x760
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:up_write+0x62/0x410
Code: 42 0f b6 04 28 84 c0 0f 85 52 03 00 00 83 3d 98 a1 8f 0e 00 0f 85 b0 00 00 00 48 8d 6b 60 49 89 ee 49 c1 ee 03 43 80 3c 2e 00 <74> 08 48 89 ef e8 74 b8 8f 00 48 39 5b 60 0f 85 65 01 00 00 48 c7
RSP: 0018:ffffc9000451fb90 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff888167c0c0d8 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8e21d80f RDI: ffffffff8c28b0e0
RBP: ffff888167c0c138 R08: ffff8881066cce03 R09: 1ffff11020cd99c0
R10: dffffc0000000000 R11: ffffed1020cd99c1 R12: ffff888167c0c0d8
R13: dffffc0000000000 R14: 1ffff1102cf81827 R15: ffff88811941d508
 perf_fasync+0xcd/0x110
 do_vfs_ioctl+0x1117/0x1530
 __se_sys_ioctl+0x82/0x170
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5ec319cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5ec40ec028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5ec3415fa0 RCX: 00007f5ec319cdd9
RDX: 00002000000006c0 RSI: 0000000000005452 RDI: 0000000000000003
RBP: 00007f5ec3232d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5ec3416038 R14: 00007f5ec3415fa0 R15: 00007fff6b20a6f8
 </TASK>
sched: DL replenish lagged too much
