Backtrace

BUG: kernel NULL pointer dereference, address: 00000000000000b4
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] SMP NOPTI
CPU: 3 PID: 3143 Comm: Backgro~ol #247 Tainted: G         C        5.11.12-300.fc34.x86_64 #1
Hardware name: Gigabyte Technology Co., Ltd. A320M-S2H/A320M-S2H-CF, BIOS F50 11/28/2019
RIP: 0010:find_get_entry+0x70/0x170
Code: e7 e8 74 07 41 00 48 89 c7 48 3d 06 04 00 00 74 e4 48 3d 02 04 00 00 74 dc 48 85 c0 0f 84 c4 00 00 00 a8 01 0f 85 c1 00 00 00 <8b> 40 34 85 c0 74 c4 8d 50 01 f0 0f b1 57 34 75 f2 48 8b 47 08 a8
RSP: 0018:ffffac5a02ecbc50 EFLAGS: 00010246
RAX: 0000000000000080 RBX: 0000000000055e2a RCX: 0000000000000000
RDX: 000000000000002a RSI: ffff9306e763b908 RDI: 0000000000000080
RBP: ffff9306368ad2c8 R08: 0000000000100cca R09: 0000000000000000
R10: 0000000000055e2a R11: ffff9305eaa37ac0 R12: 0000000000000004
R13: ffff9306368ad2c8 R14: 61c8864680b583eb R15: ffff93060c10b740
FS:  00007fd044bbe640(0000) GS:ffff9308ce8c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000000b4 CR3: 0000000179050000 CR4: 00000000003506e0
Call Trace:
 find_lock_entry+0x28/0x1d0
 shmem_getpage_gfp+0xb4/0x950
 ? __hrtimer_init+0xc0/0xc0
 shmem_write_begin+0x3a/0x60
 generic_perform_write+0xb3/0x1a0
 __generic_file_write_iter+0xf9/0x1d0
 generic_file_write_iter+0x5d/0xb0
 new_sync_write+0x108/0x180
 vfs_write+0x1b8/0x270
 ksys_write+0x4f/0xc0
 do_syscall_64+0x33/0x40
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fd064fcc88f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 69 fd ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 bc fd ff ff 48
RSP: 002b:00007fd044bbd5a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd02fc3ebf0 RCX: 00007fd064fcc88f
RDX: 0000000000008000 RSI: 00007fd0352b0000 RDI: 0000000000000084
RBP: 0000000000008000 R08: 0000000000000000 R09: 0000000018d18284
R10: 000000006dbc1909 R11: 0000000000000293 R12: 00007fd0352b0000
R13: 00007fd0366e93a0 R14: 00007fd0257b0000 R15: 0000000000008000
Modules linked in: uinput snd_seq_dummy snd_hrtimer 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 intel_rapl_msr intel_rapl_common sunrpc edac_mce_amd snd_hda_codec_realtek snd_hda_codec_generic r8188eu(C) snd_hda_codec_hdmi ledtrig_audio snd_hda_intel snd_intel_dspcfg soundwire_intel soundwire_generic_allocation snd_soc_core lib80211 kvm snd_compress snd_usb_audio snd_pcm_dmaengine soundwire_cadence cfg80211 snd_hda_codec irqbypass snd_hda_core rapl snd_usbmidi_lib ac97_bus snd_hwdep snd_rawmidi snd_seq pcspkr wmi_bmof sp5100_tco snd_seq_device k10temp i2c_piix4 mc snd_pcm snd_timer joydev rfkill snd
 soundcore gpio_amdpt acpi_cpufreq gpio_generic zram ip_tables hid_logitech_hidpp uas usb_storage hid_logitech_dj nouveau mxm_wmi i2c_algo_bit drm_ttm_helper ttm crct10dif_pclmul drm_kms_helper crc32_pclmul r8169 crc32c_intel cec ghash_clmulni_intel drm nvme ccp nvme_core video pinctrl_amd wmi hid_lenovo fuse
CR2: 00000000000000b4