Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000398
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 3f5448067 P4D 3f5448067 PUD 0 
Oops: 0000 [#1] SMP NOPTI
CPU: 4 PID: 145 Comm: kswapd0 Not tainted 5.14.11-200.fc34.x86_64 #1
Hardware name: Dell Inc. Latitude 7410/0M5G57, BIOS 1.5.2 02/09/2021
RIP: 0010:btrfs_clear_delalloc_extent+0x27/0x3f0
Code: 1f 40 00 0f 1f 44 00 00 41 57 41 56 41 55 41 54 49 89 d4 55 48 89 fd 53 48 89 f3 48 83 ec 28 48 8b 47 28 4c 8b 46 08 4c 8b 2e <4c> 8b 90 98 03 00 00 4d 89 c6 8b 46 44 4d 29 ee 4d 8d 7e 01 a8 20
RSP: 0018:ffffbb68c1127a40 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff93aba43efa50 RCX: 0000000000001000
RDX: ffffbb68c1127af4 RSI: ffff93aba43efa50 RDI: ffff93ade43beef0
RBP: ffff93ade43beef0 R08: 0000000000000fff R09: ffff93aba43efa50
R10: ffff93ac91818120 R11: 0000000000000000 R12: ffffbb68c1127af4
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000fff
FS:  0000000000000000(0000) GS:ffff93b00d700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000398 CR3: 00000003f3742004 CR4: 00000000003706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 clear_state_bit+0x81/0x1a0
 __clear_extent_bit+0x229/0x4b0
 clear_extent_bit+0x15/0x20
 btrfs_inode_clear_file_extent_range+0x45/0x50
 btrfs_destroy_inode+0x132/0x240
 destroy_inode+0x38/0x70
 dispose_list+0x48/0x60
 prune_icache_sb+0x44/0x50
 super_cache_scan+0x161/0x1f0
 do_shrink_slab+0x13b/0x2b0
 shrink_slab+0x162/0x280
 shrink_node+0x2bf/0x6d0
 balance_pgdat+0x334/0x6b0
 kswapd+0x1e3/0x360
 ? finish_wait+0x80/0x80
 ? balance_pgdat+0x6b0/0x6b0
 kthread+0x124/0x150
 ? set_kthread_struct+0x40/0x40
 ret_from_fork+0x1f/0x30
Modules linked in: sch_netem tun ppp_async pppox ppp_generic slhc echainiv esp4 des_generic des3_ede_x86_64 libdes 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 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 bnep sunrpc vfat fat snd_hda_codec_hdmi snd_sof_pci_intel_cnl snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp intel_tcc_cooling snd_sof x86_pkg_temp_thermal intel_powerclamp coretemp soundwire_bus snd_soc_skl kvm_intel dell_rbtn
 snd_soc_hdac_hda snd_hda_ext_core snd_soc_sst_ipc kvm snd_soc_sst_dsp iTCO_wdt dell_laptop intel_pmc_bxt snd_soc_acpi_intel_match snd_ctl_led snd_soc_acpi iTCO_vendor_support iwlmvm snd_hda_codec_realtek irqbypass mei_hdcp mei_wdt intel_rapl_msr mac80211 dell_smm_hwmon snd_soc_core rapl snd_hda_codec_generic intel_cstate snd_compress ac97_bus snd_pcm_dmaengine uvcvideo dell_wmi ledtrig_audio dell_smbios libarc4 snd_hda_intel videobuf2_vmalloc intel_uncore dcdbas snd_intel_dspcfg videobuf2_memops snd_intel_sdw_acpi videobuf2_v4l2 pcspkr dell_wmi_sysman iwlwifi snd_usb_audio firmware_attributes_class videobuf2_common snd_hda_codec intel_wmi_thunderbolt wmi_bmof dell_wmi_descriptor btusb i2c_i801 snd_hda_core snd_usbmidi_lib snd_rawmidi btrtl snd_hwdep i2c_smbus thunderbolt btbcm videodev snd_seq btintel mei_me snd_seq_device cfg80211 joydev mei bluetooth snd_pcm idma64 mc snd_timer snd processor_thermal_device_pci_legacy processor_thermal_device processor_thermal_rfim
 processor_thermal_mbox soundcore processor_thermal_rapl ucsi_acpi ecdh_generic rfkill typec_ucsi intel_rapl_common intel_pch_thermal intel_soc_dts_iosf typec int3403_thermal int340x_thermal_zone int3400_thermal intel_hid acpi_thermal_rel sparse_keymap acpi_pad soc_button_array zram ip_tables dm_crypt trusted asn1_encoder hid_sensor_hub intel_ishtp_loader intel_ishtp_hid i915 hid_multitouch i2c_algo_bit ttm rtsx_pci_sdmmc drm_kms_helper mmc_core crct10dif_pclmul crc32_pclmul cec crc32c_intel drm ghash_clmulni_intel rtsx_pci nvme nvme_core intel_ish_ipc serio_raw intel_ishtp wmi i2c_hid_acpi i2c_hid video pinctrl_cannonlake fuse
CR2: 0000000000000398