rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10460 ticks this GP) idle=ca2c/1/0x4000000000000000 softirq=19632/19806 fqs=5232
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1281525        651            0
rcu: 	cputime:    32022      20474           40   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=12981 q=4494 ncpus=2)
CPU: 1 UID: 0 PID: 6902 Comm: syz.0.277 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:deref_stack_reg+0x1b3/0x230
Code: 39 f0 0f 96 c0 20 c8 3c 01 75 30 4c 89 c7 49 89 f7 e8 11 08 00 00 49 89 c6 48 8b 5c 24 18 48 89 d8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 c3 39 b0 00 4c 89 33 b0 01 eb 02 31 c0 48 83 c4
RSP: 0018:ffffc900001dfb40 EFLAGS: 00000246
RAX: 1ffff9200003bf95 RBX: ffffc900001dfca8 RCX: 0000000000000001
RDX: ffffc900001dfca8 RSI: dffffc0000000000 RDI: ffffc900001e03f0
RBP: 1ffff9200003bf8d R08: ffffc900001e03f0 R09: 0000000000000000
R10: ffffc900001dfcb8 R11: fffff5200003bf99 R12: 1ffff9200003bf8e
R13: 1ffff9200003bf8f R14: ffffc900001e0798 R15: dffffc0000000000
FS:  00007fc9afb446c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff95404908 CR3: 000000003ff9a000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0x17c4/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 kvfree_call_rcu+0xbb/0x410
 cfg80211_update_known_bss+0x634/0x1330
 __cfg80211_bss_update+0x147/0x2120
 cfg80211_inform_single_bss_data+0xba9/0x1ac0
 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 fb 88 15 f6 e8 36 e3 4c 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:ffffc900064efa60 EFLAGS: 00000286
RAX: 61aff5a5933e9b00 RBX: 0000000000000000 RCX: 61aff5a5933e9b00
RDX: 0000000000000000 RSI: ffffffff8d9b6a7d RDI: 0000000000000001
RBP: ffffc900064efb00 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000c9df4c
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:should_fail_ex+0x14d/0x560
Code: eb 4b 65 4c 8b 3c 25 08 40 a0 92 49 81 c7 e4 15 00 00 4d 89 fd 49 c1 ed 03 43 0f b6 44 25 00 84 c0 0f 85 f4 02 00 00 41 8b 2f <85> ed 0f 84 e2 fe ff ff ff cd 43 0f b6 44 25 00 84 c0 0f 85 15 03
RSP: 0018:ffffc900064efbc8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8e259660 RCX: 61aff5a5933e9b00
RDX: 0000000000000000 RSI: 0000000000000020 RDI: ffffffff8e259660
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8215cd3d
R10: 000000000000000c R11: fffffbfff1f47007 R12: dffffc0000000000
R13: 1ffff11003eb19ec R14: 0000000000000020 R15: ffff88801f58cf64
 should_failslab+0xa8/0x100
 __kmalloc_noprof+0xcb/0x4f0
 security_sk_alloc+0x52/0x390
 sk_prot_alloc+0x101/0x220
 sk_alloc+0x3a/0x370
 __netlink_create+0x65/0x260
 netlink_create+0x3ca/0x590
 __sock_create+0x4b3/0x9f0
 __sys_socket+0xd7/0x1b0
 __x64_sys_socket+0x7a/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc9aed8eba9
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:00007fc9afb44038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007fc9aefd5fa0 RCX: 00007fc9aed8eba9
RDX: 000000000000000c RSI: 0000000000000003 RDI: 0000000000000010
RBP: 00007fc9aee11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc9aefd6038 R14: 00007fc9aefd5fa0 R15: 00007ffd54992108
 </TASK>
sched: DL replenish lagged too much
