Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000018
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] SMP PTI
CPU: 3 PID: 1156 Comm: systemd-oomd Tainted: G        W         5.12.8-300.fc34.x86_64 #1
Hardware name: Gigabyte Technology Co., Ltd. Z87-D3HP/Z87-D3HP-CF, BIOS F4 05/16/2013
RIP: 0010:rb_next+0x14/0x50
Code: 89 40 10 e9 c3 fe ff ff 48 c7 07 01 00 00 00 c3 66 0f 1f 44 00 00 48 8b 17 48 39 d7 74 35 48 8b 47 08 48 85 c0 74 1c 49 89 c0 <48> 8b 40 10 48 85 c0 75 f4 4c 89 c0 c3 48 3b 78 08 75 f6 48 8b 10
RSP: 0018:ffffb835802ebe50 EFLAGS: 00010202
RAX: 0000000000000008 RBX: ffffb835802ebee0 RCX: ffff9049c5bfcb00
RDX: ffff9049c5bfc199 RSI: ffff9049c5bff980 RDI: ffff9049c5bfcb18
RBP: 0000000000000000 R08: 0000000000000008 R09: 0000000000000000
R10: ffffffffb134a810 R11: 0000000000000000 R12: ffff904beecb3800
R13: ffff9049c5bff980 R14: ffff9049c5bfcb00 R15: 000000000000000f
FS:  00007fa86bc6eb40(0000) GS:ffff9050df380000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000018 CR3: 0000000119ef2002 CR4: 00000000001706e0
Call Trace:
 kernfs_fop_readdir+0x12d/0x250
 iterate_dir+0x164/0x1b0
 __x64_sys_getdents64+0x70/0x100
 ? __ia32_sys_getdents+0x110/0x110
 ? syscall_trace_enter.constprop.0+0x140/0x1b0
 do_syscall_64+0x33/0x40
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fa86c8ef937
Code: 00 00 0f 05 eb b7 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 09 a5 0f 00 f7 d8 64 89 02 48
RSP: 002b:00007ffce6275068 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 000056536e1f1e10 RCX: 00007fa86c8ef937
RDX: 0000000000008000 RSI: 000056536e1f1e40 RDI: 000000000000000b
RBP: 000056536e1f1e40 R08: 0000000000000030 R09: 00007fa86c9eaa60
R10: 00007fa86c9eb190 R11: 0000000000000293 R12: fffffffffffffea0
R13: 000056536e1f1e14 R14: 0000000000000000 R15: 000056536d24f1fa
Modules linked in: uinput 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 rfkill nfnetlink ip6table_filter ip6_tables iptable_filter sunrpc intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal snd_hda_codec_realtek hid_a4tech intel_powerclamp snd_hda_codec_generic coretemp ledtrig_audio kvm_intel snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec snd_usb_audio snd_hda_core snd_usbmidi_lib snd_rawmidi snd_hwdep mc iTCO_wdt intel_pmc_bxt squashfs iTCO_vendor_support loop snd_seq snd_seq_device snd_pcm mei_hdcp
 at24 joydev kvm irqbypass rapl intel_cstate intel_uncore snd_timer snd lpc_ich soundcore i2c_i801 mei_me i2c_smbus mei pcspkr zram ip_tables uas usb_storage i915 i2c_algo_bit drm_kms_helper crct10dif_pclmul crc32_pclmul cec crc32c_intel drm ghash_clmulni_intel e1000e video fuse
CR2: 0000000000000018