Backtrace

WARNING: CPU: 1 PID: 11 at kernel/sched/core.c:2470 ttwu_queue_wakelist+0xc0/0xd0
Modules linked in: uinput rfcomm xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp tun bridge stp llc nft_objref nf_conntrack_netbios_ns nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_raw iptable_security ip_set nf_tables nfnetlink ip6table_filter ip6_tables iptable_filter cmac bnep sunrpc nls_utf8 hfsplus squashfs loop joydev btusb btrtl btbcm btintel bluetooth intel_rapl_msr bcm5974 ecdh_generic ecc intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp iTCO_wdt intel_pmc_bxt iTCO_vendor_support kvm_intel mei_hdcp kvm snd_hda_codec_cirrus snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_hda_codec irqbypass applesmc wl(POE) rapl intel_cstate intel_uncore
 cfg80211 snd_hda_core i2c_i801 pcspkr apple_mfi_fastcharge intel_pch_thermal snd_hwdep i2c_smbus snd_seq lpc_ich snd_seq_device thunderbolt snd_pcm rfkill snd_timer snd mei_me mei soundcore spi_pxa2xx_pci sbs acpi_als kfifo_buf sbshc industrialio spi_pxa2xx_platform dw_dmac apple_bl binfmt_misc ip_tables i915 i2c_algo_bit drm_kms_helper cec drm crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel uas usb_storage applespi video hid_apple fuse
CPU: 1 PID: 11 Comm: rcu_sched Tainted: P           OE     5.8.6-201.fc32.x86_64 #1
Hardware name: Apple Inc. MacBookAir7,2/Mac-937CB26E2E02BB01, BIOS 186.0.0.0.0 04/11/2019
RIP: 0010:ttwu_queue_wakelist+0xc0/0xd0
Code: e0 01 c1 e0 03 09 c8 41 88 84 24 8c 08 00 00 c7 42 68 01 00 00 00 e8 2f a8 07 00 b8 01 00 00 00 5b 5d 41 5c 41 5d c3 31 c0 c3 <0f> 0b 31 c0 eb f0 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57
RSP: 0000:ffffb709800e4e18 EFLAGS: 00010046
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000018bf0
RDX: ffff9e6e66c80000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: ffff9e6e66ca9c60
R10: 0000000000000000 R11: 0000000000000000 R12: ffff9e6e5a07a6c0
R13: 0000000000000001 R14: ffff9e6e5a07b25c R15: ffff9e6e66c80000
FS:  0000000000000000(0000) GS:ffff9e6e66c80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002fa0a001 CR4: 00000000003606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 try_to_wake_up+0x14f/0x5c0
 ? insert_work+0x46/0xc0
 __queue_work+0x1e0/0x410
 ? queue_work_node+0xe0/0xe0
 call_timer_fn+0x2d/0x130
 __run_timers.part.0+0xfe/0x240
 run_timer_softirq+0x26/0x50
 __do_softirq+0xd9/0x2c4
 asm_call_on_stack+0x12/0x20
 </IRQ>
 do_softirq_own_stack+0x39/0x50
 irq_exit_rcu+0xc2/0x100
 sysvec_apic_timer_interrupt+0x34/0x90
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:schedule+0x6c/0xb0
Code: 00 31 ff e8 76 f7 ff ff 48 8b 03 a8 08 75 f2 8b 45 24 a9 20 00 00 20 74 0e 48 89 ef a8 20 74 2a 5b 5d e9 97 aa 58 ff 5b 5d c3 <48> 8b bd d8 0b 00 00 48 85 ff 74 c2 48 8b 07 48 39 c7 74 1a be 01
RSP: 0000:ffffb7098008fe38 EFLAGS: 00000246
RAX: 0000000000000402 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000006c00000 RSI: 0000000000000246 RDI: 0000000000000246
RBP: ffff9e6e655726c0 R08: ffffffff94ab5be0 R09: ffffffff94ab5be0
R10: 0000000000000003 R11: 0000000000000000 R12: ffffb7098008fe58
R13: ffff9e6e655726c0 R14: 0000000000000001 R15: 0000000000000003
 schedule_timeout+0x7e/0x140
 ? __next_timer_interrupt+0xd0/0xd0
 rcu_gp_kthread+0x50f/0xb90
 ? rcu_nocb_cb_kthread+0x230/0x230
 kthread+0x119/0x140
 ? __kthread_bind_mask+0x60/0x60
 ret_from_fork+0x22/0x30