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: 1 PID: 49438 Comm: load_policy Tainted: G           OE     5.9.16-200.fc33.x86_64 #1
Hardware name: TOSHIBA Satellite C640/Portable PC, BIOS 1.60 09/02/2010
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:ffff9d1082b0fc88 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000003
RDX: 0000000000000000 RSI: ffffffffad53ac50 RDI: ffff8fd9f5a2c450
RBP: ffffffffad53ac50 R08: fffff11c02508708 R09: fffff11c02508708
R10: 0000000000000001 R11: 0000000000000006 R12: 0000000000000000
R13: ffff8fd9f5a2c450 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fc2c0f05800(0000) GS:ffff8fdaf3e40000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000012e8e8004 CR4: 00000000000206e0
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: 0033:0x7fc2c10bc297
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:00007ffed2f0cff8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000020 RCX: 00007fc2c10bc297
RDX: 00000000007eab0a RSI: 00007fc2b31ea000 RDI: 0000000000000004
RBP: 0000000000000004 R08: 00007fc2c1153040 R09: 00007ffed2f0ce90
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc2b31ea000
R13: 00000000007eab0a R14: 000000000000000f R15: 0000000000000003
Modules linked in: uinput xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp tun bridge stp llc ccm 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 vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) sunrpc uvcvideo videobuf2_vmalloc videobuf2_memops snd_hda_codec_conexant videobuf2_v4l2 snd_hda_codec_generic videobuf2_common ledtrig_audio videodev mc snd_hda_intel snd_intel_dspcfg snd_hda_codec ath9k ath9k_common ath9k_hw intel_powerclamp snd_hda_core coretemp mac80211 iTCO_wdt snd_hwdep intel_pmc_bxt iTCO_vendor_support snd_seq intel_cstate snd_seq_device at24 ath cfg80211 snd_pcm intel_uncore
 toshiba_acpi sparse_keymap industrialio rfkill wmi libarc4 snd_timer pcspkr snd soundcore mei_me mei i2c_i801 i2c_smbus intel_ips acpi_cpufreq lpc_ich zram ip_tables i915 i2c_algo_bit drm_kms_helper cec drm serio_raw atl1c video ums_realtek uas usb_storage fuse
CR2: 0000000000000000