BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
IP: free_pcppages_bulk+0x15d/0x510
PGD 3b598f067 P4D 3b598f067 PUD 0 
Oops: 0002 [#1] PREEMPT SMP NOPTI
Modules linked in: rfcomm bnep nls_iso8859_1 snd_hda_codec_hdmi edac_mce_amd kvm_amd kvm irqbypass crct10dif_pclmul snd_hda_codec_realtek crc32_pclmul ghash_clmulni_intel snd_hda_codec_generic pcbc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_hda_intel arc4 aesni_intel snd_hda_codec aes_x86_64 crypto_simd glue_helper cryptd snd_hda_core snd_hwdep snd_seq_device snd_pcm snd_timer snd k10temp soundcore mxm_wmi wmi_bmof iwlmvm ccp joydev mac80211 input_leds btusb btrtl btbcm btintel iwlwifi bluetooth ecdh_generic cfg80211 shpchp wmi nvidia_uvm(POE) mac_hid sch_fq_codel cuse parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs xor zstd_compress raid6_pq hid_generic hid_corsair usbhid hid nvidia_drm(POE) nvidia_modeset(POE) nvidia(POE) drm_kms_helper syscopyarea sysfillrect
 sysimgblt fb_sys_fops igb drm dca i2c_algo_bit ipmi_devintf ptp i2c_piix4 ipmi_msghandler ahci pps_core libahci gpio_amdpt gpio_generic
CPU: 6 PID: 2391 Comm: gnome-shell Tainted: P        W  OE    4.15.0-13-lowlatency #14-Ubuntu
Hardware name: Micro-Star International Co., Ltd MS-7A32/X370 GAMING PRO CARBON AC (MS-7A32), BIOS 2.80 01/26/2018
RIP: 0010:free_pcppages_bulk+0x15d/0x510
RSP: 0018:ffffaea40845fba0 EFLAGS: 00010012
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000000000001
RDX: 0000000000000000 RSI: fffff51845046800 RDI: ffff93f21f356450
RBP: ffffaea40845fc18 R08: ffff93f21f356380 R09: 0000000000000001
R10: 0000000000000010 R11: fffff51845046860 R12: 0000000000000000
R13: 0000000000000000 R14: dead000000000100 R15: fffff51845046840
FS:  00007fb01127eac0(0000) GS:ffff93f21ed80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 00000003b4460000 CR4: 00000000003406e0
Call Trace:
 free_unref_page_commit+0xb1/0xf0
 free_unref_page_list+0x108/0x1b0
 release_pages+0x193/0x3e0
 free_pages_and_swap_cache+0xb8/0xd0
 tlb_flush_mmu_free+0x36/0x60
 arch_tlb_finish_mmu+0x47/0x80
 tlb_finish_mmu+0x23/0x30
 unmap_region+0xf7/0x130
 do_munmap+0x27c/0x460
 SyS_brk+0x1a1/0x210
 do_syscall_64+0x73/0x130
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x7fb00e3584b9
RSP: 002b:00007ffc6e007308 EFLAGS: 00000246 ORIG_RAX: 000000000000000c
RAX: ffffffffffffffda RBX: 000055826b539000 RCX: 00007fb00e3584b9
RDX: 0000000000000000 RSI: 00000000000000a1 RDI: 0000558266e3a000
RBP: fffffffffb901000 R08: 0000000000000021 R09: 000055825bc0f100
R10: 00007fb00e62dca0 R11: 0000000000000246 R12: 00007fb00e6300b8
R13: 00007fb00e62e4d8 R14: 000000000471f3e0 R15: 000055826b518da0
Code: c1 e3 06 48 8d 14 1e 8b 5a 18 83 fb 80 0f 84 64 03 00 00 48 8d 14 40 49 c1 e2 04 48 8d 14 90 49 8d 14 d2 49 8b 94 10 c0 00 00 00 <4c> 89 5a 08 49 89 57 20 49 89 7f 28 4c 89 1f 48 8d 14 40 48 8d 
RIP: free_pcppages_bulk+0x15d/0x510 RSP: ffffaea40845fba0
CR2: 0000000000000008
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