rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10494 ticks this GP) idle=b77c/1/0x4000000000000000 softirq=21596/21598 fqs=4722
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   789877          0            0
rcu: 	cputime:    36876      15622           58   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=13381 q=12608 ncpus=2)
CPU: 0 UID: 0 PID: 6941 Comm: syz.1.283 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:should_failslab+0x0/0x100
Code: ff 4c 89 ff e8 e1 76 ff ff e9 f6 fc ff ff cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 41 57 41 56 41 54 53 89 f3 49 89 fe 49 bc 00 00 00 00
RSP: 0018:ffffc900000071a0 EFLAGS: 00000246
RAX: 0000000000400140 RBX: 0000000000000920 RCX: dffffc0000000000
RDX: 0000000000000100 RSI: 0000000000000920 RDI: ffff88801a441280
RBP: 0000000000000920 R08: ffff888020fb5640 R09: 0000000000000003
R10: 0000000000000002 R11: 0000000000000100 R12: ffff88801a441280
R13: 0000000000000920 R14: 0000000000000000 R15: 0000000000000048
FS:  00007fb7d05726c0(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000023962000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000f0602
Call Trace:
 <IRQ>
 __kmalloc_noprof+0xcb/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: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 5b 6a 15 f6 e8 16 c5 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:ffffc9000300f8c0 EFLAGS: 00000282
RAX: a36c77102f1a2600 RBX: 0000000000000000 RCX: a36c77102f1a2600
RDX: 0000000000000007 RSI: ffffffff8d9b7034 RDI: 0000000000000001
RBP: ffffc9000300f960 R08: ffffffff8fa38237 R09: 1ffffffff1f47046
R10: dffffc0000000000 R11: fffffbfff1f47047 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000601f18
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:mas_start+0x2ae/0x560
Code: 48 8b 44 24 18 0f b6 04 28 84 c0 0f 85 fc 00 00 00 48 8b 04 24 c6 00 00 49 81 e4 00 ff ff ff 4c 89 e0 48 c1 e8 03 80 3c 28 00 <74> 08 4c 89 e7 e8 88 c6 b2 f6 49 8b 04 24 48 c7 c1 00 ff ff ff 48
RSP: 0018:ffffc9000300fa28 EFLAGS: 00000246
RAX: 1ffff11004486ac0 RBX: ffffc9000300fb00 RCX: ffff888020fb5640
RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000002
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff8b71f15c
R10: dffffc0000000000 R11: fffffbfff1f47047 R12: ffff888022435600
R13: ffffc9000300fb18 R14: 0000000000000002 R15: ffffc9000300fb38
 mt_find+0x211/0x5f0
 find_vma+0xe7/0x160
 lock_mm_and_find_vma+0x5f/0x300
 do_user_addr_fault+0x331/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0010:__put_user_4+0xd/0x20
Code: 66 89 01 31 c9 0f 1f 00 e9 10 45 03 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 89 cb 48 c1 fb 3f 48 09 d9 0f 1f 00 <89> 01 31 c9 0f 1f 00 c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000300fe50 EFLAGS: 00010246
RAX: 000000000000000e RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8dba631f RDI: ffffffff8be33500
RBP: 000000000000000e R08: 0000000000000000 R09: ffffffff820bbcb0
R10: dffffc0000000000 R11: ffffed1004092799 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000026 R15: 0000000000000005
 __sys_socketpair+0xb7/0x560
 __x64_sys_socketpair+0x9b/0xb0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb7cf78ebe9
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:00007fb7d0572038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007fb7cf9c5fa0 RCX: 00007fb7cf78ebe9
RDX: 000000000000e183 RSI: 0000000000000005 RDI: 0000000000000026
RBP: 00007fb7cf811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb7cf9c6038 R14: 00007fb7cf9c5fa0 R15: 00007ffc29061f18
 </TASK>
sched: DL replenish lagged too much
