Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] SMP PTI
CPU: 0 PID: 111783 Comm: load_policy Not tainted 5.9.16-200.fc33.x86_64 #1
Hardware name: Dell Inc. Latitude E5420/0H5TG2, BIOS A14 12/26/2013
RIP: 0010:hashtab_map+0x27/0x70
Code: 00 00 00 66 66 66 66 90 8b 47 08 85 c0 74 60 41 56 45 31 f6 41 55 49 89 fd 41 54 49 89 d4 55 48 89 f5 53 49 8b 55 00 44 89 f0 <48> 8b 1c c2 48 85 db 75 0b eb 25 48 8b 5b 10 48 85 db 74 1c 48 8b
RSP: 0018:ffff9e34823afc88 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000003
RDX: 0000000000000000 RSI: ffffffff9153ac50 RDI: ffff920e93603450
RBP: ffffffff9153ac50 R08: ffffcfcac4365608 R09: ffffcfcac4365608
R10: 0000000000000001 R11: 0000000000000006 R12: 0000000000000000
R13: ffff920e93603450 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f4f5d1cc800(0000) GS:ffff920f2aa00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001292d0002 CR4: 00000000000606f0
Call Trace:
 policydb_destroy+0x2da/0x360
 policydb_read+0x34c/0x1fb0
 ? _cond_resched+0x16/0x40
 ? kmem_cache_alloc_trace+0xef/0x1f0
 ? security_load_policy+0x109/0x5c0
 security_load_policy+0x109/0x5c0
 ? copy_user_generic_string+0x2c/0x40
 sel_write_load+0xeb/0x1b0
 vfs_write+0xc7/0x210
 ksys_write+0x4f/0xc0
 do_syscall_64+0x33/0x40
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f4f5d383297
Code: 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
RSP: 002b:00007fffa2e09318 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000020 RCX: 00007f4f5d383297
RDX: 00000000007eab0a RSI: 00007f4f4f4b1000 RDI: 0000000000000004
RBP: 0000000000000004 R08: 00007f4f5d41a040 R09: 00007fffa2e091b0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4f4f4b1000
R13: 00000000007eab0a R14: 000000000000000f R15: 0000000000000003
Modules linked in: mmc_block 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 nf_tables ip6table_filter ip6_tables iptable_filter ip_tables uas usb_storage tun bridge stp llc rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace nfs_ssc fscache ccm ip_set nfnetlink intel_rapl_msr sunrpc snd_hda_codec_hdmi intel_rapl_common mei_hdcp snd_hda_codec_idt iTCO_wdt snd_hda_codec_generic intel_pmc_bxt snd_hda_intel iTCO_vendor_support x86_pkg_temp_thermal intel_powerclamp coretemp iwldvm ppdev snd_intel_dspcfg mac80211 snd_hda_codec kvm_intel kvm vfat libarc4 fat uvcvideo iwlwifi dell_rbtn snd_hda_core videobuf2_vmalloc videobuf2_memops snd_hwdep videobuf2_v4l2 snd_seq
 videobuf2_common snd_seq_device videodev dell_laptop ledtrig_audio irqbypass snd_pcm mc rapl dell_smm_hwmon intel_cstate cfg80211 intel_uncore dell_wmi dell_smbios joydev dcdbas pcspkr sparse_keymap dell_wmi_descriptor wmi_bmof i2c_i801 i2c_smbus snd_timer mei_me snd rfkill lpc_ich mei soundcore parport_pc dell_smo8800 parport zram i915 i2c_algo_bit drm_kms_helper sdhci_pci cqhci crct10dif_pclmul crc32_pclmul cec crc32c_intel drm sdhci ghash_clmulni_intel firewire_ohci mmc_core firewire_core serio_raw tg3 crc_itu_t wmi video fuse [last unloaded: ip_tables]
CR2: 0000000000000000