rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=fc5c/1/0x4000000000000000 softirq=162630/162631 fqs=3020
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   946617          0            0
rcu: 	cputime:    36381      15988          103   ==> 52370(ms)
rcu: 	(t=10500 jiffies g=136569 q=1717 ncpus=2)
CPU: 1 UID: 0 PID: 1175 Comm: syz.8.7683 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_is_watching+0x0/0xb0
Code: c7 c7 60 3c 76 8e e8 af f4 40 03 eb cc 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 41 57 41 56 53 65 ff 05 90 aa 71 11 e8 fb 36 04 0a 89
RSP: 0018:ffffc90000a07ea0 EFLAGS: 00000297
RAX: 0000000000000001 RBX: 0000000000000920 RCX: 0000000000000303
RDX: 0000000000000001 RSI: ffffffff82242888 RDI: ffff88823c63f4f8
RBP: ffff88823c63f4f8 R08: ffffffff82242888 R09: ffff88823c63f4f8
R10: ffffc90000a080c0 R11: fffff52000141020 R12: ffff888100041dc0
R13: ffffffff82242888 R14: ffff88823c63f4f8 R15: 0000000000000001
FS:  00007fb37c8026c0(0000) GS:ffff8882a945a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4809ad5b69 CR3: 0000000110a28000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lock_release+0x4b/0x3d0
 __kmalloc_noprof+0x297/0x760
 ieee802_11_parse_elems_full+0x159/0x2ab0
 ieee80211_inform_bss+0x161/0x1160
 cfg80211_inform_single_bss_data+0xd08/0x1b70
 cfg80211_inform_bss_data+0x266/0x3c40
 cfg80211_inform_bss_frame_data+0x3c7/0x760
 ieee80211_bss_info_update+0x794/0xa40
 ieee80211_scan_rx+0x552/0xa40
 ieee80211_rx_list+0x29e5/0x3710
 ieee80211_rx_napi+0x1b1/0x3e0
 ieee80211_handle_queued_frames+0xe8/0x1e0
 tasklet_action_common+0x2da/0x4b0
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__schedule+0x15fb/0x52d0
Code: 2b 4c 89 e7 4c 89 ee e8 f3 91 83 f5 48 89 c7 e8 2b 46 e5 f5 31 ff 4d 39 ec 40 0f 95 c7 e8 4d 4f e5 f5 48 8b 84 24 d8 00 00 00 <66> 42 c7 44 30 0c f8 f8 48 c7 84 24 20 01 00 00 0e 36 e0 45 4a c7
RSP: 0018:ffffc90008b2f840 EFLAGS: 00000202
RAX: 1ffff92001165f2c RBX: ffff88823c63ae58 RCX: 0000000080000002
RDX: 0000000000000000 RSI: ffffffff8c27c9e0 RDI: ffffffff8c27c9a0
RBP: ffffc90008b2fa30 R08: ffffffff9011b4b7 R09: 1ffffffff2023696
R10: dffffc0000000000 R11: fffffbfff2023697 R12: ffff888111f73a80
R13: ffff8881604b57c0 R14: dffffc0000000000 R15: 1ffff110478c772c
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x599/0x620
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_mm_and_find_vma+0x92/0x340
Code: c0 74 53 49 89 c5 48 89 1c 24 48 bb 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8 72 44 1c 00 49 8b 6d 00 <48> 89 ef 4c 89 f6 e8 53 e5 b1 ff 4c 39 f5 77 23 e8 e9 e2 b1 ff 4c
RSP: 0018:ffffc90008b2fb68 EFLAGS: 00000246
RAX: 1ffff110341e26d0 RBX: dffffc0000000000 RCX: 460556eb075a8d00
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff9a7f6aa0
RBP: 000000110c230000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff34fed54 R12: ffff88810009cc50
R13: ffff8881a0f13680 R14: 0000000000000000 R15: ffffc90008b2fc88
 do_user_addr_fault+0x330/0x1340
 exc_page_fault+0x6a/0xc0
 asm_exc_page_fault+0x26/0x30
RIP: 0010:strncpy_from_user+0xb7/0x2b0
Code: 00 00 4c 89 f6 e8 19 a7 da fc 49 83 fe 07 0f 86 9d 00 00 00 48 89 1c 24 4c 89 74 24 08 48 c7 c5 f8 ff ff ff 45 31 ff 4c 89 e3 <4f> 8b 34 3c 48 b8 ff fe fe fe fe fe fe fe 4d 8d 24 06 4d 89 f5 49
RSP: 0018:ffffc90008b2fd38 EFLAGS: 00010246
RAX: ffffffff84eafff7 RBX: 0000000000000000 RCX: ffff888111f73a80
RDX: 0000000000000000 RSI: 00000000000000a8 RDI: 0000000000000007
RBP: fffffffffffffff8 R08: ffff8881110460bf R09: 1ffff11022208c17
R10: dffffc0000000000 R11: ffffed1022208c18 R12: 0000000000000000
R13: 0000000000000000 R14: 00000000000000a8 R15: 0000000000000000
 do_getname+0x77/0x250
 do_sys_openat2+0xca/0x200
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb37b99c819
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:00007fb37c802028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fb37bc16180 RCX: 00007fb37b99c819
RDX: 00000000000c1842 RSI: 0000000000000000 RDI: ffffffffffffff9c
RBP: 00007fb37ba32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb37bc16218 R14: 00007fb37bc16180 R15: 00007ffec52f9ad8
 </TASK>
sched: DL replenish lagged too much
