Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000028
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 0 PID: 52361 Comm: umount Tainted: G S      W          6.1.14-200.fc37.x86_64 #1
Hardware name: System manufacturer System Product Name/P9X79 DELUXE, BIOS 1103 04/09/2012
RIP: 0010:iput+0xca/0x220
Code: 78 08 48 89 de e8 46 2f 01 00 65 ff 0d 3f 51 c3 46 75 a0 0f 1f 44 00 00 eb 99 48 8b 6b 28 48 8b 4d 30 a8 08 0f 85 cc 00 00 00 <48> 8b 49 28 48 85 c9 74 61 48 89 df e8 15 7a c1 00 85 c0 48 8b 83
RSP: 0018:ffffb28a02957cc0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff9840aec04178 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffff9840aec04200 RDI: 0000000000000000
RBP: ffff98410ad84880 R08: ffff98407aa05b00 R09: ffffef9940000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff9840aec04200
R13: ffff984009933298 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fa2cca45800(0000) GS:ffff984333a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000028 CR3: 000000012ac02005 CR4: 00000000000606f0
Call Trace:
 <TASK>
 __dentry_kill+0xdc/0x170
 shrink_dentry_list+0x7d/0x160
 shrink_dcache_parent+0xbc/0x100
 shrink_dcache_for_umount+0x37/0x130
 generic_shutdown_super+0x1a/0x130
 kill_anon_super+0x14/0x30
 btrfs_kill_super+0x12/0x20
 deactivate_locked_super+0x2f/0xa0
 cleanup_mnt+0xbd/0x150
 task_work_run+0x59/0x90
 exit_to_user_mode_prepare+0x1c8/0x1f0
 syscall_exit_to_user_mode+0x17/0x40
 do_syscall_64+0x67/0x80
 ? syscall_exit_to_user_mode+0x17/0x40
 ? do_syscall_64+0x67/0x80
 ? exc_page_fault+0x70/0x170
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa2ccc58dab
Code: 8b 70 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 90 f3 0f 1e fa 31 f6 e9 05 00 00 00 0f 1f 44 00 00 f3 0f 1e fa b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 8b 15 51 70 0c 00 f7 d8
RSP: 002b:00007ffe8505bb98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00005587cff974a0 RCX: 00007fa2ccc58dab
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00005587cff989b0
RBP: 00005587cff975b8 R08: 0000000000000030 R09: 0000000000000040
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00005587cff989b0 R14: 00005587cff98420 R15: 00005587cff974a0
 </TASK>
Modules linked in: rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache netfs tls snd_seq_dummy snd_hrtimer xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp bridge stp llc rpcrdma rdma_cm iw_cm ib_cm ib_core 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 nf_tables ebtable_nat ebtable_broute 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 nfnetlink ebtable_filter ebtables ip6table_filter iptable_filter qrtr binfmt_misc vfat fat squashfs snd_hda_codec_realtek snd_hda_codec_generic intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal intel_powerclamp snd_usb_audio snd_usbmidi_lib coretemp snd_hda_codec_hdmi snd_hda_intel snd_rawmidi joydev mc snd_intel_dspcfg kvm_intel snd_intel_sdw_acpi
 snd_hda_codec kvm snd_hda_core eeepc_wmi snd_hwdep snd_seq iTCO_wdt irqbypass snd_seq_device asus_wmi ledtrig_audio sparse_keymap snd_pcm platform_profile intel_pmc_bxt iTCO_vendor_support rapl intel_cstate snd_timer mei_me intel_uncore snd rfkill pcspkr mei wmi_bmof soundcore i2c_i801 lpc_ich i2c_smbus mxm_wmi nfsd auth_rpcgss nfs_acl lockd grace sunrpc loop zram amdgpu iommu_v2 gpu_sched drm_buddy raid1 radeon crct10dif_pclmul crc32_pclmul crc32c_intel polyval_clmulni polyval_generic video ghash_clmulni_intel drm_ttm_helper sha512_ssse3 ttm r8169 e1000e drm_display_helper cec wmi scsi_dh_rdac scsi_dh_emc scsi_dh_alua ip6_tables ip_tables dm_multipath fuse
CR2: 0000000000000028