Backtrace

WARNING: CPU: 2 PID: 37 at mm/mmu_notifier.c:502 __mmu_notifier_invalidate_range_start.cold+0x3f/0x4e
Modules linked in: rfcomm xt_CHECKSUM xt_MASQUERADE nf_nat_tftp nf_conntrack_tftp nf_nat_ftp nf_conntrack_ftp xt_CT ip6t_REJECT nf_reject_ipv6 ip6t_rpfilter ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ebtable_broute ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 tun bridge stp llc eveusb(OE) ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter cmac bnep vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) sunrpc squashfs loop ath3k btusb btrtl btbcm ath9k btintel ath9k_common bluetooth ath9k_hw mac80211 ecdh_generic intel_rapl_msr ath ecc cfg80211 at24 intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio kvm snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg irqbypass snd_hda_codec rapl snd_hda_core snd_hwdep intel_cstate snd_seq snd_seq_device snd_pcm
 pktcdvd snd_timer intel_uncore acer_wmi sparse_keymap wmi_bmof joydev iTCO_wdt intel_pmc_bxt iTCO_vendor_support snd mei_hdcp rfkill libarc4 i2c_i801 i2c_smbus pcspkr soundcore mei_me lpc_ich mei binfmt_misc ip_tables i915 i2c_algo_bit drm_kms_helper crct10dif_pclmul crc32_pclmul crc32c_intel cec sdhci_pci cqhci ghash_clmulni_intel sdhci drm mmc_core tg3 serio_raw video wmi fuse v4l2loopback_dc(OE) videodev mc
CPU: 2 PID: 37 Comm: kcompactd0 Tainted: G           OE     5.8.18-100.fc31.x86_64 #1
Hardware name: Acer Aspire E1-572G/EA50_HW   , BIOS V2.17 09/02/2014
RIP: 0010:__mmu_notifier_invalidate_range_start.cold+0x3f/0x4e
Code: 81 48 3e b5 48 c7 c7 88 48 3e b5 48 0f 44 c8 e8 43 fc e6 ff 41 83 fc f5 75 10 41 bf f5 ff ff ff f6 43 20 01 0f 84 4e fd ff ff <0f> 0b 45 89 e7 e9 44 fd ff ff cc cc cc cc cc 0f 1f 44 00 00 8b 46
RSP: 0018:ffffb3e5001abb20 EFLAGS: 00010293
RAX: 0000000000000061 RBX: ffffb3e5001abb90 RCX: 0000000000000000
RDX: ffff9959d72a7060 RSI: ffff9959d7298d00 RDI: ffff9959d7298d00
RBP: ffff995939009b98 R08: ffff9959d7298d00 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000001 R12: 00000000fffffff0
R13: 0000000000000001 R14: ffffffffc04a5a20 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff9959d7280000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ff985ba008 CR3: 000000022da0a001 CR4: 00000000001606e0
Call Trace:
 try_to_unmap_one+0xa7a/0xc90
 rmap_walk_file+0x157/0x2f0
 try_to_unmap+0xa6/0xe0
 ? page_remove_rmap+0x4b0/0x4b0
 ? page_not_mapped+0x20/0x20
 ? page_get_anon_vma+0x80/0x80
 migrate_pages+0x7c5/0xc90
 ? isolate_freepages_block+0x370/0x370
 ? __bpf_trace_mm_compaction_kcompactd_sleep+0x10/0x10
 compact_zone+0x703/0xd40
 kcompactd_do_work+0xf5/0x260
 kcompactd+0x82/0x1c0
 ? finish_wait+0x80/0x80
 ? kcompactd_do_work+0x260/0x260
 kthread+0xfe/0x140
 ? kthread_park+0x90/0x90
 ret_from_fork+0x22/0x30