Backtrace

WARNING: CPU: 0 PID: 38 at mm/mmu_notifier.c:502 __mmu_notifier_invalidate_range_start.cold+0x4a/0x56
Modules linked in: squashfs loop uinput rfcomm snd_seq_dummy snd_hrtimer xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp 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 ccm 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 vfat fat intel_rapl_msr intel_rapl_common uvcvideo x86_pkg_temp_thermal intel_powerclamp coretemp videobuf2_vmalloc kvm_intel videobuf2_memops kvm irqbypass videobuf2_v4l2 iTCO_wdt videobuf2_common intel_pmc_bxt videodev iTCO_vendor_support ath9k rapl mc ath9k_common dell_laptop ath9k_hw snd_hda_codec_realtek ath3k btusb btrtl btbcm btintel snd_hda_codec_generic
 snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec bluetooth snd_hda_core snd_hwdep snd_seq snd_seq_device ecdh_generic snd_pcm snd_timer snd soundcore mac80211 intel_cstate ecc at24 dell_wmi ath ledtrig_audio dell_smbios cfg80211 mei_hdcp intel_uncore rfkill dell_wmi_descriptor dcdbas wmi_bmof joydev dell_smm_hwmon sparse_keymap i2c_i801 libarc4 i2c_smbus pcspkr lpc_ich mei_me mei zram ip_tables nouveau i915 drm_ttm_helper ttm i2c_algo_bit hid_multitouch drm_kms_helper mxm_wmi crct10dif_pclmul cec crc32_pclmul crc32c_intel drm ghash_clmulni_intel serio_raw r8169 wmi video fuse
CPU: 0 PID: 38 Comm: kcompactd0 Not tainted 5.12.17-300.fc34.x86_64 #1
Hardware name: Dell Inc. Inspiron 5437/01PN4H, BIOS A10 06/07/2016
RIP: 0010:__mmu_notifier_invalidate_range_start.cold+0x4a/0x56
Code: 9d 89 54 24 04 e8 c6 7f ff ff f6 45 20 01 8b 54 24 04 75 16 83 fa f5 75 11 49 83 7f 30 00 74 0e 0f 0b 41 89 d5 e9 d8 59 75 ff <0f> 0b eb eb 41 89 d5 e9 cc 59 75 ff 49 39 de 74 4b 48 c7 c7 80 30
RSP: 0018:ffffbbbc80187aa8 EFLAGS: 00010202
RAX: 0000000000000061 RBX: ffff9e984028c098 RCX: 0000000000000000
RDX: 00000000fffffff0 RSI: ffff9e986ba185c0 RDI: ffff9e986ba185c0
RBP: ffffbbbc80187b20 R08: 0000000000000000 R09: ffffbbbc801878e0
R10: ffffbbbc801878d8 R11: ffffffff9db45fc8 R12: ffff9e974ddb0780
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffffc074c6a0
FS:  0000000000000000(0000) GS:ffff9e986ba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00003d6139e75b90 CR3: 0000000110a10001 CR4: 00000000001706f0
Call Trace:
 try_to_unmap_one+0xa3c/0xd40
 ? insert_zspage+0x31/0xa0
 ? migrate_page_move_mapping+0x8b/0x740
 rmap_walk_file+0x152/0x2e0
 try_to_unmap+0xa6/0xe0
 ? page_remove_rmap+0x330/0x330
 ? anon_vma_ctor+0x40/0x40
 ? page_get_anon_vma+0x80/0x80
 migrate_pages+0x4eb/0xf30
 ? isolate_freepages_block+0x3c0/0x3c0
 ? split_map_pages+0x160/0x160
 ? migrate_page_states+0x290/0x290
 compact_zone+0x5f8/0xd10
 kcompactd_do_work+0x15a/0x250
 kcompactd+0xb1/0x350
 ? finish_wait+0x80/0x80
 ? kcompactd_do_work+0x250/0x250
 kthread+0x127/0x150
 ? set_kthread_struct+0x40/0x40
 ret_from_fork+0x22/0x30