rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=c51c/1/0x4000000000000000 softirq=32848/32849 fqs=0
rcu: 	(detected by 1, t=10502 jiffies, g=35829, q=311 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 32 Comm: kworker/u9:1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:lock_is_held_type+0x9/0x150
Code: 86 19 8e 67 48 0f b9 3a 90 eb ce 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 <41> 55 41 54 53 bb ff ff ff ff 83 3d 56 be 88 04 00 0f 84 e4 00 00
RSP: 0018:ffffc90000007758 EFLAGS: 00000002
RAX: ffffffff89b84884 RBX: 0000000000000001 RCX: 0000000000010100
RDX: ffff8881036dd880 RSI: 00000000ffffffff RDI: ffff88811057e2c0
RBP: ffff88811057e300 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000ee0 R12: ffff8881036de3f8
R13: ffff88811057e000 R14: ffff88811057e300 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88818dc91000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555574b71a28 CR3: 0000000113dbe000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 advance_sched+0xd6/0xc20
 __hrtimer_run_queues+0x3c0/0xa20
 hrtimer_interrupt+0x44b/0x950
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:e1000_clean+0x3bc/0x2a90
Code: e8 a9 e1 22 fb eb 05 e8 a2 e1 22 fb 4d 8d 67 08 4d 89 e6 49 c1 ee 03 43 80 3c 2e 00 74 08 4c 89 e7 e8 38 3c 8e fb 49 8b 1c 24 <31> ff 48 89 de e8 5a e6 22 fb 48 85 db 0f 84 8c 00 00 00 e8 6c e1
RSP: 0018:ffffc90000007b20 EFLAGS: 00000246
RAX: ffffffff86a2c297 RBX: 000000007e308000 RCX: ffff8881036dd880
RDX: 0000000000000100 RSI: 0000000000000074 RDI: 000000000000006d
RBP: ffffc90000007cc8 R08: ffffffff9030b2f7 R09: 1ffffffff206165e
R10: dffffc0000000000 R11: fffffbfff206165f R12: ffffc900027e7110
R13: dffffc0000000000 R14: 1ffff920004fce22 R15: ffffc900027e7108
 __napi_poll+0xae/0x340
 net_rx_action+0x627/0xf70
 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:__schedule+0x17bc/0x5680
Code: d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 ca e9 87 f6 4c 89 23 4c 89 ef 4c 89 e6 e8 fc 29 8a f5 48 89 c7 e8 84 c9 eb f5 <31> ff 4d 39 e5 40 0f 95 c7 e8 66 d5 eb f5 48 8b 84 24 00 01 00 00
RSP: 0018:ffffc90000a77460 EFLAGS: 00000206
RAX: 0000000000092811 RBX: ffff88812103b008 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dfa884e RDI: ffffffff8c28b4e0
RBP: ffffc90000a77668 R08: ffffffff9030b2f7 R09: 1ffffffff206165e
R10: dffffc0000000000 R11: fffffbfff206165f R12: ffff8881036dd880
R13: ffff8881036dd880 R14: dffffc0000000000 R15: ffff88812103bb78
 preempt_schedule_notrace+0x57/0x90
 preempt_schedule_notrace_thunk+0x16/0x30
 stack_depot_save_flags+0x2ff/0x810
 kasan_save_track+0x4f/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x182/0x650
 ieee80211_iface_work+0xbdb/0x1380
 cfg80211_wiphy_work+0x2cf/0x460
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: rcu_preempt kthread starved for 10502 jiffies! g35829 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27968 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x11d0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 6778 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:smp_call_function_many_cond+0xfd8/0x13d0
Code: 01 31 ff e8 fa fc 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 a5 f8 0b 00 eb 37 f3 90 43 0f b6 04 2c 84 c0 75 10 <41> f7 06 01 00 00 00 74 1e e8 8a f8 0b 00 eb e5 44 89 f1 80 e1 07
RSP: 0018:ffffc90005c67560 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88823c63c2c8 RCX: ffff88810f379d80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90005c67688 R08: ffffffff9030b2f7 R09: 1ffffffff206165e
R10: dffffc0000000000 R11: fffffbfff206165f R12: 1ffff110242085b9
R13: dffffc0000000000 R14: ffff888121042dc8 R15: 0000000000000000
FS:  0000555574b56500(0000) GS:ffff8882a9291000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbab36beff8 CR3: 0000000113dbe000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 flush_tlb_mm_range+0x5c3/0x10b0
 dup_mmap+0x17a2/0x1d90
 copy_mm+0x13b/0x4a0
 copy_process+0x1f1c/0x4450
 kernel_clone+0x284/0x8f0
 __x64_sys_clone+0x1b6/0x230
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb8b8fc5852
Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffc4da85db0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffc4da85db0 RCX: 00007fb8b8fc5852
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffc4da85f3c R08: 0000000000000000 R09: 0000000000000001
R10: 0000555574b567d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 0000000000034e4a R15: 00007ffc4da85f90
 </TASK>
